Rolls-Royce Archives

Rolls-Royce Experimental Archives: Box ExFiles\Box 87\1\        Box Selection

IdentifierEntry
scan0001 Design changes and material specifications for the Bensfort radiator.
View original record BY. FROM DA. X240 DA3/MS.18.10.32. C. to SG. WOR. HS. E. BENSFORT RADIATOR. Herewith we send N.sch.3561, shewing the bottom of this radiator, including the suspension in the frame. It will be noticed…

scan0002 The design specifics of the Bensport Radiator, including the matrix height.
View original record Hs/Lid. from E. c. Bv. LID X240. E.1/HP.11.10.32. re Bensport Radiator. As far as is known at present the height of the matrix of the above is 23.5 inches, and other particulars as N.Sch. 3561. The…

scan0003 Sending a drawing for a Bensport radiator matrix and the consideration of alternative designs.
View original record To BY. FROM DA/EV. COPY TO SG. W O R. HS. E. X240. EV1/12.10.32. RADIATOR BENSPORT. We send herewith a drawing N.sch.3565. shewing the shape and dimensions of the radiator matrix as requested by "E"…

scan0004 Attaching a blueprint and details for the Bensport Chassis radiator matrix.
View original record E. Dept. H. Dept. Hs/Lid. x 240. BY/SS14/N.14.10.32. Re: Bensport Chassis - Radiator Matrix. We attach hereto blueprint of N.Sch.3565, and copy of memo Evl/12.10.32 shewing the shape and dimensions of…

scan0005 Bensport radiator, discussing drawing N.Sch.3565 and various Harrison Matrix forms.
View original record Copy. X240. To By. from DA/Ev. Ev1/12.10.32. C. to SG. WOR. HS. E. RADIATOR - BENSPORT. We send herewith a drawing N.Sch.3565, shewing the shape and dimensions of the radiator matrix as requested by…

scan0006 Design and specifications for the 'Bensport' radiator and shutters, including models, materials, and associated components.
View original record BY. FROM DA/EV. X240. DA/EVL/M21.10.32. C. to SG. WOR. HS. E. BENSPORT RADIATOR AND SHUTTERS. We sent you last night N. schs. 3562. and 3566. and 3568, which with N. schs. 3561. and 3565. complete the…

scan0007 Standard 3-litre Bentley badge and its required chromium and black enamel finish.
View original record -2- The badge is standard 3 litre Bentley, and is also on the model. We require a chromium finish with black enamel. You will no doubt find out from Bentley's from whence they obtained these two…

scan0008 Confirming revised dimensions for Bensport Radiator Blocks after a phone call with Messrs. John Marston.
View original record Y240. LID Hs/Lid Roy/HW.14/IB. 4.11.32. Bensport Radiator Blocks. ------------------ We confirm having 'phoned Messrs. John Marston to-day the revised dimension of these Blocks i.e. - Height 24.000",…

scan0009 Modified radiator for the Bensport J.1 model to suit an existing engine unit.
View original record X240. To RHC. from E. E.11/HP.8.11.32. c.c. Sr. Hor. Hs. Hy. Da. re Bensport J.1. with existing engine unit radiator and engine suspension. We send you herewith LeC.3258 showing modified radiator to…

scan0010 Final design of the B.3 radiator bottom tank and suspension for the mock-up chassis.
View original record E. } FROM DA/EV. X240. DA/EV1/M1 2.11.32. BY. } C. to SG. WOR. HS. RHC. B.3 RADIATOR BOTTOM TANK AND SUSPENSION. We send herewith N.sch.3588, shews a bottom tank and suspension for the B.3. radiator…

scan0011 Modifications to a Bensport radiator and brake lever to improve clearance.
View original record X260. E. FROM DA. DA9/M16.11.32. C. to BY. HS. BENSPORT RADIATOR. We have looked into the question of the brake levers striking the tank as indicated on N. sch. 3588, and find that this drawing is…

scan0012 Modification of front axle brake levers to prevent them fouling the Bensport radiator.
View original record X240 E. FROM DA. DAL/M1 8.11.32. C. to BY. HS. BENSPORT RADIATOR. ----- With further reference to the question of the brake levers on the front axle fouling the radiator, we have looked into the…

scan0013 Blueprint LeC.3289 for the Experimental Bensport J.1.
View original record X240. To RHG. from E. c. Hs. E/JNR.1/HP.26.11.32. re Experimental Bensport J.1. Please receive herewith blueprint: LeC.3289 - showing the top and bottom water pipes to the radiator, fan and fan drive.…

scan0014 Provision of drawing LeC.3402 for stiffened radiator shutters on a Bensport Series 1.
View original record X240. To BY. from E/JNR. c. for. Hs. Bensport Series 1. Please receive herewith: LeC.3402 showing the stiffened radiator shutters. E/JNR.6/HP.10.3.33. E/JNR.

scan0015 Design and construction of a detachable radiator grill and apron for the Bensport model.
View original record BY. FROM DA/EV. X240. DA/EV1/M16.3.33. C. to SG. WOR. HS. E. BENSPORT - RADIATOR GRILL & APRON. We send herewith N. sch. 3706. shewing the radiator, grill, and front apron, for Bensport. As this…

scan0016 Test radiator grill for a B.4. model, detailing its construction and potential modifications.
View original record TO BY. FROM EV. COPY TO SG. WOR. HS. E. RADIATOR GRILL FOR B.4. As requested by Hs/Rm. we send herewith N.Sch.3710. shewing a radiator grill for Bensport when no shutters are fitted and the grill can…

scan0017 Decision to fit a stone guard and remove the shutters from the Bensport radiator.
View original record To Sg. From Hs. c. to Wor. c. to By. c. to E. c. to Da. BENSPORT RADIATOR. The decision has been made that we shall fit a stone guard in the front of the Bensport radiator. This is not going to be…

scan0018 Clarifying a point from the minutes of a conference regarding circlip strength and requesting tests on a Bensport engine.
View original record X 240. To Hy. from E. E.1/HP.20.3.33. c. Hs. re Minutes of Conference at Derby Thursday March 9th 1933. Referring to your memo Hy.2/GR.13.3.33, the last, but one, paragraph on page 2 should read: "E.…

scan0019 Modification scheme for a Bensport radiator, involving the deletion of shutters and the fitting of a thermostat and stone guard.
View original record X240 RHC. from Hs/Rn. Hs/Rn. 9/KT. 23.3.33. BENSPORT. EV. has given us a scheme for the Bensport radiator whereby we delete the radiator shutters, fit a thermostat instead, and regain the appearance…

scan0020 Bensport radiator, advocating for a thermostatic control instead of shutters.
View original record X240. S/W Hs C3/C23.3.33 BENSPORT RADIATOR. Hs2/MJ20.3.33 ------- Sg. is away for a few days, and your memo. will be brought before him in due course. I presume you do not require any decision at the…

scan0021 Overheating Peregrine engine oil, suggesting improvements by referencing American car cooling systems.
View original record Sg..from PN. X240. PN1/WT17.3.33 Overheating of Engine Oil. Peregrine. --------- Referring to the very interesting and valuable collection of data in Hs/Rml/KT13.3.33, it is to be anticipated that R.…

scan0022 Production instructions for the Bensport Series 1 radiator and bonnet, including material and design specifications.
View original record X240. BY/CS. [text has been struck through] BY/HSR. [text has been struck through] c. Hs. ------------ BY/SS2/N.27.3.33. ------------ [STAMP] RECEIVED 27 MAR 1933 [/STAMP] Bensport Series 1 - Radiator…

scan0023 Radiator shutters and piston issues on the Bensport car.
View original record X200. To Hs. from Sg. Copy to Wor:Ph.E. DA. re Bensport Radiator. Sg18/E27.3.33 Referring to Hs.2/MJ.20.3.33 I see no objection to shutters being dispensed with on the Bensport for the reasons given…

scan0024 Bensport radiator scheme, piston failures, and testing plans for the Bensport car.
View original record COPY. 8240 To Sg. From Hs. c. to Wor. c. to E. c. to By. Hs.4/MJ.28.3.33. BENSPORT RADIATOR. Replying to Sg.18/E.27.3.33. We have received a scheme from W.W. of a Bensport radiator built up without…

scan0025 Bonnet material and production proportions for open versus closed body types for the Bensport Series 1 chassis.
View original record X260 W/S. Ex. from E. c. Sg. Wor. Hs. By. E.4/HP.6.4.33. Bensport Series 1 - Radiator and Bonnet. ---------------------------------------- With reference to the bonnet material for the 200 sets of…

scan0026 The removal of tie bars from the Bensport radiator bottom tank.
View original record X240. By. From Hs/Rm. c. to RHC. Hs/Rm.17/MA.13.4.33. BENSPORT RADIATOR BOTTOM TANK. tie We are arranging to leave out the/bars across the Bensport radiator bottom tank for our first 10,000 mile run.…

scan0027 Modifications to a radiator bottom tank for simplification.
View original record X240. To BY. from E/JNR. c. Hs. RHC. re Bensport. We send you herewith: LeC.3454 showing some modifications to the radiator bottom tank, with a view to making it simpler. We have deleted both cross…

scan0028 Order for rubbers and Ferobestos parts for a Bensport radiator mounting.
View original record X2r+O. Roy/Ms. from Hs/Les. Hs/Les.6/KT.24.4.33. BENSPORT RADIATOR MOUNTING. Will you please order the following rubbers from Messrs British Goodrich. 6, to FB.280 - Grade DM/OY. 6, to FB.277 - Grade…

scan0029 Schemes for altering the Bensport radiator mounting on Bentley cars.
View original record X240 To BY. from E. c.c. Mr. Wor. Hs. Bensport Radiator Mounting. It is very evident from the results obtained with No.2. Bentley car that some alteration will be necessary to the radiator suspension.…

scan0030 Torque reaction dampers, chassis suitability, and modifications for engine mounting.
View original record - 2 - E.2/HP.26.4.33. ------------ this is only in conjunction with powerful torque reaction dampers between the frame and the engine. We do not know whether heavy damping of this nature is…

scan0031 Request to make an experimental set for mounting the Bensport radiator directly onto the engine, referencing blueprint LeC.3467.
View original record X240. To RHC. from E/JNR. c. Wor. Hs. By. E/JNR.2/HP.28.4.33. re Bensport Radiator Mounting. We wish to try the effect of mounting the radiator on the engine. We send you herewith blueprint LeC.3467…

scan0032 Modifications to the Bensport radiator mounting.
View original record X240. To BY. from E/JNR. c. Hs. NHC E/JNR.4/HP.1.5.33. Bensport Radiator Mounting. We send you herewith: LeC.3470 showing the radiator centrally mounted. The recent modifications we sent you on…

scan0033 Clarifying decisions made about the first 15 chassis of the 3.5 litre Bentley.
View original record To Hs. By. Sft. RHC. } from E. X240 c.c By/SS. re 3½ litre Bentley. Referring to the minutes of the Conference with WOR. of May 24th, it was decided that the first 15 chassis should not be fitted with…

scan0034 New Bentley radiator grille design featuring vertical, chromium-plated slats.
View original record To BY. from E/JNR. c. Wor. Hs. RHC. X260 E/JNR.1/HP.27.5.33. Bentley Radiator Grille. We send you herewith: LeC.3511 showing a new radiator grille built into the existing radiator shell. This consists…

scan0035 Design alterations for the new shape Bentley radiator.
View original record X240. To BY. from E/JNR. c.-Wor. Hs. RHC. re Bentley New Shape Radiator. We send you herewith Lec.3507, showing the above radiator with the Vee front altered to 20°, to improve the appearance. The…

scan0036 Ordering of specific rubber pads for the radiator suspension on the 3 1/2 Litre Bentley.
View original record Rm BY/HEB. X240. c. Hs/Rm. BY/SS.2/J.31.5.33. 3 1/2 Litre Bentley - Radiator Suspension. We should order the Rubber Pads FB.280 for the first 15 chassis in accordance with those fitted to the…

scan0037 Requesting a test on a modified Water Temperature Regulator design for a Bentley vehicle.
View original record LID Please make this test on the Blue car as soon as it comes out of the shop. To Hs/Rm. from E/JNR. X240. E/JNR/5/HP.20.7.33. Rm Bentley. The Works have criticised our design of Water Temperature…

scan0038 Blueprint detailing a modification to a Bensport water temperature regulator.
View original record TRACED FROM LeC 3488. WE HAVE CHEAPENED THE INTERNAL CONSTRUCTION OF THE REGULATOR BY DELETING THE PRESSURE BALANCE VALVE. THIS IS THE ONLY MODIFICATION IN THIS SCHEME. WE ANTICIPATE THAT THIS…

scan0039 On testing and improvements for the Bentley centre radiator mounting to resolve bonnet knocks.
View original record To E. from Hs/Les. c. to By. Hs/Les.13/KT.27.6.33. BENTLEY CENTRE RADIATOR MOUNTING LeC.3470. We found that the above scheme, with fairly soft control rubbers either side of the centre point, caused…

scan0040 Confirming a modified Bentley radiator shell is ready for production.
View original record X206 To HY. from E. c. Hs./Rm. RHS. Sft. re Bentley Radiator. We think the new Bentley shell with the modification to the shoulders and the upper radii of the opening is ready to be instructed for…

scan0041 Improved form of radiator jacket for the Bentley Chassis.
View original record RHC. Sft. c. E c. BY/CC X L-PO BY.6/G. 24.7.33. BENTLEY CHASSIS - RE IMPROVED FORM OF RADIATOR JACKET. ------------------- Will you kindly note that E. informs me that he is satisfied with the new…

scan0042 Design and production of radiator badges for Bentley cars.
View original record X260. To W.O.H. from E. c.By. Hs. ROY. Radiator Badges for Bentley Car. Following on ROY.16/WG.19.7.33, sample badges for an embossed finish were submitted by a firm specialising in this class of work…

scan0043 Photograph of a Bentley 'B' winged radiator badge.
View original record B "□"

scan0044 Design drawing for the Bentley Radiator Badge with detailed annotations.
View original record Le.C.3592 THE MOUNT IS .250 LESS WIDE ON THE MINOR AXIS THAN THE ORIGINAL BENTLEY MASCOT AND PROPORTIONATELY REDUCED ON THE MAJOR AXIS. THE ACTUAL OUTLINE OF THE 'B' SHOULD BE TAKEN FROM THE SAMPLE…

scan0045 Modifications to the Bentley radiator shell to accommodate shutters.
View original record To BY. from E. c. Mr. Hs. Sft. RHC. X2404 E.10/HP.31.8.33. Bentley Radiator and Shutters. Referring to the above, the thicker shells in .048" material should be ordered with the extra thickness added…

scan0046 Improvements to the Bentley radiator shutters and shell.
View original record To-BM. from E/JNR. c. FDr. Sft. Hs. NHO. X240. E/JNR.2/HP.2.9.33. Bentley Radiator and Shutters. Please receive herewith: LeC.3613 shewing the above with improvements to the shutter sections, and the…

scan0047 Confirming design changes for thermostatically operated shutters on a Bentley.
View original record X2 of To BY. from E. c. Wer. Hs. Mfty. Mix. EP. Dy/US. re Thermostatically Operated Shutters on Bentley. This confirms that in returning to thermostatically operated shutters the present bypass on the…

scan0048 Drawing for a Bentley Thermostat modification.
View original record X260. To BY. from E/JNR. c. Hs. Sft. E/JNR.1/HP.9.9.33. LID re Bentley Thermostat. We send you herewith drawing: LeC.3627 shewing a pipput on the end of the central operating rod to provide a means of…

scan0049 Alteration request for the 3 1/2 Litre Bentley radiator side steady brackets to prevent wear.
View original record R.M E. Dept. c. Hs/GWH. X2 GWH BY/SS17/N.21.9.33. Re: 3 1/2 Litre Bentley - Radiator Side Steady Brackets. With the centrally mounted radiator to LeC.3470, the wear on the side of the elongated hole…

scan0050 Design revision for the Bentley centre radiator mounting to increase movement and prevent stud failure.
View original record To By. from Hs/Les. Hs/Les.14/KT. 25.9.33. BENTLEY CENTRE RADIATOR MOUNTING LeC.3470. Referring to our Hs/Les.13/KT.27.6.33. where we instructed that the spring EB.818 should replace the rubber for…

scan0051 New design for an experimental Bentley radiator with a reduced depth to save weight.
View original record To BY. from E/JNR. LID+200 c. Mr. Hs. E/JNR.4/HP.10.10.33. Bentley Radiator. We send you herewith a design for an experimental radiator which should be put in hand as quickly as possible. The depth of…

scan0052 Request to manufacture two Bentley radiators with a new 70mm matrix specification.
View original record K260 To RHC. from Hs/Lid. Hs/Lid.4/KT.27.10.33. BENTLEY RADIATORS. Will you please make up two Bentley radiators to LeC.3665. This radiator is to suit a 70 mm. matrix the present standard being 84 mm.…

scan0053 Requesting an increase in thread size for a Bentley radiator tie rod due to a failure.
View original record X240 To BY from E/JNR. c. Hs. Scl. E/JNR.2/HP.20.12.33. Bentley Radiator Tie Rod Failure. Will you please as soon as possible increase the size of the thread of E.58376 from .250 to .312. E/JNR.

scan0054 Disadvantages of radiator shutters and considering chromium-plated grids as an aesthetic alternative.
View original record To Wor. from Sg. Copy to Hs.F.BY. Ba. BY. [Handwritten] H3 Radiator Shutters. Referring to Hs/Rm.13/KW29.12.33 I think that this is a matter which we might usefully discuss at our next chassis…

scan0055 Decision not to fit new levers to the Bentley radiator thermostat.
View original record 8240 To E. From Hs/GWH. c. to By. c. to RHC. Hs/GWH.1/MJ.23.1.34. BENTLEY RADIATOR SHUTTERS. It has been decided not to fit the new levers EB.1497, EB.363, and EB.364 to the Bentley radiator…

scan0056 Modified fixing for the Ferodo strip on a Bentley radiator to prevent damage to bonnet panels.
View original record X240 To BY. from E/JNR. E/JNR.6/HP.23.1.34. c. Hs. Sft. RHC. Ferodo Strip on Bentley Radiator.- Sft.3/BH.19.1.34. We send you herewith drawing: LeC.3773 showing a modified fixing for the Ferodo strip…

scan0057 Modifications for fitting a Ferodo strip on the Bentley radiator.
View original record Handwritten top: X240 GWH See me Handwritten left: Re from Sft. Cc. Bye C. Hs. Cc. RHO Sft2/BH.31.1.34. FERODO STRIP ON BENTLEY RADIATOR. With reference to your memo' E/JMR6/HP.23.1.34, subject to the…

scan0058 Introduction of a starting handle tunnel with cover for Bentley radiator shutters.
View original record Sg. c. Hs. c. E x240 BY/Cgh.10/G. 9.3.34. BENTLEY RADIATOR SHUTTERS. With further reference to Sg.23/E.5.2.34., we now find that the Works can introduce the starting handle tunnel with cover at the…

scan0059 Request to experimentally produce a radiator grille for a Bentley, to replace the existing shutters.
View original record X240 To BY. from E/JNR. c. Hs. RHC. E/JNR.3/HP.6.4.34. Bentley Radiator. We send you herewith drawing:- LeC.3865 showing a radiator grille which can be fitted to the Bentley radiator in place of the…

scan0060 Fitting of a radiator grille and thermostat to a Bentley.
View original record To Hs. from E/JNR. R X240 E/JNR.1/HP.28.4.34. Steadman C.RHC [Text is struck through] We should have this fitted to B50AH in conjunction with the narrow Harrison matrix. Will arrange to do tests on…

scan0061 Modifications to a Bentley Radiator Grille, including fitting stiffeners and a starting handle tunnel.
View original record x40 To RHC. from E/JNR. c. Hs. re Bentley Radiator Grille. -------------------------- Please receive herewith: LeC.3908 showing stiffeners introduced at the back of the grille. These can be fitted to…

scan0062 The testing of a new Bentley radiator grille.
View original record x240 EXPERIMENTAL DEPARTMENT REPORT REFERENCE :-Hs/Std.2/WA.10.5.34. Subject of Report :-Testing New Bentley Radiator Grille. General Conclusions :- This grille reduces the radiator efficiency too…

scan0063 Test report on a Bentley radiator grille's cooling efficiency at Brooklands Track.
View original record Hs/Std.2/MA.16.5.34. REPORT ON TESTS DONE ON BENTLEY RADIATOR GRILLE AT BROOKLANDS TRACK (MAY 15th 1934.) In order to estimate the reduction in cooling efficiency at high speeds due to fitting…

scan0064 Graph charting the effect of a radiator grille on engine cooling for a Bentley at different speeds.
View original record EFFECT OF RADIATOR GRILLE ON COOLING (BENTLEY) TESTS CARRIED OUT ON BROOKLANDS TRACK WATER TEMP °C GRILLE FITTED (80 M.P.H) NO GRILLE FITTED (80 M.P.H) GRILLE FITTED (60 M.P.H) NO GRILLE FITTED (60…

scan0065 Effect of a radiator grille on bonnet air temperature.
View original record X200 Copy for Files. 17.5.34. Further to our report reference Hs/Std.2/MA.16.5.34., we give the attached curves of bonnet air temperature with and without radiator grille. As will be seen from these…

scan0066 Graph of radiator tests at Brooklands Track, recording under-bonnet air temperatures with and without a grille fitted at various speeds.
View original record RADIATOR TESTS AT BROOKLANDS TRACK - BONNET AIR TEMPS. RECORDED (15/5/34) AIR TEMP UNDER BONNET °C. 40 30 20 10 0 GRILLE FITTED - 80 MPH. GRILLE FITTED - 60 MPH. NO GRILLE " - 80 MPH. NO GRILLE - 60…

scan0067 Graph plotting the results of radiator tests, showing under-bonnet air temperatures at different speeds with and without a grille.
View original record RADIATOR TESTS AT BROOKLANDS TRACK - BONNET AIR TEMPS. RECORDED (CAR 1S.34) AIR TEMP UNDER BONNET °C GRILLE FITTED - 50 M.P.H. GRILLE FITTED - 60 M.P.H. NO GRILLE - 50 M.P.H. NO GRILLE - 60 M.P.H.…

scan0068 Instructions for radiator modifications on car B23AE for Brooklands tests.
View original record X NO RHC. From Hs/Std. Hs/Std.5/MA.17.5.34. RADIATORS FOR BROOKLANDS TESTS ON B23AE. Referring to our memo Hs/Std.6/MA.3.5.34., we have already tested the radiator grille mentioned and find that since…

scan0069 Letter from a supplier regarding a delivery delay for a Harrison Vee bonded matrix radiator.
View original record NEW TELEPHONE Nos. 21481 (4 LINES) X40 Steadman IMPERIAL CHEMICAL INDUSTRIES LIMITED. ESTABLISHED 1790. TELEPHONE: 1481 (4 Lines) TELEGRAMS: SUNBEAM, WOLVERHAMPTON. FROM JOHN MARSTON LIMITED, PAUL…

scan0070 Instructions for fitting and modifying radiators on a Bentley car for Brooklands tests.
View original record X240 RHC. From Hs/Std. Hs/Std.5/MA.23.5.34. RADIATORS FOR BROOKLANDS TESTS. We have decided that Bentley Car 3.B.IV would be more suitable than B.23AE for these tests, so will you please cancel…

scan0071 Requesting standard Bentley radiator parts be sent to John Marston Ltd. for fitting to a Harrison Vee bonded matrix radiator.
View original record X240 RHC. From Hs/Std. Hs/Std.3/MA.18.5.34. Will you please have a set of standard Bentley radiator top and bottom tanks and necessary fittings dispatched to Messrs.John Marston Ltd., Paul Street…

scan0072 Request to test a 58mm Harrison Vee bonded matrix radiator on a Bentley car for 10,000 miles.
View original record X240 By. From Hs/Std. Hs/Std.2/MA.18.5.34. We wish to run a 58 mm Harrison Vee bonded matrix Radiator on the next 10,000 miles Bentley Car. Will you please have suitable narrow top and bottom tanks…

scan0073 Letter to Messrs. John Marston Ltd. regarding the assembly of parts for a Bentley car radiator.
View original record X240 Hs/Std.1/MA. 18th May, 1934. Messrs. John Marston Ltd., Paul Street, Works, Wolverhampton. For the attention of Mr. Dalrymple. Dear Sir, We are sending you a set of parts (top and bottom water…

scan0074 Instruction to modify and re-test a Bentley radiator grille for temperature drop at Brooklands.
View original record To HHG. from E. c. Sg. Mor. Hs. re Bentley Radiator Grille. Confirming verbal instruction, will you please remove every other horizontal bar in the Bentley radiator grille, as per sample herewith. We…

scan0075 Requesting the addition of metal strips to a Bentley radiator grille to improve airflow.
View original record RHC. From Hs/Std. X240 Hs/Std.1/MA.5.6.34. BENTLEY RADIATOR GRILLE. We understand that you are going to alter the above grille as instructed in memo E.1/HP.1.6.34. We wish to have strip of metal…

scan0076 Standardisation of unbalanced shutters on a Bentley chassis.
View original record Hs/Rm. [Text crossed out] c. to E. [/Text crossed out] [Text crossed out] c. to WOT. [/Text crossed out] [Text crossed out] c. to BY. [/Text crossed out] [Handwritten signature] Rm ROY/MS4/P.2.7.34.…

scan0077 Production of tools for unbalanced shutters on the Bentley Chassis.
View original record To By. c. to Wor. c. to E. c. to Roy. X 240 Hs/Rn.5/KW.4.7.34. Unbalanced Shutters on the Bentley Chassis. Referring to ROY/MS4/P.2.7.34. Unless you hear to the contrary we consider that it would be…

scan0078 The weights of various Bentley radiators.
View original record X240 WEIGHT OF RADIATORS - BENTLEY. (1) Present standard Marston Mark III with shutters and fitments :- Weight empty 84 lbs.4 oz. Weight full of water 106 " " (2) Harrison Vee, with shutters and…

scan0079 List comparing the empty and full weights of four different Bentley radiator configurations.
View original record WEIGHT OF RADIATORS - BENTLEY. (1) Present standard Marston Mark III with shutters and fitments :- Weight empty 84 lbs. 4 oz. Weight full of water 106 " " (2) Harrison Vee, with shutters and fitments…

scan0080 Comparison of weights for different Bentley radiator models, both empty and full of water.
View original record May, 1934. WEIGHT OF RADIATORS - BENTLEY. 1) Present standard Marston Mark III with shutters and fitments :- Weight empty 84 lbs. 4 ozs. Weight full of water 106 lbs. 2) Harrison Vee, with shutters…

scan0081 Improved manufacturing methods and additional tinning charges for Marston Radiator Matrices.
View original record Typed Steadman To BY. from ROY. c. to H. c. to Hs. ------------ ROY8/MGS.7.34 ---------------- Radiator Matrices Further to our recent discussion regarding improved manufacturing methods for the…

scan0082 Request for the return of a 58mm Bentley Harrison Vee bonded matrix for comparison testing.
View original record x no C.W.Hancock, Esq., Hotel de France, Chateauroux, Indre, FRANCE. From Hs/Std. Hs/Std.1/MA.14.9.34. Will you please return to us the 58 mm Bentley Harrison Vee bonded matrix which you have at…

scan0083 Bentley radiator tests comparing Harrison type and standard matrix constructions.
View original record To E. c. to Wor. c. to By. c. to Da. X 240 HS/Rn.12/KW.14.9.34. Bentley Radiator Tests. We send you herewith results of radiator tests carried out at Brooklands and in France. The main object of these…

scan0084 Fan options for different climates, radiator specifications, and the effect of air intake shutters on carburation.
View original record -2- HH/Rm.12/KW.14.9.34. We feel that actually if we supplied two fans, one for normal use and the other for tropical countries or customers living in Switzerland, we could probably get another 10%…

scan0085 Tests of various Bentley radiators, fans, and radiator grilles at Brooklands.
View original record HS/Std.13/KW.14.9.34. Report on Tests carried out at Brooklands on Various Bentley Radiators, Fans & Radiator Grille. -------------------- The tests were carried out in the usual manner by noting…

scan0086 Conclusions from tests on different radiator matrix types, grilles, shutters, and fans for a Bentley.
View original record -2- Conclusions. (a) From consideration of sheet 1 it is seen that the Marston Mark V type of matrix (Harrison Vee bonded type) is much more efficient than the Marston Mark III type. Also the 58 m.m.…

scan0087 Effect of different cooling fans on a vehicle's maximum speed and lap time.
View original record -3- Hs/Std.13/KW.14.9.34. Effect of Cooling Fans on Maximum Speed. | Type of Fan fitted. | Time for 1 Lap Secs. | Speed M.P.H. | |---|---|---| | No Fan | 117.5 | 84.8 | | Std. Bentley Fan | 120.0 |…

scan0088 Graph comparing the performance of different Bentley radiator matrices tested at Brooklands.
View original record SHEET 1 BENTLEY RADIATORS COMPARISON OF RADIATOR MATRICES (BENTLEY) (TESTS CARRIED OUT AT BROOKLANDS - SEPT 4 & 5 1934) AIR TEMP TO BOIL - °C NOTE:- BARE MATRIX TESTED - NO SHUTTERS OR THERMOSTAT…

scan0089 Line graph comparing the cooling efficiencies of a Marston Mark III radiator matrix with and without shutters and a grille, tested on a Bentley 3B IV.
View original record SHEET 2 BENTLEY RADIATOR COMPARISON OF COOLING EFFICIENCIES OF STD. 84 MM MARSTON MARK III MATRIX WHEN FITTED WITH SHUTTERS & FITTED WITH GRILLE. TESTS CARRIED OUT AT BROOKLANDS TRACK ON BENTLEY 3B IV…

scan0090 Graph showing the rise of air intake temperature with the rise of water temperature during tests on a Bentley 3 B.T.V.
View original record SHEET 3 BENTLEY RADIATOR CURVE SHOWING RISE OF AIR INTAKE TEMPERATURE WITH RISE OF WATER TEMPERATURE. TESTS CARRIED OUT AT BROOKLANDS ON BENTLEY 3 B.T.V SEPT 4 & 5 1934 AIR INTAKE TEMP. - °C TOP TANK…

scan0091 Graph comparing the performance of different Bentley radiator matrices.
View original record FRANCE SHEET 4 BENTLEY RADIATORS COMPARISON OF RADIATOR MATRICES (BENTLEY) TESTS CARRIED OUT IN FRANCE BY G.W.H. - Aug 8th 1934 AIR TEMP TO BOIL NOTE - SHUTTERS OPEN THROUGHOUT TESTS NOTE:- FAN FITTED…

scan0092 Graph comparing the performance of different Bentley radiator matrices, with and without fans, during a hill climb test in France.
View original record FRANCE SHEET 5 BENTLEY RADIATORS COMPARISON OF MATRICES WITH AND WITHOUT FANS ON PUY DE DOME - HILL IN FRANCE WITH 400 METRES RISE IN 4300 METRES LENGTH AIR TEMP. TO BOIL °C 40 30 20 FAN V FAN II…

scan0093 Graph comparing bonnet air temperatures for a thermostatically controlled shutter system versus a bypass system at different speeds.
View original record SHEET 6 COMPARISON OF BONNET AIR TEMPS WITH (a) THERMOSTATICALLY CONTROLLED SHUTTER SYSTEM (b) THERMOSTATICALLY CONTROLLED BYPASS SYSTEM AIR TEMP THRO' OUT TESTS - 20°C THERMOSTATS GIVE APPROX EQUAL…

scan0094 Comparative test document detailing engine and air temperatures for vehicles fitted with a grille versus radiator shutters.
View original record xno? To Hs/Rm. Hs/FD.23/KW.19.9.34. Comparative Tests with Grille and Radiator Shutters. Comparisons have been taken with 2-B-IV fitted with standard radiator and shutters, and B-23-AE fitted with…

scan0095 Analysis with calculations for the effect of altitude on a standard radiator's 'air temp to boil' figure.
View original record FILE x740 ANALYSIS OF EFFECT OF ALTITUDE ON STANDARD "AIR TEMP. TO BOIL" RADIATOR FIGURE. For given radiator dissipating constant amount of heat, Let To = air temp. to boil at ground level " T = " " "…

scan0096 Page from a report with formulas for calculating boiling points at different altitudes.
View original record -2- But t1 + To = 100 ∴ t1 = 100 - To ∴ T = B - (100 - To)/d Hence, from this formula, for any given set of conditions the air temp. to boil at any altitude may be found, knowing the air temp. to boil…

scan0097 Graph showing the variation of the boiling point of water, air temperature, and relative air density with altitude.
View original record VARIATION OF BOILING POINT AIR TEMP. AND RELATIVE AIR DENSITY WITH ALTITUDE BOILING POINT OF WATER. 100 90 80 °C. AIR TEMP. 20 10 0 -10 RELATIVE DENSITY. 1.00 .5 ALTITUDE IN FT. 2,000 4,000 6,000…

scan0098 Graph showing the sea level air temperatures required for boiling to occur at various altitudes.
View original record CURVES SHOWING SEA LEVEL AIR TEMPS FOR BOILING. TO TAKE PLACE AT GIVEN ALTITUDE. Y-AXIS: SEA LEVEL AIR TEMP: °C TO BOIL AT GIVEN ALTITUDE. X-AXIS: ALTITUDE IN FEET Y-AXIS VALUES: 0, 10, 20, 30, 40, 50…

scan0099 Graph showing the variation of air temperature required to boil radiator fluid against altitude.
View original record VARIATION OF "AIR TEMP: TO BOIL" RADIATOR FIGURE WITH ALTITUDE. °C ALTITUDE - FT. SEA LEVEL TEMP: TO BOIL - 50°C SEA LEVEL TEMP: TO BOIL - 40°C SEA LEVEL AIR TEMP: TO BOIL 30°C AIR TEMP:

scan0100 The water capacities of cooling systems for the Phantom II, 20/25 HP, and Standard Bentley models.
View original record X 40 26.9.34. Capacities of Various Car Cooling Systems. (1) Present Standard Phantom II :- (Radiator & fittings - LOP.E.81407) Water capacity of complete system - 5 galls 5 pts. " " " radiator - 3 "…

scan0101 Weight comparison between a Standard Bentley Marston Mark III Matrix and a Marston Mark V Matrix.
View original record X260 5.10.34. Comparison of Weights of Bentley Radiator Matrices. ------------------------------------------- Standard Bentley Marston Mark III Matrix (84 m.m.). Weight, empty - 83.25 lbs. Water…

scan0102 Standardisation of parts document for unbalanced radiator shutters.
View original record RR 755B (5H) (57394. 30-1-34) BM 3/787/1 COMPLETED 18.10.34 BENTLEY STANDARDISATION of PARTS. Date 27-9-34 X No. 240. Drawing No. 3798. Part List Description of Parts. UNBALANCED RADIATOR SHUTTERS.…

scan0103 Estimate for the cost of extra equipment and bringing the D.2 series chassis into production.
View original record STANDARDISATION OF PARTS [Reversed text] Est. cost of extra jigs, tools and equipment (Sft/WS.18.9.34) £59.0.0. Could be brought on to production (Sft/GH.18.9.34) at 1st chassis in D.2 series, without…

scan0104 Letter to John Marston Limited regarding the inconsistent cooling performance of their Mark V radiator matrices.
View original record X240 Hs/Std.23/KW. Exptl. Dept. 25th October, 1934. Messrs. John Marston Limited, Paul Street Works, Wolverhampton. For the attention of Mr. Dalrymple. Dear Sirs, We have been testing two of your Mark…

scan0105 Letter requesting advice and the manufacture of a new radiator matrix.
View original record -2- Hs/Std.23/KW.25.10.34. We should also like your advice as to whether it is preferable, when reducing the size of the 58 m.m. Mark V matrix (as we are contemplating doing) to decrease the frontal…

scan0106 Modifications to the Bentley Marston Mark V radiator matrix based on test results.
View original record To RHC. X240 Hs/Std. 21/KW. 25.10.34. Bentley Radiators (Marston Mark V Type). As the result of tests on the 58 m.m. Marston Mark V Bentley radiator matrix, we find that we can reduce the area of this…

scan0107 Dispatch of a Bentley radiator for a matrix fitting.
View original record To RHC. X240 We send you herewith a Bentley radiator fitted with a 58 m/m. Marston Mark V matrix (less shutters, shell, filler cap and thermostat). Will you please have this despatched to Messrs. John…

scan0108 Alterations to a Bentley radiator grille for testing purposes.
View original record X240 To RHC. Hs/Std.19/KW.25.10.34. Bentley Radiator Grille: We send you herewith Bentley radiator grille to LEC.3865. We understand that you discussed the alteration to be made to this grille…

scan0109 Request to Messrs. Marston to modify an experimental Bentley Marston Mark V radiator matrix.
View original record LRO Not sent out - rel'd from D.O. as note from R.H.C. covers job. To Roy: Hs/Rm.11/KW.26.10.34. Br Std. 29/10/34 Will you please ask Messrs. Marston to modify an experimental Bentley Marston Mark V…

scan0110 Instructions to John Marston Ltd. regarding modifications to a Bentley radiator matrix.
View original record +40 Exptl. Dept. Hs/Std.21/KW. 26th October, 1934. Messrs. John Marston Ltd., Paul Street Works, Wolverhampton. For the attention of Mr. Dalrymple. Dear Sirs, Further to our letter of yesterday with…

scan0111 Letter to Messrs. John Marston Limited regarding a leaking radiator matrix being returned for examination.
View original record x240 Exptl. Dept. Hs/Std.4/KW. 29th October,1934. Messrs. John Marston Limited, Paul Street Works, Wolverhampton. For the attention of Mr. Dalrymple. Dear Sirs, Referring to our letter…

scan0112 Further tests on Bentley Radiators at Brooklands.
View original record x240 1.11.34. Report on Further Tests on Bentley Radiators at Brooklands (see previous report). Tests. A number of radiator tests were carried out at Brooklands in the usual manner for the following…

scan0113 Summary of cooling system tests with recommendations for fan and matrix configurations on a Bentley car.
View original record -2- (3) From sheet (3) is seen the difference in our intake temperature under full throttle conditions with the two methods of temperature control, and this difference falls as the power output of the…

scan0114 Graph comparing the performance of 70mm and 58mm deep Bentley radiator matrices (Marston Mark V) at different car speeds.
View original record SHEET (1) BENTLEY RADIATORS COMPARISON OF BENTLEY RADIATOR MATRICES (MARSTON MARK V) OF VARYING DEPTHS (70 MM & 58 MM) AIR TEMP TO BOIL °C CAR SPEED 30 MPH FULL THROTTLE 45 MPH FULL THROTTLE 60 MPH…

scan0115 Line graph comparing the performance of two similar 58mm Marston Mark V radiator matrices at various car speeds.
View original record SHEET (2) BENTLEY RADIATORS COMPARISON OF TWO SIMILAR 58 MM MARSTON MARK V RADIATOR MATRICES Y-AXIS: AIR TEMP TO BOIL °C X-AXIS: CAR SPEED X-AXIS LABELS: 30 M.P.H FULL THROTTLE 45 M.P.H FULL THROTTLE…

scan0116 Graph comparing carburettor air intake temperatures against car speed for shutter and by-pass radiator controls.
View original record SHEET (3) BENTLEY RADIATORS COMPARISON OF AIR INTAKE TEMPERATURES WITH SHUTTER AND BY-PASS CONTROL OF WATER TEMP. CARBURETTOR AIR INTAKE TEMP. °C CAR SPEED 40 M.P.H FULL THROTTLE 84 M.P.H FULL…

scan0117 Graph determining the permissible reduction in area for Bentley radiators to achieve equal cooling compared to a standard matrix.
View original record SHEET (4) BENTLEY RADIATORS DETERMINATION OF THE REDUCTION IN AREA PERMISSIBLE WITH 58 m/m MARSTON MARK V MATRIX TO GIVE EQUAL COOLING TO STD. MATRIX (MARK III) NOTE - BLANKING EXTENDS WIDTH OF MATRIX…

scan0118 Graph comparing the cooling performance and speeds obtained with three different Bentley fan types against a no-fan configuration.
View original record SHEET (5) BENTLEY RADIATORS AND FANS COMPARISON OF COOLING AND SPEEDS OBTAINED WITH THREE DIFFERENT TYPE OF FAN AIR TEMP TO BOIL °C LEGEND (ABBREVIATED): (a) STAGGERED 20/25 FAN (b) PER. FAN (c) STD.…

scan0119 Instructions for the construction and testing of a new fan cowl for a Bentley radiator.
View original record 4240 To RHC. Hs/Std.7/KW. 9.11.34. Bentley Fan Cowling. (Hs.1599) We send you herewith a diagrammatic sketch of a fan cowl which we propose to try on the Bentley radiator. The purpose of this is to…

scan0120 Further tests and modifications to a radiator grille to improve cooling efficiency.
View original record 1240? E. From Hs/Std. c. to Wor. c. to By. Hs/Std.12/MA.14.9.34. FURTHER TESTS ON RADIATOR GRILLE TO LEC.3865. Since this grille was last tested (Hs/Std.13/KW. 14.9.34.) a further modification has…

scan0121 Graph plotting the air temperature to boil, comparing radiator performance with and without a grille fitted on a Bentley.
View original record TESTS ON BENTLEY RADIATOR GRILLE (LEC 3865) TESTS CARRIED OUT ON 'SNAKE' PASS NEAR GLOSSOP. AIR TEMP: TO BOIL - °C NO GRILLE FITTED GRILLE FITTED CONDITIONS OF TESTS 40 M.P.H. FULL THROTTLE NO FAN…

scan0122 Drawings for radiator and engine suspension modifications for the Bentley.
View original record Wyman x240 - To - BY. from Da. Da.6/HP.13.11.34. C. Wor. E. Hs. Hdy. RHC. Bentley - 1st and 2nd Moves. Herewith N. Sch.4235,4244 showing the radiator crossmember, engine and radiator suspension and…

scan0123 Requesting a study into bi-metal thermostats for hot spot control, referencing American cars and radiator design.
View original record To Hs/Std. 4240 Hs/Rm.3/KW.21.11.34. We want you to make a study of bi-metal thermostats in relation to hot spot control. There is a bi-metal thermostat fitted on the automatic starting choke on the…

scan0124 The design and specification of a centrally mounted radiator for a Bentley.
View original record x40 By. From Hs/Std. c. to Da. Hs/Std.8/MA.22.11.34. CENTRALLY MOUNTED RADIATOR AND WINGS FOR BENTLEY. We find on examining N.sch's 4235, 4238, & 4244 that the radiator matrix shown is of Marston Mark…

scan0125 The measurement of air speeds at various points in front of a Bentley radiator on car B-23-AE.
View original record X240 27.11.34. Air speeds in front of Bentley Radiator. The air speeds at different points in front of a Bentley radiator have been measured by means of a small Pilot Tube used in conjunction with the…

scan0126 Graph plotting wind speed versus car speed at various measurement positions in front of a Bentley radiator.
View original record FIG. 1 WIND SPEEDS IN FRONT OF BENTLEY RADIATOR - BONNET ON AIR SPEEDS TAKEN AT POSITIONS SHOWN PITOT TUBE 5 1/2" IN FRONT OF MATRIX TAKEN ON B23.A.E. SHUTTERS FULL OPEN WIND SPEED - M.P.H. CAR SPEED…

scan0127 Graph of wind speed versus car speed measured at various positions in front of a Bentley radiator with the bonnet off.
View original record FIG. 2 WIND SPEEDS IN FRONT OF BENTLEY RADIATOR - BONNET OFF AIR SPEEDS TAKEN AT POSITIONS SHOWN PITOT TUBE 5 1/2" IN FRONT OF MATRIX TAKEN ON B.23.A.E. SHUTTERS FULL OPEN. A NEGATIVE WIND SPEED WAS…

scan0128 Report on anti-spill radiator cap valves, comparing an in-house design to the 'Camel' type.
View original record To E. x40 Hs/Rm.7/KW.29.11.34. Anti-Spill Radiator Cap Valve. Attached is a report from Steadman on our own anti-spill radiator valve compared with the "Camel" type of valve. I raised the point…

scan0129 Dissatisfaction with existing anti-spill radiator caps and recommending a new design based on an American 'Camel' valve.
View original record To E. Hs/Std.8/KW.29.11.34. Anti-Spill Radiator Caps. We are dissatisfied with the present anti-spill valve in our radiator caps, which we have tested and found to leak seriously - in the tests in…

scan0130 Diagrammatic sketch of an anti-spill valve in a radiator top tank.
View original record HS. 1633. ESCAPE PIPE. THIS VALVE MAY EITHER BE CONTROLLED BY A CORRUGATED PRESSURE DISC AS SHOWN, OR BY A DISC OF SIMILAR SIZE SPRING LOADED WITH A HELICAL SPRING. TO FILLER. REAR FACE OF TOP TANK.…

scan0131 Fitting of a shortened matrix radiator to car 5.B.IV.
View original record +240 RHC. From Hs/Std. Hs/Std.4/MA.4.1.35. SHORTENED MATRIX RADIATOR FOR 5.B.IV. Referring to our memo Hs/Std.21/KW.25.10.34., we understand that the necessary parts for this radiator are now ready.…

scan0132 Standardisation of parts for a 58 m.m. Harrison Radiator.
View original record RR 755B (5H) (S7394. 30-1-34) BM 3/787/1 COMPLETED 7.1.35. BENTLEY STANDARDISATION of PARTS. Date 13.9.34. Description of Parts. 58 m.m. HARRISON RADIATOR. Origin. This saves 20 lbs. in weight. Report…

scan0133 Estimated cost and production note for extra jigs and tools for the 'D' series chassis.
View original record Est. cost of extra jigs tools and equipment (Sft/Ws.18.9.34) £287.0.0. Could be brought on to production at 1st chassis in "D" series (Sft/GH.18.9.34) without scrap.

scan0134 Request to order two different Bentley radiator matrices, one from the Harrison Radiator Corporation and one from Marstons.
View original record Roy. From Hs/Std. <240 Hs/Std.3/MA.16.1.35. Will you please order two Bentley radiator matrices for us, as follows :- (1) Matrix to altered drawing EB518, attached, in the Harrison Radiator…

scan0135 Letter to John Marstons, Ltd. regarding the construction of American-style radiator matrices for a Bentley.
View original record Filed Hs/Std.4/MA. 16th January, 1935. Messrs.John Marstons, Ltd., Paul Street Works, Wolverhampton. For the attention of Mr.Dalrymple. Dear Sir, Referring to our recent discussion of American type…

scan0136 Comparison of frontal area, weight, and total savings for three different radiator matrix designs.
View original record +40 19.1.35. (1) Frontal area of standard matrix - 471 sq.in. (2) " " " N.Sch.4235 " - 396 " " (3) " " " shortened expt. Matrix - 356 " " (1) Weight of standard shape matrix in Harrison Vee 31.5 29…

scan0137 Comparison table of weights for various Bentley radiator components.
View original record X240 22.1.35. BENTLEY RADIATOR WEIGHTS. | Component | Std. Bentley Rad. | 58 mm. Mark III Matrix and Narrow Bottom Tank otherwise std. | 58 mm. Matrix & all possible lightening. | |---|---|---|---| |…

scan0138 Instructions for building a lightened Bentley radiator and a staybrite steel radiator shutter.
View original record To RHC. Hs/Std.1/KW.13.2.35. Bentley Lightened Radiator. We wish to lighten the Bentley radiator as much as possible, and therefore wish you to build up a radiator incorporating the following :- (1)…

scan0139 New brace design for the radiator frame on Bentley cars with independently mounted wings.
View original record To BM. Copy to Hs/Rm. RHC Handwritten annotation: Rm x vHO E/Ev.1/MN.18.3.35. Bentley Independently Mounted Wings and Radiator. We send herewith LeC 4403 showing a brace across the back of the…

scan0140 Comparison table of specifications for the proposed Wraith radiator against the Bentley Experimental and 20/25 HP radiators.
View original record V240 Hs/Std 23/KW. 19.3.35. Comparison of Proposed Wraith Radiator with Bentley and 20/25 HP. Radiators. Detail | Proposed Wraith | Bentley Expt. Short Matrix. | 20/25. --- | --- | --- | --- Matrix…

scan0141 Modifications to the radiator for the Bentley Centrally Mounted Wings scheme.
View original record To RHC. Hs/Std.17/KW.20.3.35. Bentley Centrally Mounted Wings & Radiator. We wish to lighten the radiator for this scheme as far as possible and should therefore like you to construct the following…

scan0142 Instructions for lightening the radiator and constructing a shutter for the Bentley Centrally Mounted Wings scheme.
View original record To RHC. Hs/Std.17/KW. 20.3.35. Bentley Centrally Mounted Wings & Radiator. We wish to lighten the radiator for this scheme as far as possible and should therefore like you to construct the following…

scan0143 Instruction to fit a specially constructed Bentley radiator with a reduced matrix area to the streamline car B.23AE.
View original record two RHC. From Hs/Std. Hs/Std.1/MA.20.3.35. BENTLEY RADIATOR WITH REDUCED MATRIX AREA. You have constructed a Bentley radiator for us with a special small matrix (6" shorter than standard) together…

scan0144 Acquisition and construction of new Harrison Vee radiator matrices for Bentley, for comparison with Marston Mark V matrices.
View original record To RHC. +WO Hs/Std.8/KW.23.3.35. Bentley Radiator Matrices. We now have a special Harrison Vee matrix for a Bentley radiator in the stores; this is the latest product of the Harrison Radiator…

scan0145 Revised table of weights and dimensions for various types of radiator matrices.
View original record L240 Hs/Std.1/KW. 25.3.35. REVISED MATRIX WEIGHTS. Matrix | Weight lbs. | Frontal Area Sq.ins. | Depth Ins. | Vol. Cu.Ins. | Wt./ Unit lbs/ Vol. Cu.Ins. --- | --- | --- | --- | --- | --- Bentley old…

scan0146 Requesting a specific Bentley radiator be rebuilt for comparison tests at Brooklands.
View original record To RHC. 4240 Hs/Std.3/KW.26.3.35. Bentley Radiator Tests. In connection with the radiator comparisons which we propose to carry out shortly at Brooklands we shall require a radiator with the 58 m.m.…

scan0147 Request to the coppersmiths to make two pipes to connect a Bentley radiator to an engine for flow restriction tests.
View original record To Mr. Bowers. two Hs/Std.17/KW.26.3.35. Will you please have your coppersmiths make two pipes to connect a Bentley radiator to a Bentley engine in No. 5 Test House, in order to carry out flow…

scan0148 Difficulty of fitting an experimental short matrix radiator to car B-23-AE and proposing a temporary solution.
View original record To RHC. X240 Hs/Std.5/KW. 29.3.35. Referring to our memo. Hs/Std.1/MA.20.3.35, we understand that there is some difficulty in fitting the Exptl. short matrix radiator to B-23-AE, owing to the details…

scan0149 Letter to John Marston Ltd. discussing a weight discrepancy between a new Bentley matrix and an American Vee product.
View original record LMO Exptl. Dept. Hs/Std.3/KW. 4th April, 1935. Messrs. John Marston Ltd., Paul Street Works, Wolverhampton. For the attention of Mr. Dalrymple. Dear Sirs, We have received the special 58 m.m. Bentley…

scan0150 Comparison table of particulars for two different types of matrices.
View original record -2- Hs/Std.S/KW.4.4.35. Comparison of Matrix Particulars. | Matrix | Weight lbs. | Frontal Area Sq.ins. | Depth Ins. | Vol. cu.ins. | Wt. )Unit
Lbs.)Vol. cu.ins. | |---|---|---|---|---|---| |…

scan0151 Letter from John Marston Limited regarding analysed weights of a 58mm Bentley Matrix and proposing a meeting.
View original record Steadman H40 IMPERIAL CHEMICAL INDUSTRIES LIMITED. FROM JOHN MARSTON LIMITED, WOLVERHAMPTON. TELEPHONE: 21481 (4 LINES) TELEGRAMS: SUNBEAM, WOLVERHAMPTON. CODES: A.B.C. 5TH & 6TH EDITIONS; BENTLEY'S.…

scan0152 Letter to John Marston Limited arranging a meeting to discuss the weights of Bentley Matrices.
View original record Filed Exptl. Dept. Hs/Rm.6/KW. 15th April, 1935. Messrs. John Marston Limited, Wolverhampton. Dear Sirs, Replying to your letter of the 12th April, it will be convenient to discuss the weights of the…

scan0153 Table of revised matrix weights and specifications for various models.
View original record X40 Hs/Std.10/KW.16.4.35. REVISED MATRIX WEIGHTS. Matrix | Weight lbs. | Frontal Area sq.ins. | Depth ins. | Vol. cu.ins. | Wt. / Unit lbs./ vol. cu.ins. --- Bentley old std. Marston Mark III | 38.0 |…

scan0154 Request to place an official order with Messrs. John Marston Ltd. for a Bentley Experimental Radiator Matrix.
View original record To Roy: X-VCD Hs/Std.2/KW.24.4.35. Bentley Experimental Radiator Matrix. -------------------------------- Will you please send an official order to Messrs. John Marston Ltd. for one Bentley 52 mm.…

scan0155 Letter to John Marston Limited regarding an order for a Mark VI 52 mm. experimental matrix.
View original record Xnco Exptl. Dept. Hs/Std.1/KW. 24th April, 1935. Messrs. John Marston Limited, Wolverhampton. For the attention of Mr. Howard Southall. Dear Sirs, We thank you for your letter of the 17th instant, and…

scan0156 Acquisition of a new American Harrison Vee Matrix for Bentley radiator comparison tests.
View original record To RHC. x40 Hs/Std.11/KW.3.5.35. Bentley Radiator Tests. We expect to receive on Monday from Messrs. John Marston their copy of the latest 52 mm. American Harrison Vee Matrix; as soon as this matrix…

scan0157 Bentley radiator tests involving a new American Harrison Vee Matrix from John Marston.
View original record To RHC. X140 Hs/Std.13/KW. 8.5.35. Bentley Radiator Tests. We expect to receive on Saturday May 11th, from Messrs. John Marston, their copy of the latest 52 mm. American Harrison Vee Matrix; as soon…

scan0158 Revised tubular cross-member for a Bentley, related to a centrally mounted radiator.
View original record XV60 [Signature] STEADMAN To BY. from Da. SECRET. Da.5/HP.25.C.35. c. Wor. E. Hs. Rmc. Hoy. Bentley - Centrally Mounted Radiator, Lamps, Wings, etc. Herewith is N.Sch.4542 shewing a revised…

scan0159 Tests carried out on Marston Mark VI and Harrison Vee bonded Bentley radiator matrices.
View original record V40 To E. From Hs/Std. c. to Wor. c. to Da. c. to By. c. to Hdy. REPORT ON TESTS CARRIED OUT ON LATEST MARSTON MARK VI. & HARRISON VEE BONDED BENTLEY RADIATOR MATRICES. The matrices tested were as…

scan0160 Radiators, water cooling difficulties, and weight reduction.
View original record -2- Hs/Std.4/MJ.31.7.35. Cont'd. radiators - it should materially decrease the water cooling difficulties on the latter while effecting a weight reduction. Hs/Std.

scan0161 Results of radiator comparison tests conducted at Brooklands.
View original record RESULTS OF RADIATOR COMPARISONS AT BROOKLANDS 10.7.35. Conditions. - Full throttle, full speed, 87 M.P.H. approx. No shutters or grille fitted. ALL TEMPERATURES IN DEGREES CENTIGRADE. Matrix. | Air…

scan0162 Summary comparing the cooling performance and weights of different radiator matrices.
View original record Hs/Std.1/KW. 8.8.35. Summary of Radiator Matrix Comparisons. Cooling. Matrix. Mark V. Mark VI. Dissipates 9% more heat than Mark V. American Harrison Vee Dissipates 14% more heat than Mark VI.…

scan0163 The despatch of two Bentley radiators to John Marston & Co. Ltd.
View original record To D/BP. c. to G/Mt. X-ND Hs/Std.17/KW.12.8.35. We are to-day sending two Bentley radiators (less shell, shutters, etc.) into the stores for despatch to Messrs. John Marston & Co.Ltd., Wolverhampton.…

scan0164 Scheme to fix rattling radiator shutters on Bentley cars by using spring loading.
View original record To RHC. +NO Hs/Std.4/KW.14.9.35. Radiator Shutters - Bentley. One of the troubles which has always been experienced with radiator shutters on R.R. cars, and Bentleys in particular, is that of rattles,…

scan0165 Graph plotting water and air temperature against distance during a climb of the Stelvio Pass.
View original record WATER TEMPERATURE OF B-56-BN CLIMBING THE STELVIO PASS TRIAL STARTED ON 14TH HAIR PIN ORIGINAL TYPE BENTLEY RADIATOR FITTED SPEED 12 M.P.H IN 2ND SPEED DATE 30 - VIII - 35 AIR TEMPERATURE WATER…

scan0166 Radiator tests at John Marston Ltd., comparing various matrices and correlating rig tests with road tests.
View original record X-40 To E. c. to By. Hs/Std.14/KW.6.11.35. Report on Tests carried out and information gathered during visit to Messrs. John Marston Ltd., Wolverhampton, and attempts to correlate rig test figures…

scan0167 Methods for measuring water and air flows, followed by criticisms of the test rig.
View original record -2- Hs/Std.14/KW.6.11.35. Water flows are measured by means of a calibrated water meter. Air flows are measured in two ways - the actual air velocity at approx. the centre of the duct in front of the…

scan0168 Issues with a test rig for measuring heat and flow, with suggestions for improvements.
View original record -3- Hs/Std.14/KW.6.11.35. (6) The method of measuring the water flow is satisfactory, provided suitable orifice plates are used in the meters. During these tests the correct plates were not fitted and…

scan0169 Brief list and summary of tests comparing heat dissipation and air speed in various radiator matrices.
View original record -4- Hs/Std.14/KW. 6.11.35. Below we give a brief list of the tests shown on attached sheets :- (1) Sheet 1 shows a comparison between the American Bentley matrix and the Mark VI Bentley matrix,…

scan0170 Summary of findings and recommendations from comparative tests on different radiator matrices.
View original record -5- Hs/Std.14/KW.6.11.35. (6) Sheet 6 shows the variation in heat dissipation with air speed through the matrix in the case of 52 m.m. and 65 m.m. Mark V matrices. This was obtained by interpolating…

scan0171 Calculations for the heat dissipation and critical air temperature of a Spectre matrix.
View original record (Appendix - Sheet 1) Calculations for Spectre Matrix. From test bed figures, heat to be dissipated at 85 m.p.h. full throttle = 8100 B.T.U's/min. From test figures, at 85 m.p.h. dissipation of Mark V…

scan0172 Calculations for pressure correction under the bonnet based on car speed and air velocity.
View original record (Appendix - Sheet 2) Hs/Std.14/KW.6.11.35. Correction for pressure under bonnet :- For car speed of 85 m.p.h. equiv. dynamic head = .070 x 124.7 x 27.7 / 64.4 x 144 = 3.250 "H2O ∴ Total head in front…

scan0173 Calculations for cooling performance, heat dissipation and critical air temperature.
View original record (Appendix - Sheet 3) HS/Std.14/KW.6.11.35. Since pressure difference ∝ v^1.8 and cooling ∝ v^.8 (both very nearly) if H₂ = cooling under car conditions and H₁ = cooling under rig conditions, H₂ = H₁ x…

scan0174 Calculations comparing the dissipation and critical temperature of Mark VI and Mark V components.
View original record (APPENDIX - SHEET 3a) Hs/Std.14/KW.6.11.35. Using Mark VI 84 m.m. matrix and taking ratio of Mark VI dissipation / Mark V dissipation = 1.15 (15% represents mean gain with Marston's latest Mark VI…

scan0175 Calculation for Bentley (85 m.p.h. Full Throttle) using Marston Mark VI 52 m.m. Matrix.
View original record (Appendix - Sheet 4) Hm/Std.14/KW.7.11.35. Calculation for Bentley (85 m.p.h. Full Throttle) using Marston Mark VI 52 m.m. Matrix. From test figures (sheet ) heat dissipation at 85 m.p.h. = H / Δt =…

scan0176 Estimation of theoretical pressure under the Spectre bonnet at a car speed of 85 m.p.h.
View original record (Appendix - Sheet 5) This sheet not sent out– Estimation of Theoretical Pressure under Spectre Bonnet at car speed of 85 m.p.h. Area of Spectre matrix (frontal area) = 601 sq." Total area of outlets…

scan0177 Calculation for total head under a bonnet, with a note regarding pressure tests conducted in France on a Spectre bonnet.
View original record (Appendix - Sheet 6) Hs/Std.14/KW.7.11.35. This sheet not sent out- Total head under bonnet = .40 + .26 = .66 "H₂O NOTE: G.W.H. carried out tests in France to ascertain pressure under Spectre bonnet.…

scan0178 Graph comparing the cooling properties of Marston Mk. VI and A.H.V. 52 M.M. Bentley matrices.
View original record SHEET (1) COMPARISON OF COOLING PROPERTIES OF MARSTON MK. VI AND A.H.V. 52 M.M. BENTLEY MATRICES FRONTAL AREA OF BENTLEY MATRIX (EB 516) - 3.13 □' WATER FLOW DURING TEST - 177 LBS/MIN TESTS CARRIED…

scan0179 Graph showing the variation of cooling with car speed for 52mm Mk V and Mk VI Marston matrices.
View original record SHEET (2) B.TR. U'S. HEAT DISSIPATED / MIN / °C DIFF. TEMP BETWEEN WATER AND AIR INLET TEMPS. VARIATION OF COOLING WITH CAR SPEED IN CASE OF 52 M.M. MK V AND MK VI MARSTON MATRICES FRONTAL AREA OF MK…

scan0180 Graph showing the variation of cooling with matrix depth at various car speeds for Marston Mk IV Matrices.
View original record SHEET (3) VARIATION OF COOLING WITH MATRIX DEPTH AT VARIOUS CAR SPEEDS (MARSTON MK IV MATRICES) FRONTAL AREA OF TEST BLOCK : 2.0 sq ft HEAT DISSIPATED / MIN / °C DIFF. TEMP BETWEEN INLET WATER AND…

scan0181 Graph showing the variation of cooling with car speed for different depths and types of Marston Mk V radiator matrices.
View original record SHEET 4. VARIATION OF COOLING WITH CAR SPEED WITH DIFFERENT DEPTHS OF MARSTON MK V RADIATOR MATRICES FRONTAL AREA OF TEST BLOCK = 2 □' CAR SPEED - M.P.H. HEAT DISSIPATED / MIN / °C DIFF. TEMP. BETWEEN…

scan0182 Graph showing the variation of air speed through a radiator core against car speed for different matrix types.
View original record SHEET 5 VARIATION OF AIR SPEED THRO' RADIATOR CORE WITH CAR SPEED. NOTE:- AIR SPEED THRO' CORE IS CALCULATED ON ASSUMPTION THAT THE FREE FLOW AREA OF MATRIX EQUALS THE FRONTAL AREA. AIR SPEED THRO'…

scan0183 Graph showing the variation of cooling with air speed through different Marston cores.
View original record [ "SHEET 6.", "VARIATION OF COOLING WITH AIR SPEED THRO' CORE", "(ASSUMING FREE AREA = FRONTAL AREA OF MATRIX.)", "HEAT DISSIPATED/MIN/°C DIFF BETWEEN AIR & WATER INLET TEMPS. B.Th.U'S.", "AIR SPEED…

scan0184 Graph plotting under bonnet pressures in inches of water against speed in miles per hour.
View original record SHEET 7 UNDER BONNET PRESSURES - 3 - S - 1 PRESSURE TAKEN AT POINT CLOSE AGAINST DASH, ON CENTRE LINE OF ENGINE & BEHIND THE CARBURETTERS. O WITH FRONT LOUVRES TAKING IN AIR. X '' '' REJECTING AIR.…

scan0185 Inspection scheme for fixed radiator shutters and comparing rattling complaints between RR and Bentley models.
View original record STEADMAN # +V40 To Wor. from Sg. re Fixed Radiator Sg1/E10.12.35 Copy to E.Hs. Shutters. Referring to what I saw in the Experimental Department last week on a RR, I understand that a scheme will be…

scan0186 Scheme for fixed radiator shutters on a Bentley radiator.
View original record Sg. from Wor. c. to E. c. to Hs. Wor2/R.11.12.35. Re: Fixed Radiator Shutters. Sgl/E10.12.35. A scheme will be fixed up for inspection on a Bentley radiator, and the radiator, as mentioned in the…

scan0187 Bentley Radiator Grille, noting that its slats are identical to those used on the Spectre model.
View original record RHC. c. to Hs. C. STEADMAN xno Rm E/JNR.3/HP.13.12.35. Bentley Radiator Grille. Ref.Sg.1/E.10.12.35. Wor.2/R.11.12.35. We send you herewith:- LeC.4874 showing the above. The section of the slats are…

scan0188 Requesting the urgent return of a radiator used for fitting spring-loaded shutters.
View original record To RHC. x240 Hs/AFM.22/KW.20.12.35. Centrally mounted Radiator off 5-B-IV. We understand that you have been using this radiator for fitting up the spring loaded shutters for 6-B-IV, but that you have…

scan0189 Design modifications for a slatted Bentley radiator grille model.
View original record + no Sg. from E. STEADMAN c.Wor. Hs. By. RRS. re Slatted Bentley Radiator. We are sending you the model of the slatted grille erected on a Bentley radiator, so that you can judge of its appearance.…

scan0190 Expressing disapproval of the Slatted Bentley Radiator.
View original record XMO NB To E. from Sg. Copy to Wor.Hs.HH. RHC. C. Cx. Re Slatted Bentley Radiator. Sg2/E3.1.36 Referring to E.3/HB.21.12.35, this arrived the other day and C, Cx. and I have examined it. I am sorry to…

scan0191 List of estimated critical atmospheric temperatures for 20/25 and Bentley radiators with various engine and matrix configurations.
View original record x40 FILE. Hs/Std.6/JH.15.1.36. Estimated Critical Atmospheric Temperatures of 20/25 and Bentley Radiators with large and small bore engines. (assuming steam valves set to blow at 2 lbs/sq.in.) (raises…

scan0192 Request to complete an order for a 58 m.m. Mark VI Marston Matrix for a 6-B-IV chassis for engine cooling tests.
View original record RHC. XNO Hs/Rm.4/KW.31.1.36. 58 m.m. Mark VI Marston Matrix for 6-B-IV. This matrix has been ordered because we think that the big bore engine may be inadequately cooled with the narrow matrix at…

scan0193 Flimsy aluminium radiator shutter bearing support plate on model 6-B-IV, recommending a stiffer steel replacement.
View original record To RHC. X no Hs/Std.5/KW.6.2.36. Spring Loaded Radiator Shutters on 6-B-IV. While endeavouring to measure the loads to open and close the shutters on the above radiator, we have observed that the…

scan0194 Distance piece for mounting a radiator on a stiffened Bentley chassis, requesting one be made.
View original record To RHC. X240 HS/AFM.8/JH. 25.3.36. RADIATOR MOUNTING ON STIFFENED BENTLEY CHASSIS. We attach hereto Rm. 97 which shows a distance piece for fixing to the stud in the centre of the spherical seating on…

scan0195 Proposing to replace rubber hoses and Dermatine joints with Leyland 'PR' hoses and Klingerite jointing on water connections for the Phantom III, Bentley & 25/30 models.
View original record To RHC. 240 Hs/Std.10/JH.6.7.36. Water Connections on Ph.III, Bentley & 25/30. Our attention has been drawn by the shop to the state of various rubber hose and Dermatine water joints which have been…

scan0196 Sending a Bentley Mark VI radiator matrix for testing on a Bumper chassis.
View original record x 2407 To RHC. Rm/Std.11/JH.22.10.36. Bentley Radiator Matrix for Bumper Chassis. We send you herewith a Bentley 52 m.m. Mark VI matrix of special lightened construction which we wish to test on the…

scan0197 Instructions to modify and examine a matrix for a Bentley Bump Radiator.
View original record To RHC: D 240 Rm/Std.22/JH.30.10.36. Matrix for Bentley Bump Radiator. We wish to modify our instructions as mentioned in Rm/Std.11/JH.22.10.36. We wish to bump a Mark VI 52 m.m. matrix of lightened…

scan0198 Cancelling previous instructions and providing new ones for reconditioning and rebuilding a radiator matrix for a Bentley.
View original record 240 To HPS. from Rm/Std. Rm/Std.14/AP.14.11.36. Referring to our memos Rm/Std.22/JH.30.10.36. and Rm/Std.11/JH.22.10.36. we we wish to run the new lightened Bentley matrix on the next 15,000 miles…

scan0199 Poor fit of replacement slats for Bentley radiator shutters and suggesting depots stock and shape them locally.
View original record To Hy. [crossed out] c. to Hs. [crossed out] c. to HMC. [crossed out] c. to Rm/Std. [Handwritten]: 260 [Handwritten]: noted [Handwritten]: Rm/STD Kingsbury. 2nd Dec. 1936. Bentley Radiator Shutters. A…

scan0200 Replacement and fitting of Bentley radiator shutters.
View original record 1113 240 To Ey. c. to Hs. c. to RHC. c. to Rm/Std. Kingsbury. 2nd Dec. 1936. Bentley Radiator Shutters. A point that Kingsbury has brought to my attention is replacement of the slats in the shutters…

scan0201 Design modifications for the Bentley III radiator mounting.
View original record To BY. Copy to Ba. Rm. RHO. HFS. E/Ev.4/MN.23.12.36. 240 Bentley III Radiator Mounting. We send herewith N.Sch.4984 showing the radiator mounting for Bentley III. The Silentbloc bush is used and the…

scan0202 The despatch of a Bentley radiator cap and mascot.
View original record To G/Mt. from Rm/FD. c. to D/BP. Will you please despatch one Bentley radiator cap and mascot to Lillie Hall marked for the attention of Mr.Crawford. This is Sales property returned. Rm/FD.…

scan0203 Despatch of a Bentley radiator cap and mascot removed from chassis 5.B.IV.
View original record W/LH. To RC. from Rm/FD. [Handwritten] J 240 Rm/FD.27/AP.18.1.37. We are despatching today the Bentley radiator cap,and mascot removed from 5.B.IV. Will you please arrange for our cap to be returned.…

scan0204 The modification and testing of a Bentley radiator with dummy shutters.
View original record 240 2. HPS from Rm/Std. Rm/Std.3/M.4.V.37. We have a Bentley Radiator which has had a set of dummy shutters rigged up on it in order to dispense with thermostatically controlled shutters and yet…

scan0205 Recommending the standardisation of the calorstat spring on Bentley cars to regulate water temperatures.
View original record 240 To By from Rm/Std. c to E. c to D.A. c to M.X. Rm/Std.5/M.4.2.37. Bentley Water Temperatures. We understand from Mx that the average Bentley production chassis water temperature is in the region…

scan0206 Tests on 3RIV for cooling water temperatures with and without calorstat spring fitted.
View original record Tests on 3RIV for cooling water temperatures with and without calorstat spring fitted. (1) No spring fitted. (AIR TEMP. 0°C). Top Tank Temp. Minimum running temp. under road condition. 64° C. Maximum…

scan0207 Loads required to operate shutters on various radiators at the calorstat spindle.
View original record COPY LOADS REQUIRED TO OPERATED SHUTTERS ON VARIOUS RADIATORS (ALL AT CALORSTAT SPINDLE). (1) 3-B-IV. Load to open fully + 6.5 lbs. Load to close fully + 7.2 lbs. (2) 1st. standard radiator. Load to…

scan0208 Graph of Calorstat effort versus water temperature for a standard Bentley radiator, showing shutter positions.
View original record TESTS ON STD BENTLEY RAD. CALORSTAT CALORSTAT EFFORT / TEMP CURVES SHUTTERS CLOSED POSITION SPRING FITTED SHUTTERS OPEN WATER TEMP - °C 40 60 80 100 PUSH LBS 20 10 0 PULL LBS 10 20 G.S. Harrison…

scan0209 The loads required to operate shutters on various types of radiators, all measured at the Calorstat Spindle.
View original record -4- (SHEET 2) Hs/Std.22/KW.16.1.36. Loads Required to operated shutters on various Radiators (all at Calorstat Spindle) (1) 3-B-IV. Load to open fully + 6.5 lbs. Load to close fully + 7.2 lbs. (2) 1st…

scan0210 Letter to John Marston & Co. Ltd. concerning Bentley Radiator specifications and spot welding feasibility.
View original record (Experimental Dept.) Rm/Std2/M. 11th February, 1937. Messrs. John Marston & Co.Ltd., WOLVERHAMPTON. Dear Sirs, We send you herewith a number of detail drawings of our Bentley Radiator as requested by…

scan0211 Page 2 of a letter arranging a meeting and listing attached prints.
View original record - 2 - 11.2.37. glad of an opportunity to discuss with you one or two matters concerning it, either at Derby or Wolverhampton, as convenient to you, early next week. If you would let us know which day…

scan0212 Fixed shutters for a Bentley, their appearance, potential savings, and a plan to show them in London.
View original record & S CASTH 240 S/W To Rm. from Sg. Copy to Hs. re Bentley Shutters. Sg1/E11.2.37 I thought the fixed shutters on the car on which I was driven to Nottingham looked quite well. I should like to have it…

scan0213 Proposal to standardise fixed slats and thermostatic by-pass control on Bentley cars instead of thermostatic shutters.
View original record G/Rb from Rm/Std. Rm/Std7/M.12.2.37. We have demonstrated to Sg. a Bentley Car fitted with fixed slats instead of thermostatic shutters, and think that there is a strong possibility that we may be…

scan0214 Benefits of a new Bentley grille by Marston's, which eliminates rattles and saves money.
View original record Sg. from Rm. 1027 240 Rm3/R.12.2.37. BENTLEY SHUTTERS. Replying to Sg1/E11.2.37., the grille fitted to this car was made entirely by Marston's, and we understand the saving over the existing shutters…

scan0215 From Sg. to Gry. regarding Bentley Shutters and arranging a car viewing in London.
View original record 3.4.48. LDT. 240 S/W To Gry. from Sg. re Bentley Shutters. Sg2/E22.2.37 Referring to Rm3/R12.2.37 I am very much interested to note the information given. Rm. has not, however, replied on the point re…

scan0216 Proposal to standardise fixed dummy shutters on Bentley cars and design a new thermostatic by-pass system.
View original record Y 1027 DA. from Rm/Std. c. to Hs. 240 Rm/Std2/R.22.2.37. We think there is a strong possibility that we shall shortly be able to standardise fixed dummy shutters on Bentley cars in place of…

scan0217 Cooling tests for car 3.B.IV carried out at the Montlhery track.
View original record 240. To E. c. to Hs. c. to Da. Spare Rm/Std.4/AP.4.3.37. REPORT ON COOLING TESTS CARRIED OUT ON 3.B.IV. CAR AT THE MONTLHERY TRACK. Purpose of Tests. The tests which are described in this report were…

scan0218 Cooling system tests, comparing different radiator matrices and shutter grille designs for Bentley and Phantom III models.
View original record Rm/Std.4/AP.4.3.37. -2- Mk.VI. lightened construction matrix shows a gain in cooling over the standard 58 MM. Mk.V. - approximately 9% at both low and high speeds. (4) From tests 8, 9 and 10 it is…

scan0219 Summary table of test results measuring various temperatures for different radiator and engine configurations.
View original record SUMMARY OF TEST RESULTS TABLE DATA: COLUMN HEADERS: CONDITION OF TEST TOP WATER TEMP (RAD) BOTTOM WATER TEMP (RAD) TEMP AT REAR OF CYL. HEAD. AIR TEMP UNDER BONNET TEMP BEHIND FAN TEMP RISE ACROSS…

scan0220 Instructions for assembling two different Bentley radiator matrices for interchangeability tests at Brooklands.
View original record 240. To H.S. from Rm/Std. Rm/Std.23/AP.6.3.37. We shall shortly receive two Bentley radiator matrices which we will hand to you - one a 52 MM. Mk.Vl. the other a 58 MM. Mk.Vl. block, the latter being…

scan0221 Standardisation of a Calorstat spring for Bentley cars.
View original record RR 755B (10H) 88620 12-8-35 W, H, K. 21800 COMPLETED 10.3.37. BENTLEY STANDARDISATION of PARTS. Date 4.2.37. X No. 240. Drawing No. EB.3210. Description of Parts CALORSTAT SPRING. Origin To raise…

scan0222 Note regarding extra tool costs and the production start for the 'L' series chassis.
View original record Extra Tool cost Nil. Could be brought on to production at the 1st chassis in "L" Series. (Without Scrap.)

scan0223 Noticeable fault in the appearance of dummy shutters.
View original record HHS 240 To. Rm c. Rm/Std. c. Rm/GWH. HOTEL DE FRANCE. CHATEAUROUX. Indre. France. Rm/GWH/IMW/7/JAB. 18th March 1937. W.Reid Rm/SM 3. B. IV. DUMMY SHUTTERS. Regarding the appearance of the dummy…

scan0224 Instructions for the examination, rebuild, and further testing of a Bentley radiator unit.
View original record To HPS. from Rm/Std. Rm/Std.7/AP.20.4.37 BENTLEY RADIATOR We send you herewith a 58 MM. Mk.VI. matrix unit which we have used for Brooklands Tests. This radiator has had the bottom tank fixed to the…

scan0225 Dispatch of a Bentley Mk.VI radiator unit to John Marston & Co. for the fitment of special shutters.
View original record To D/BP. from Rm/Std. c. G/Mt. 240 Rm/Std.7/AP.28.4.37 We are today sending into the Central Stores one Bentley 58 MM, Mk.VI. radiator matrix unit fitted with a radiator shell and shutter support…

scan0226 Cooling system tests for a Bentley B.56.BN car at Brooklands race track.
View original record To E. from Rm/Std. c. By. c. Hs. c. Da. 240 Rm/Std.1/AP.5.5.37 REPORT ON COOLING TESTS CARRIED OUT ON B.56.BN. CAR AT BROOKLANDS. We recently carried out tests at Brooklands track on the above car to…

scan0227 Summary of cooling system specifications and standardisation for a Bentley car, including shutter openings and core types.
View original record -2- (3) Minimum shutter opening permissible with either 58 MM. or 52 MM. Mk.Vl. core is 54° - between the plane of the shutter and the matrix face. (4) The comparisons of the fans are given in…

scan0228 Results of cooling tests on a 4 1/4 Litre car at Brooklands.
View original record RESULTS OF COOLING TESTS ON B 56 BN CAR (STD. 4 1/4 LITRE) AT BROOKLANDS. AVERAGE OUTLET WATER TEMP - 70°C AVERAGE TEMP RISE ACROSS ENGINE (A) 30 M.P.H. - 11.1°C (B) FULL SPEED (APPROX.) - 10.7°C AV.…

scan0229 Water temperature regulator and thermostat casing for Bentley water connections.
View original record BY. c. Rm. c. HPS. 240 STD noted Rm/STD E/JNR.1/HP.10.5.37. Bentley Water Connections. Please receive herewith:- LeC.5655 showing the water temperature regulator for use with the fixed shuttered…

scan0230 Standardisation proposal for the water connections between the engine and radiator on the 25/30 HP Bentley chassis.
View original record RR 755B (10H) 26074 2-11-36 WHK 24999 COMPLETED 1.6.37. BENTLEY STANDARDISATION of PARTS. Date: 10.5.37 No. 240 Drawing No. Parts to be detailed as 25/30 H.P. Description of Parts: WATER CONNECTIONS…

scan0231 Estimated cost for new tools required for production of the 'M' Series chassis.
View original record BENTLEY STANDARDISATION OF PARTS Estimated cost of new Tools £2. 0. 0. Could be brought on to production at the 1st chassis in "M" Series (without scrap). TABLE HEADERS (mirrored): MATERIAL LABOUR…

scan0232 Standardisation of all water joint washers to be made in 'Klingerite' material instead of Dermatine.
View original record RR 755B (10H) 26074 2-11-36 WHK 24999 COMPLETED 1.6.37. BENTLEY STANDARDISATION of PARTS. Date 10.5.37 (Crossed out: 20.4.37) X No. 240. Drawing No. All water joint washers. Description of Parts ALL…

scan0233 Production note regarding nil extra tool cost for introducing a part to the 'M' Series chassis.
View original record BENTLEY STANDARDISATION of PARTS Date Extra Tool Cost Nil. Could be brought on to production at the 1st chassis in "M" Series (without scrap). TABLE HEADINGS: MATERIAL LABOUR CHARGES TOTAL REMARKS…

scan0234 Order and fitting instructions for a 58 MM. Mk.VI. Bentley radiator matrix.
View original record To HPS. from Rm/Std. Rm/Std.9/AP.17.6.37 We have ordered a 58 MM. Mk.VI. Bentley radiator matrix which is to be used for 6.B.1V. car. Will you please build this matrix up with standard top and bottom…

scan0235 Standardisation of dummy shutters and thermostat modifications for Bentley vehicles.
View original record To HPS. from Rm/Std. 240 Rm/Std.12/AP.23.6.37 We hope shortly to standardise Marston made dummy shutters on Bentley. This of course necessitates a water temper-ature controlling thermostat, and while…

scan0236 Development and testing of fixed radiator shutters for a Bentley.
View original record Sg. from Rm. c. Hs. c. E. 240 Rm16/R.25.6.37. BENTLEY WITH FIXED RADIATOR SHUTTERS. The Bentley with fixed radiator shutters is now available for inspection by Sales at any time. In addition to…

scan0237 Requesting for a Bentley with fixed radiator shutters to be sent for inspection.
View original record S/W. To Rm. from Sg. copy to Hs. (struck through) copy to E. (struck through) [Stamp]: HS JUN 29 1937 [Handwritten]: S G - Tues [Handwritten]: 240 Sg10/D28.6.37. Re: Bentley with Fixed Radiator…

scan0238 Delay and the availability of a Bentley with Fixed Radiator Shutters for a test drive.
View original record Sg. from Rm. 240 Rm8/R.2.7.37. re: Bentley with Fixed Radiator Shutters. Unfortunately, your Sg10/D.28.6.37. was delivered to the wrong department, and I have only just received it. The car will be…

scan0239 Requesting a Bentley with fixed radiator shutters be sent to London for inspection.
View original record S/W. To Rm. from Sg. 240 Sg12/D5.7.37. Re: Bentley with Fixed Radiator Shutters. I am in receipt of Rm8/R.2.7.37, and as it is more a question of seeing the car than trying it, I should like it sent…

scan0240 Sending a Bentley car to London with a new thermometer for a Phantom III model.
View original record Sg. from Rm. c. to Cx. 240 Rm2/R.6.7.37. Bentley with Fixed Radiator Shutters. Sg12/D5.7.37. We are sending this car down to London on Wednesday, July 7th, and with it the new thermometer for the…

scan0241 Inspection of a Bentley with fixed radiator shutters and its future availability.
View original record S/W. To Rm. from Sg. copy to Cx. 240 Sg16/D7.7.37. Re: Bentley with Fixed Radiator Shutters. Referring to former correspondence, we have seen this car and consider it is quite good. I gather from your…

scan0242 Confirming the approval of the Bentley radiator with fixed shutters and issuing a standardisation sheet for the M series.
View original record W/S - Sg. c. to Cx. c. to Hs. 240 Rm/Std.16/JH.8.7.37. Referring to Sg.16/D.7.7.37. we are pleased to note that you have approved the appearance of the Bentley radiator with fixed shutters. We are…

scan0243 Standardisation of a thermostat scheme for the Bentley M-series radiator.
View original record To By. from Rm/Std. 240 Rm/Std.15/AP.9.7.37 We are standardising the Bentley radiator with fixed shutters for M. series - this of course necessitates a thermostat scheme for controlling the water…

scan0244 Implementation of fixed radiator shutters for the Bentley 'M' Series chassis to save costs and eliminate rattling.
View original record [Handwritten]: STEADMAN. 240? See me. Rm Wlr Rm/STD Ru [Typed]: S/W To Rm/Std. from Sg. re Bentley Chassis Sg10/E16.7.37 [Struck through]: Copy to BY. [Underlined]: Fixed Radiator Shutters. Referring…

scan0245 Letter from John Marston Limited requesting parts to complete a sample Bentley Radiator.
View original record IMPERIAL CHEMICAL INDUSTRIES LIMITED. TELEPHONE: 21481 (4 LINES) TELEGRAMS: SUNBEAM, WOLVERHAMPTON. CODES: A.B.C. 5TH & 6TH EDITIONS; BENTLEY'S. Reply to be addressed to John Marston Limited for the…

scan0246 The dispatch of Bentley Radiator parts to John Marstons Ltd.
View original record To D/BP from HPS/CP G/Rb G/Mt Rm/Std 240 HPS/CP 1/CP 23.7.37 Holen Ru/SPD 0/54107 Bentley Radiator We hand you herewith , 1 EB 298 Filler 1 EB 1674 Housing } Assembled 1 EB 1675 Guard } 1 EB 1676…

scan0247 The introduction of Bentley Fixed Radiator Shutters on the 'M' Series chassis.
View original record To Sg. & Hs. From RHC. c. to By. c. to Fmn. 240 STD Re. Bentley Fixed Radiator Shutters. RHC.4/MJ.6.8.37. Wro / Rm/sm With reference to Sg.5/E.12.7.37 regarding the introduction of Bentley Fixed…

scan0248 New drawings and parts for the Bentley Chassis, specifically concerning fixed radiator shutters and associated components.
View original record To: [Struck through text] c. Rm/Std. Handwritten: Bentley Radiator Fde 240 hilenby S/D BY/CS1/EH.18.8.37. Re Bentley Chassis - Cylinder - Section 5050. Inlet Pipes - " 5070. Air Silencer - " 5082.…

scan0249 List of parts and amendments for vehicle sections including water connections, fan, radiator, and shutters.
View original record (2) Section 5160 cont'd. Remainder of parts to LOP. E.B.2706. Section 5190 - Water Connections. E.B.3399 Clip - Return Pipe E.B.3400 Water Pipe Connection E.B.3402 Water Pipe - Hotspot E.B.3403 " " -…

scan0250 Standardisation of a new radiator matrix to save weight and cost.
View original record BENTLEY STANDARDISATION of PARTS. COMPLETED 7.9.37. Description of Parts: RADIATOR MATRIX USING MARK VI CONSTRUCTION WITH .005" TINNED WATERWAY STRIP & .003 TINNED AIR-WAY STRIP (58 m.m. DEEP AS…

scan0251 Note on the nil extra tool cost for bringing a change into production on the 'M' Series chassis.
View original record UTILITY STANDARDISATION DEPARTS Extral Tool Cost - Nil. Could be brought on to production at the 1st. chassis in "M" Series (without scrap).

scan0252 Status of a Standardisation Sheet for Bentley Chassis fixed type radiator shutters.
View original record Rm/Std. c. BY/CS. 240 RHC/JMW.3/EMG.3.9.37. hlin Rm/STD Bentley Chassis - Fixed Type Radiator Shutters. With reference to memo' Rm/Std.14/AP.16.7.37 we would remind you that you promised to launch the…

scan0253 The issuance and costing of a Standardisation Sheet for Bentley fixed type shutters and thermostat.
View original record To RHC/JMW. from Rm/Std. 240 Rm/Std.14/AP.20.9.37 Referring to your RHC/JMW.3/EMG.3.9.37, we issued the necessary Standardisation Sheet for the Bentley fixed type shutters and thermostat on 1.9.37.…

scan0254 Blank 'Print Issue Sheet' form for requesting prints.
View original record PRINT ISSUE SHEET. PLEASE SUPPLY THE FOLLOWING PRINTS. To................... For Messrs............ .....................................................…

scan0255 Cooling system tests carried out at Brooklands on a car fitted with a Marston dummy shutter and thermostat.
View original record To By. from Rm/Std. c.c. Ds. c.c. Hs. c.c. MX. REPORT ON TESTS CARRIED OUT ON BROOKLANDS WITH G.B.1V. CAR FITTED WITH MARSTON MADE DUMMY SHUTTER ASSEMBLY AND THERMOSTAT SCHEME TO Rm.415 These tests…

scan0256 Summary report on the cooling system being standardised for the Bentley M. series.
View original record -2- Rm/Std.11/AP .20.9.37 SUMMARY The cooling system which we are standardising for Bentley for M. series is quite satisfactory as regards adequacy of cooling and temperature control. The operation,…

scan0257 Test results for the 6.B.IV. cooling system on the road and at Brooklands track.
View original record (1) RESULTS OF TEST ON 6.B.IV. COOLING SYSTEM ON ROAD AND BROOKLANDS TRACK. (a) During run to track. Mean water temp. (Outlet from engine) 81.5°C. Max. " " " 83°C. Min. " " " 80°C. Air Temp. 17°C. (b)…

scan0258 Faulty Bentley radiator from John Marston Ltd. requiring examination and repair.
View original record To HPS. from Rm/Std. t 240 Rm/Std.11/MH.30.9.37. We hand you herewith a Bentley Radiator which was contructed by Messrs. John Marston Ltd., as a unit to replace our standard radiator. Unfortunately,…

scan0259 Request to issue an official order to John Marston for work on fitting dummy shutters to a Bentley radiator.
View original record To Roy. from Rm/Std. c.c. G/WFH/CA. Rm/Std.4/AP.25.10.37. Re. G/WFH/CA.14/MV.22.10.37. Will you please send an official order to John Marston for work involved in fitting a set of dummy shutters to…

scan0260 Recalling a standardization sheet for a Bentley radiator and thermostat scheme due to failures with excessive water pressures.
View original record To By. c. to RHC. c. to Hs. 240 Rm/Std.10/JH.26.10.37. As discussed with you we are recalling the standardisation sheet issued for the Bentley radiator with dummy radiator shutters and thermostat…

scan0261 Potential standardisation of the Bentley Fixed Shutter Radiator.
View original record By. from Rm. Hs. 240 4 1328 Rm.1/AP.1.11.37. BENTLEY FIXED SHUTTER RADIATOR. The attached summary indicates the work we have been doing on radiators since J.B.1V. completed 15,000 miles. Owing to the…

scan0262 Brief summary of test results for four different thermostat schemes.
View original record 1.11.37. BRIEF SUMMARY OF THERMOSTAT SCHEMES TESTED. (1) LeC.3488 (3/8" bypass automatically cut-off at high water temps.) - scheme as fitted to original 15 Bentley cars for short period. Ran 15,000…

scan0263 Summary comparing three different engineering schemes based on cost, availability, and water pressure.
View original record -2- SUMMARY (1) LeC.3488 scheme run on J.B.1V. car because nothing else available at time. (2) Rm.415 scheme developed to save cost - approx. £1. cheaper than LeC.3488 scheme and utilise thermostat…

scan0264 Instruction to modify the upper valve bleed hole for the thermostat water temperature control on the Bentley k series.
View original record 240 To By.from Rm/Std. Rm/Std.8/MH.15.11.37. When instructing and detailing in accordance with the standardisation sheet for dummy shutters and bypass thermostat water temp. control to Lec.3488 and…

scan0265 Conditions to be observed by John Marston Ltd. when plating a Bentley radiator grille.
View original record Bentley Rad. File 240 Rm/Mr. Steadman. H1/EA.3/JN.29.11.37. Laboratory CONDITIONS TO BE OBSERVED BY JOHN MARSTON LTD., WHEN PLATING BENTLEY RADIATOR GRILLE. Noted by STD Nickel thickness to be a…

scan0266 Return of an incorrect Bentley Dummy shutter set to the manufacturer, John Marston Ltd.
View original record 1280 240 To Roy. Rm/Std.9/JH.15.12.37. We are today despatching to Messrs. John Marston Ltd. one Bentley Dummy shutter set which we received yesterday. This was ordered some time ago and has already…

scan0267 Letter to John Marston Ltd. detailing criticisms of a received Bently Dimmy shutter set.
View original record RM/Std.5/MH. 240 15th. December 1937. Messrs. John Marston Ltd., Wolverhampton. For the attention of Mr. Dunn. Dear Sirs, We have received from you the Bently Dimmy shutter set which we ordered some…

scan0268 Letter detailing multiple faults with a prototype shutter set, returning the item, and specifying requirements for production.
View original record -2- 15th. December 1937. not even filled with solder - the only attachment being about 1/16" of solder at the edge of the tab. (4) The rivetting of the shutter tabs to the top support plate has been…

scan0269 The design and manufacturing of radiator stiffeners and shutters for Bentley vehicles.
View original record -3- 15th. December 1937. The stiffener which they have drawn provisionally (print enclosed herewith) has the tabs sweated to the flat portions of the vanes and not to the turned over portions. In…

scan0270 Letter requesting a cost analysis for a radiator compared to a competitor's, and the results of a dissipation test.
View original record -4- 15th. December 1937. might come to, also you gave the writer an idea of the cost of another manufacturer's radiator, which is similar in some respects to our own, and which would be supplied in…

scan0271 Request to forward a Bentley radiator to Messrs. John Marston for use as a passing off rig for dummy shutter sets.
View original record To RHC. from Rm/Std. 240 Rm/Std.1/WH.15.1.38. Will you please arrange to forward as soon as possible to Messrs. John Marston one Bentley radiator complete less shutter assembly, so that they can use…

scan0272 Standard Bentley Radiator sent to Messrs. John Marston Ltd. for use as a passing off jig for dummy shutter sets.
View original record To D/BP. from Rm/Std. 240 Rm/Std.4/MH.29.1.38. On Wednesday, Jan. 26th. the writer took a standard Bentley Radiator, complete less shutters and controls, to Messrs. John Marston Ltd. This was left…

scan0273 Instruction to resolve a fitting issue with the Bentley II dummy shutter sets caused by a one-piece stiffener.
View original record To By. from Rm/Std. c. RHC. 240 BENTLEY II DUMMY SHUTTER SETS. You will recollect that it was decided to make the dummy shutter stiffener on B.II Radiator identical with that on B.III radiator (in…

scan0274 Standardisation and issues with B.II and B.III dummy shutter sets.
View original record 37 240 also H40 To By. from Rm/Std. c. RHC. c. Roy. c. D8. Rm/Std.1/MH.4.7.38. B.II AND B.III DUMMY SHUTTER SETS. When the B.II dummy shutter set was standardised for 'M'series production, an…

scan0275 Modifying drill jigs for a stiffener to achieve a specific gap for an approximate cost of £8.
View original record -2- Rm/Std.1/MH.4.7.38. It now transpires that the stiffener has been detailed for a .436 centre gap - the only alterations necessary on B.II to get the same gap are modified drill jigs for shutter…

scan0276 Design and required schemes for the front end of the Bentley 6.
View original record Mr Hall Radiator SECRET. To Rm. from Ev. c. to Rm/HH. Ev.1/JH.28.9.40. re Bentley 6 - Front End. We have already sent you the Rationalised radiator PL.236 for the Bentley 6. It will be appreciated…

scan0277 1/16 scale design of the Bentley 6 car and related drawing plans.
View original record SECRET To Rm from Ev or to HH V.H I.V/H.L.68.4.30 Cont'd. On PL.354 (original sent to Rm/HH) we shew a 1/16 design of the Bentley 6 car. At the moment neither PL.353 or PL.354 call for any design or…

scan0278 Blueprints and the fitting of an A.C. Steam Valve to a B.V. Radiator.
View original record To Rm. from Rm/HH. To Rm/Wgm. [Crossed out] c. Rm/GHS. [Handwritten annotations start] Rm/ to Wgm. Rm This job is being made and fitted to 10 BV Radiators [Signature] GMD 11-12-40 24° [Handwritten…

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