Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Standardisation proposal for a new fan with duralumin flanges and blades to reduce weight. | ||
| View original record | RR 785 REVISED (10H) (DE444 6-10-26) BM. X7220 COMPLETED 18.10.26 STANDARDISATION of CHASSIS PARTS. Description of Parts. FAN WITH DURALUMIN FLANGES AND BLADES. Origin. To reduce weight. Experimental… | ||
| Scan002 | Standardising the 40/50 HP Chassis fan with Duralumin flanges and blades following failures of the steel version. | ||
| View original record | BY/CS. c. to Hs. X7220 BY/Cgh33/G.23.11.26. 40/50 HP. CHASSIS - FAN The standardisation sheet X.7220 of the 23.9.26 has been signed up in connection with the fan with Duralumin flanges and blades. In… | ||
| Scan003 | Outstanding work on a car, specifically the steering, rear brake drums, and an experimental fan fitting. | ||
| View original record | To DA. from Hs/Rm. [Handwritten, crossed out] X7220 [Handwritten, crossed out] X7770 [Handwritten] X7220 X7430 Hs/Rm1/LG14.5.27. EAC-7. The outstanding portions of this car which require attention are… | ||
| Scan004 | Confirming a drawing for a Top Water Pipe and Fan has been attached. | ||
| View original record | BY. from E. c. to BJ. Hs. 47220 E1/M9.6.28. EAC.10 TOP WATER PIPE AND FAN. X.7180 X.7220 Please find attached the above drg. LeC. 2563 E. | ||
| Scan005 | Fan noise on the Phantom Chassis G2B series and the results of tests to resolve it. | ||
| View original record | To BY. From Hs.GWH. Hs/GWH/LG17.8.28. X7220 PHANTOM CHASSIS. X7220 X7250 On G2B. series, the engine is pushed forward, bringing the fan .500" nearer to the matrix of the radiator. This produces an… | ||
| Scan006 | Clearance of the 'SS' radiator and fan and a modification to the starting handle bracket. | ||
| View original record | BY. from DA. c. to BJ. Hs. X7220 DA2/M18.10.28. 'SS' RADIATOR & FAN. X.615 X.7250 X.7220 Replying to BY/CGH4/G15.10.28., though we do not remember the experimental report limiting the closeness of the… | ||
| Scan007 | Noting that if the 'SS' fan belt stretches it can foul controls, proposing the fan be dropped lower. | ||
| View original record | To BY. from Hs. c. to E. X7220 Hs2/LG5. 3. 29. FAN ON 'SS'. X7250 It has been noticed that if the fan belt stretches too much, the fan will foul the radiator shutter controls, also the blades are very… | ||
| Scan008 | Drawings and parts for an 'India 4' Fan with Phantom Shaped Blades. | ||
| View original record | c. to Hs/Rm. 77220 BY/CS2/DB.10.5.29. Re India 4. Fan. (With Phantom Shaped Blades). Sec:5220. Please receive herewith prints of each of the following drawings, detailed to scheme 1151, in accordance… | ||
| Scan009 | Request to investigate increasing the J.2 series fan diameter to improve the radiator system's cooling capacity. | ||
| View original record | BY/CS. c. Hs. X7220 BY11/G.27.5.29. J.2 SERIES - FAN. ----------------- Will you please look into the possibility of increasing the diameter of the fan, in order to increase the cooling capacity of… | ||
| Scan010 | Brooklands tests of a car's cooling system in response to overheating complaints with the Phantom II model. | ||
| View original record | To R. from Hs/Rm. c. SE. Wor. c. Da. E. c. By. Rg. c. Lr. X.7200 Hs/Sal/MJ25.6.30. BROOKLANDS TESTS JUNE 17th to 20th 1930. X.788 X.756 X.7280 X.7260 X.7220 X.7731 X.7772. We took 13-EX car to… | ||
| Scan011 | Vehicle cooling system tests, focusing on ventilation and bonnet shutters to prevent overheating. | ||
| View original record | Hs/ml/W25.6.30. contd. -2- it. Therefore, in order to establish a basis of comparison for all conditions, the car was driven at a constant speed of 62 M.P.H. round the track until the heat dissipated… | ||
| Scan012 | Engine cooling issues, recommending ventilated bonnets for cars in hot climates and discussing radiator performance. | ||
| View original record | Hs/Rul/M125. 6.30 contd. -3- We think that it is essential to fit ventilated bonnets to cars going to hot climates because the critical atmospheric temperatures at which the car will boil is certainly… | ||
| Scan013 | Track testing, detailing oil temperature issues, petrol supply problems, and recorded lap speeds for various cars. | ||
| View original record | -4- reaches is rather excessive (Graph (4). We have recorded temperatures as high as 110°C. after a prolonged burst of speed on the track with atmospheric temperatures of only 20°C. As the ignition… | ||
| Scan014 | Performance tests on cars 18-EX and 19-XX, identifying the causes for the 'American car's' slow speed and noting a cylinder head failure during testing. | ||
| View original record | Hs/Rml/4125.6.30 contd. -5- might be worth certification by the track authorities for sales propaganda. We traced the inferior performance of 18-EX to a tighter engine by allowing the cars to come to… | ||
| Scan015 | Test report on radiator and water circulation performance, including a comparison with an American Phantom II. | ||
| View original record | HS/Aml/MI25.6.30 contd. -6- the tests, and ascertained that it was subjected to the correct tension. We compared the radiator temperature in this condition with the fan belt tightened choc a bloc and… | ||
| Scan016 | Summary of findings and proposed developments for the Phantom II concerning bonnet ventilation, fan efficiency, and radiator design. | ||
| View original record | -7- advance or fan, but we are confident that it will be up to standard on the present 10,000 milestest. SUMMARY. Bonnet Ventilation. Phantom II requires as much ventilation as we can give it, as the… | ||
| Scan017 | The necessity of ventilated and louvered bonnets for cooling on high-speed Continental roads. | ||
| View original record | HS/RM/MJ25.6.30 contd. -8- special motor roads, all encourage high speeds. We know of no big car used on the Continent that does not fit ventilated bonnets. Therefore, w while we are better off for… | ||
| Scan018 | Graph showing the temperature of top water, bottom water, and oil against miles run. | ||
| View original record | GRAPH I TEMP. C° 90° 80° 70° 60° MILES RUN 5 10 15 20 TOP WATER OIL BOTTOM WATER 19 E.X. 14 x 52 AXLE. 62 M.P.H. 6m/m 7 1/2 m/m RAD. NO BONNET VENTILATION. ATS TEMP. 24°C. | ||
| Scan019 | Blank document page with a purple ink date stamp from Derby. | ||
| View original record | TEL 2 JUL 1930 DERBY. | ||
| Scan020 | Graph comparing car overheating temperatures under various bonnet and undershield ventilation configurations. | ||
| View original record | GRAPH II STANDARD P.II CABRIOLET 19 E.X. AXLE RATIO 14 x 52 WT. 48 CWT EMPTY. TEMP AT WHICH CAR WILL OVER-HEAT EVENTUALLY (100°C - TOP WATER TEMP) TEMP SCALE: 10°C, 20°C, 30°C, 40°C, 50°C TEST… | ||
| Scan021 | Graph showing top and bottom water temperatures under various bonnet configurations at 62 MPH. | ||
| View original record | GRAPH III. STANDARD. REAR BONNET SHUTTERS OPEN. FRONT UNDERSHIELD OFF. FRONT BONNET SHUTTERS OPEN. ALL SHUTTERS OPEN. LOUVRED BONNET. LOUVRED BONNET FRONT FAN OFF. TOP WATER TEMP. BOTTOM WATER TEMP.… | ||
| Scan022 | Graph plotting oil and top water temperature against miles run under various speed and cooling settings. | ||
| View original record | GRAPH IV TEMP C° 100° 90° 80° 70° MILES RUN 25 30 35 62 M.P.H. C.O. CLOSED ATS TEMP 20°C CAR OPENED FULL OUT C.O. OPEN 83 M.P.H. OIL TEMP TOP WATER VENTILATED UNDERSHIELD ALL BONNET SHUTTERS OPEN | ||
| Scan023 | Graph comparing critical atmospheric temperature for spring-tensioned versus positively tensioned fan belts at 62 MPH. | ||
| View original record | GRAPH V. 19 E.X. 62 M.P.H. NO BONNET VENTILATION COMPARISON OF SPRING TENSIONED FAN AND FAN BELT TENSIONED POSITIVELY. CRITICAL ATS TEMP 10°C 20°C 30°C 40°C SPRING TENSIONED 40.5 BELT TIGHTENED Choc à… | ||
| Scan024 | Graph comparing the top water temperatures of models 19 E.X. and 18 E.X. during a test run. | ||
| View original record | GRAPH VI. TOP WATER TEMP °C MILES RUN. OPENED UP TO FULL THROTTLE. 18 E.X. 19 E.X. COMPARISON OF 19 E.X. AND 18 E.X. 6m/m 7 1/2m/m RAD. 62 M.P.H. TOP WATER TEMP. No BONNET VENTILATION. ATB TEMP 24°C. | ||
| Scan025 | Blueprint diagram illustrating a modification to a front undershield to improve the cooling system. | ||
| View original record | MODIFICATION TO IMPROVE COOLING SYSTEM. CUT AWAY FRONT UNDERSHIELD STANDARD FRONT UNDERSHIELD | ||
| Scan026 | Cover page with extremely faint, illegible text and a purple date stamp. | ||
| View original record | Illegible faded text. Stamp: [illegible], LIMITED [illegible] ROOM. 2 JUL 1930 DERBY. | ||
| Scan027 | Recommendations for resolving over-heating issues on a Phantom II, including fan belt adjustment and undershield removal. | ||
| View original record | Repair Dept. From Hs/Rm. X7220. Hs/Rm.2/WJ.27.6.30. X4117 X7220. X7260. With further reference to the over-heating trouble reported on 117-WJ. We make the following recommendations in this case - (1)… | ||
| Scan028 | To a client in France with troubleshooting advice for shock absorber pressure and high engine temperatures. | ||
| View original record | G.W.Hancock, Esq., Hotel De France, Chateauroux, Indre, FRANCE. X7220. K7941d. To GWH. From Hs/Rm. Hs/Rm.1/MJ.5.7.30. With reference to your note re. the shock absorbers building up a pressure… | ||
| Scan029 | Second report on radiator and fuel supply tests conducted at Brooklands. | ||
| View original record | To R. From Hs/Rm. c. Sg. Wor. c. Ds. E. c. By. Rg. c. Lr. X7220. Hs/Rml/MJ9.7.30. X.788 X.766 X.7250 X.7260 X.7220 X.7771 X.7510 X.7772 BROOKLANDS RADIATOR TESTS. SECOND REPORT. We carried out a… | ||
| Scan030 | Analysis of fuel supply issues related to vacuum pump efficiency and high temperatures. | ||
| View original record | -2- temperature of the air intake to the carburetter. With an atmospheric temperature of 24°C. the air intake reached 50°C. at 75 M.P.H. As soon as the car was stopped this temperature exceeded 60°C.… | ||
| Scan031 | Technical report on cooling system fan belt performance and mixture strength analysis. | ||
| View original record | -3- by such leaks in service has been brought to our notice. COOLING SYSTEM - FAN - We confirmed our previous result that the standard spring loaded whittle belt is incapable of driving the fan… | ||
| Scan032 | Engine pre-ignition, overheating, fuel supply, and radiator performance comparisons. | ||
| View original record | -4- HS/RML/WJ9.7.30 contd. pre-ignition and over-heating. The simplest way of overcoming this is to run on the reserve. This trebles the period of full throttle work before shortage takes place. The… | ||
| Scan033 | Engine cooling circulation tests and the increase of water temperature with vehicle speed. | ||
| View original record | -5- Hs/Rml/MJ9.7.30 contd. CIRCULATION. We conducted tests on the track restricting the circulation until the system lost efficiency to the extent of about 2°C. top water temperature. The flow under… | ||
| Scan034 | Car overheating issues, discussing the effects of driving conditions, fans, and tyres on the cooling system. | ||
| View original record | -6- efficient fan, a rich mixture and a ventilated bonnet the car should not over-heat at air temperatures below 35°C. when driven all out continuously in still air, and if driven at 75 M.P.H.… | ||
| Scan035 | Recommendations for improvements to the vehicle's cooling and fuel systems, including the fan belt, autovac, radiator and fuel supply. | ||
| View original record | -7- Our recommendations for improvement are - (1) Improved fan belt. Standardisation sheet circulated. We are so dependent on this that we think the drive might receive design consideration. (2)… | ||
| Scan036 | Graph and bar chart illustrating the effects of the fan, speed, and ventilation on the engine cooling system. | ||
| View original record | GRAPH I EFFECT OF FAN ON COOLING SYSTEM. BROOKLANDS TEST 2ND JULY 1930 TEMPERATURE °C NO FAN STANDARD SPRING TENSIONED WHITTLE BELT. WHITTLE BELT TIGHTENED CHOC À BLOC. BELT CHOC À BLOC AND FAN 1"… | ||
| Scan037 | Blank document with a date stamp from the print room. | ||
| View original record | ROLLS-ROYCE, Limited PRINT ROOM 12 JUL 1930 DERBY. | ||
| Scan038 | Graphs showing the effect of water circulation on overheating for a 19 E.X. Car water system. | ||
| View original record | GRAPH II EFFECT OF CIRCULATION ON OVERHEATING 19 E.X. CAR A BACK PRESS CAUSED BY RESTRICTION 15 LBS/SQ" WATER OUTLET FROM THE CYL: BLOCK RESTRICTED TO 23-.125 HOLES. TOP WATER TEMP. ATS TEMP. 20°C… | ||
| Scan039 | Graph plotting top and bottom water temperatures against a series of seven different engine and cooling test conditions. | ||
| View original record | GRAPH II TEMPERATURE °C 90, 85, 80, 75, 70, 65, 60 TOP WATER TEMP BOTTOM WATER TEMP DATA POINTS: ① FULL WEAK NO FAN. ② AS ① BUT MIXTURE NORMAL NO FAN. ③ AS ② BUT FAN SPRING LOADED ④ AS ③ BUT FAN BELT… | ||
| Scan040 | Graph showing the effect of temperature on complete car circulation. | ||
| View original record | GRAPH IV EFFECT OF TEMP. ON COMPLETE CAR CIRCULATION. RADIATOR E. 79951 CIRCULATION GAL/MIN DEPRESSION SUCTION SIDE OF PUMP INS. HG. FLOW GAL/MIN DEPRESSION ON SUCTION SIDE OF THE PUMP INS HG 2500… | ||
| Scan041 | From the Print Room marked with a date stamp. | ||
| View original record | ROLLS-ROYCE LTD PRINT ROOM 12 JUL 1930 DERBY. | ||
| Scan042 | Car cooling issues, fan tests, and proposed improvements to the fan belt. | ||
| View original record | C. W. Hancock, Esq., Hotel de France, Chateauroux, Indre, FRANCE. Handwritten notes: X7220. Y766 Y7220. To GWH. From Hs/Rm. We are in receipt of your note of the 7th. inst., and note your remarks re… | ||
| Scan043 | Follow-up letter discussing temperature readings, cooling system performance, water loss, and potential remedies for detonations. | ||
| View original record | -2- Hs/m.S/WL.9.7.30.Contd. We want you to be very careful to make it clear how maximum temperatures which you record in your Daily Reports are obtained. We note in the Daily Report 7.7.30, that you… | ||
| Scan044 | Technical letter discussing overheating issues, brake linings, and requesting cooling system temperature data. | ||
| View original record | -3- We should like you to make sure that the ignition setting is the best for the cool running of the car. We presume that during your trouble with the valve taking up its clearance the car was never… | ||
| Scan045 | Continuation page of a document discussing atmospheric temperatures and centre point lubrication. | ||
| View original record | -4- Hs/Bn.3/AH.9.7.30.Contd. atmospheric temperatures from 15° to 30°C. it would be very valuable information. We note your remarks re the centre point lubrication. Hs/Bn. | ||
| Scan046 | Experimental variations and road tests for the Phantom radiator fan. | ||
| View original record | Hs/Rm. from EFC. X7220. RECEIVED JUL 18 1930 EFC4/ADL8.7.30. X.1017. PHANTOM RADIATOR FAN. With reference to your enquiry re fan, it will be seen from our EFC3/T20.3.25 that an experimental fan… | ||
| Scan047 | Overheating issues and proposing to increase the 40/50 fan speed via a double pulley drive. | ||
| View original record | COPY. x7220 To By. From Hs/Rn. Hs/Rn.7/AD.13.8.30. 40/50 FAN. X.766. X.7220. X.196. On our recent cooling tests we have proved that the greatest factor in keeping the car cool is the fan. The new… | ||
| Scan048 | Overheating issues on the Phantom II model and proposing three modifications. | ||
| View original record | X7220 To Hs. from Sg. C. Wor. C. PN. C. H. EP. MX. Hd. BY. Sg3/E4.9.30. X. 766 X. 3875 X.1085 X. 8220 X. 196 OVERHEATING - PHANTOM II I have read with interest the contents of Hs/Rml/AD2. 9.30 and I… | ||
| Scan049 | Ongoing tests on a Phantom II for overheating, specifically investigating the undershields. | ||
| View original record | X7220. Hs.4/MJ.8.9.30. To Sg. From Hg. c.c. to Wor. c.c. to C. c.c. to PM. c.c. to H. c.c. to MK. c.c. to EP. c.c. to Hd. c.c. to Sy. X.766. X.3875. X.1085. X.7220. X.196. OVERHEATING - PHANTOM II.… | ||
| Scan050 | Standardisation of a Goodrich endless canvas rubber fan belt to improve cooling system efficiency. | ||
| View original record | RR 788 REVISED (10H) (DG 348 19-7-29) SM. 6/643. COMPLETED 18.9.30. X7220 STANDARDISATION of CHASSIS PARTS. Date: 11.7.30. Description of Parts: GOODRICH ENDLESS CANVAS RUBBER FAN BELT. Origin: To… | ||
| Scan051 | Modifications to the 20/25 fan drive to accommodate a deeper radiator. | ||
| View original record | X7220 BY. FROM E+ E2/M13.6.31. C. to SG. WOR. HS. 20/25 - FAN DRIVE TO SUIT DEEPER RADIATOR. We send herewith Lec. 3921. shewing the above. This drawing has been traced from your scheme No.1491, and… | ||
| Scan052 | Request for two new, stronger fan pulley springs for Diamond mounted cars. | ||
| View original record | R.H.C. FROM Hs/Les. 87220. Hs/Les.6/MA.7.12.31. FAN PULLEY SPRINGS PII. Owing to the fact that the fan belt is hitting the brackets on the wheel case on Diamond mounted cars, will you please make two… | ||
| Scan053 | The reduction of fan size on Phantom II cars after fitting a 'film' radiator. | ||
| View original record | X 7220 E. from Hs/Rn. c. to RHC. Hs/Rm.3/KT.21.3.33. P.II. FAN. ------------ Now that we have a 'film' radiator, we can certainly reduce the fan size on all P.II. cars so fitted. We suggest the 25 HP.… | ||
| Scan054 | Requesting parts for cooling experiments on the Phantom II model. | ||
| View original record | X722 To RHC. From Hs/Lid. Hs/Lid.5/KT.23.11.33. P.II. COOLING EXPERIMENTS. Will you please have the following parts made for cooling experiments on P.II. in conjunction with the new narrow Harrison… | ||
| Scan055 | Drawing of a PII Fan Pulley, noting it is .500' smaller in diameter. | ||
| View original record | PII - FAN PULLEY, .500" SMALLER IN DIAM., Hs. 1215., 6.00" DIA, 4.30" DIA, OTHER DIMENSIONS AS ON E.82275., ROLLS-ROYCE, LTD., PRINT ROOM, NOV 22 1933 | ||
| Scan056 | Two silent fan designs, LeC.3747 and LeC.3748, for trial on a 10,000 miles test car. | ||
| View original record | X 7220 - Wyman file To BY. from E/JNR. c. Hs. NHC re P.2. Silent Fan. We send you herewith two designs of Fan - LeC.3747 and LeC.3748. Both of these fans should be made and tried and the better one of… | ||
| Scan057 | Urgent memo cancelling two Phantom II fan designs and submitting a revised design using Dural for the blades. | ||
| View original record | X7220 URGENT. To BY. from E/JNR. E/JNR.1/HP.15.1.34. c. Ms. RHC. re P.II Silent Fan. In view of the failure of the Bentley fan, we wish to cancel our design LeC.3747 and LeC.3748 for the Phantom II… | ||
| Scan058 | Requesting the design and construction of a variable pitch fan for the Phantom II. | ||
| View original record | X7220 RHC. From Hs/Std. Ha/Std.4/MA.21.6.34. VARIABLE PITCH FAN FOR PHANTOM. We wish to test a variable pitch fan for Phantom II, similar to the American type fan which we handed you for examination… | ||
| Scan059 | Tests carried out on fans and a Vulture radiator at Brooklands. | ||
| View original record | X7220 To E. from Hs/Std. Hs/Std.14/KW.3.7.34. Report on Tests Carried out on Fans and Radiator (Vulture) at Brooklands 26.6.34. The parts tested were a Vulture radiator and three different fans, the… | ||
| Scan060 | Radiator performance test results under various driving conditions. | ||
| View original record | -2- Hs/Std.14/KW.3.7.34. Radiator Results. (1) 30 M.P.H. Full Throttle. Maintained Water Temp. oC. Bonnet Air Temp. (Actual) Top Bottom Mean Louvres Open 51.5 39.0 45.3 35 Louvres closed 55.5 41.5… | ||
| Scan061 | Test data sheet comparing cooling performance for various fan configurations at 30 MPH and 60 MPH. | ||
| View original record | -3- Hs/Std.14/KW.3.7.34. FANS. (1) 30 M.P.H. Full Throttle - Bonnet Shutters closed. Maintained Water Temp. oC. Bonnet Air Temp. (Actual) Top Bottom Mean No Fan 61 49 55 22 59 Std. Fan 50 39 44.5 23… | ||
| Scan062 | Conclusions on radiator tests, comparing heat dissipation and matrix area for Vulture and Spectre engines. | ||
| View original record | -4- Hs/Std.14/KW.3.7.34. CONCLUSIONS. Radiator. From above tests it is seen that the Vulture radiator matrix is adequate for dealing with the water heat to be dissipated from the Vulture engine. Below… | ||
| Scan063 | Comparison of cooling efficiency and noise levels for different fan designs against a standard model. | ||
| View original record | -5- Hs/Std.14/KW.3.7.34. Fans. The staggered bladed fan to LeC.3766 is equal in cooling efficiency to the standard Ph.II fan and definitely quieter. The American variable pitch fan tested is more… | ||
| Scan064 | Graph charting the results of Phantom fan tests conducted at Brooklands Track. | ||
| View original record | PHANTOM FAN TESTS AT BROOKLANDS TRACK JUNE 26 1934 AIR TEMP TO BOIL 65 60 55 50 45 40 35 AMERICAN V.P FAN STAGGERED L.E.C. 3166 FAN STANDARD P.II FAN NO FAN OLD STANDARD TUBE RADIATOR NO FRONT… | ||
| Scan065 | Graph showing results of Vulture radiator tests at Brooklands Track. | ||
| View original record | VULTURE RADIATOR TESTS AT BROOKLANDS TRACK JUNE 26. 1934 AIR TEMP. TO BOIL °C LOUVRES OPEN LOUVRES CLOSED M.P.H. 70 60 50 45 40 30 FULL THROTTLE 45 FULL THROTTLE 60 CRUISING 75 90 FULL THROTTLE C.S.S… | ||
| Scan066 | Request to modify flexible fan blades and build them onto a hub for a 10,000-mile trial on a Phantom 28-EX. | ||
| View original record | x7220 RHC. From Hs/Std. Hs/Std.2/MA.16.7.34. We send you herewith a set of four flexible fan blades and a modified American Variable Pitch fan. Will you please modify the shape of these blades and… | ||
| Scan067 | Report comparing two modified Phantom fans against a standard fan for power loss, noise, and cooling efficiency. | ||
| View original record | To E. X7220 Hs/Std.6/KW.13.9.34. Report on Phantom Fans to LeC.3747 & LeC.3748. These two fans have a modified blade shape and construction - one has four symmetrically placed blades, the other has… | ||
| Scan068 | Comparison document on the efficiency and performance of different cooling fans, including standard and staggered bladed types. | ||
| View original record | -2- Hs/Std.6/KW.13.9.34. (3) From the attached curves it is seen that the standard fan is slightly more efficient than either of the other fans from a cooling standpoint, the two LeC. fans being… | ||
| Scan069 | Graph comparing the cooling efficiencies of different Phantom fans. | ||
| View original record | COMPARISON OF COOLING EFFICIENCIES OF PHANTOM FANS TOP TANK WATER TEMP. °C ENGINE IDLING IGNITION FULL RETARD SHUTTERS FULL OPEN ASYMMETRICALLY BLADED FAN Lec: 3748 SYMMETRICALLY BLADED FAN Lec: 3747… | ||
| Scan070 | Blank page with a 'Print Room' stamp. | ||
| View original record | ROLLS-ROYCE, LTD PRINT ROOM 13 SEP 1934 H. 204 | ||
| Scan071 | Graph comparing power losses for different Phantom fan configurations against engine RPM. | ||
| View original record | POWER LOSSES WITH PHANTOM FANS LEGEND: (1) - SYM FAN - LFC (2) - ASYM FAN - LFC (STAGGERED BLADES) (3) - PRESENT STANDARD PHANTOM FAN Y-AXIS: POWER LOSS IN DRIVING FAN (B.H.P.) X-AXIS: R.P.M. (ENGINE)… | ||
| Scan072 | Blank page stamped by the print room in Derby. | ||
| View original record | ROLLS-ROYCE, LTD PRINT ROOM 18 SEP 1931 DERBY. | ||