From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Standardisation of a thermostat with 1.500' diameter bellows and 1.281' diameter valve seat for a Bentley.
| Identifier | ExFiles\Box 171\5\ img059 | |
| Date | 2nd September 1938 | |
| RR 755B (10H) (49968) 19/10/37 C.E.Co. COMPLETED 24.11.38. BENTLEY STANDARDISATION OF PARTS Date Issued: 2.9.38. Sheet No.: B.16. Drg. No.: L.O.P.S. Description: THERMOSTAT WITH 1.500" DIA. BELLOWS & 1.281" DIA. VALVE SEAT. Purpose: To reduce oscillations of bellows due to water pressure fluctuations and prevent consequent fatigue and noise in case of a car fitted with car heater. Brief Report and Remarks: Effects of the above changes in bellows and valve size have been reported on in Rm{William Robotham - Chief Engineer}/td.1/RH.{R. Hollingworth}10.5.38. and Rm{William Robotham - Chief Engineer}/td.2/RH.{R. Hollingworth}16.5.38. Since that time, thermostats of this type have covered approx. 4,000 miles on O.B.M. exptl. car and approx. 7,000 miles on Lp{Mr Lappin}'s. car S.O.M. and have proved satisfactory. When recommended for Introduction: IMMEDIATELY PRESENT STOCK OF EB.3309 UNITS IS USED UP. Report References: Rm{William Robotham - Chief Engineer}/td.1/RH.{R. Hollingworth}10.5.38. Rm{William Robotham - Chief Engineer}/td.2/RH.{R. Hollingworth}16.5.38. By: Rm{William Robotham - Chief Engineer} Da{Bernard Day - Chassis Design} Mx{John H Maddocks - Chief Proving Officer} By.{R.W. Bailey - Chief Engineer} Rm.{William Robotham - Chief Engineer} Da.{Bernard Day - Chassis Design} Mx.{John H Maddocks - Chief Proving Officer} Old Parts - Material: Labour: Burden: Total: New Parts - Material: Labour: Burden: Total: Increase in Cost £: NEGLIGIBLE Decrease in Cost £: O/sh. 30.9.38. Production Position and Comments: Cost of Tools £: NIL. Introduction of the Thermostat with the modified bellows and valve seat to reduce oscillations and hammering can be effected at the 101st. chassis in 'M' series, i.e. when the present stock of EB.3309 units is exhausted. There will be rendered scrap 93 upper valves EB.680 valued £2.13.0d. There will be no tool cost and chassis factory cost will not be affected by the change. RHC.{R. H. Coverley - Production Engineer} Authorisation to Proceed. Signature: Sg.{Arthur F. Sidgreaves - MD} Fg. Date: 22.11.38. Signature: Hs.{Lord Ernest Hives - Chair} Hm.{Capt. W. Hallam - Head Repairs} Date: 22.11.38. Introduce on the 101 Chassis in M Series. | ||