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 water pump with modified provision for end thrust, using Ferobestos material to reduce wear.
| Identifier | ExFiles\Box 171\5\ img068 | |
| Date | 15th November 1938 | |
| RR 755A (10H) (49968) 19/10/37 C.E.Co. ✓COMPLETED 13.1.39. 25/30.H.P.xx STANDARDISATION OF PARTS Date Issued 15.11.38. Sheet No. W.8. Drg. No. L.O.P.S. Description: WATER PUMP WITH MODIFIED PROVISION FOR END THRUST. THRUST BUSH AND THRUST PAD BEING IN FEROBESTOS N.W.1 MATERIAL. Purpose: To reduce wear of thrust plug and thrust bush which permits rotor to foul case or cover of pump Brief Report and Remarks: A pump of this type was run 20 hours at 2,000 R.P.M. and 15 hours at 4,000 r.p.m. on test rig - no wear was evident. Since pump was fitted to 8.B.V. car and ran 15,000 miles satisfactorily in France. On stripping and examining same it was found that end plug had increased from .006 - .011 indicating only .005 wear - this had all taken place on Ferobestos tail thrust pad. Last pump to complete 15,000 miles (26.G.VI) had approx. .030 wear on thrust bush and button. When recommended for Introduction: If possible 2nd. half B series if not, 1st. chassis in C series Report References: 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: £0.2.8. Labour: £0.5.6. Burden: £0.9.8. Total: £0.17.10 New Parts Material: £0.4.6. Labour: £0.5.2. Burden: £0.9.1. Total: £0.18.9 Increase in Cost £ 0.0.11. G R F 29/11/38 Cost of Tools £ 4.10.0. Production Position and Comments: Water pump with thrust bush and thrust pad in Ferobestos N.W.1. material to reduce wear can be introduced at the 1st. chassis in 'C' series without scrap. A tool cost of £4.10.0d. is involved whilst there is an increase in factory cost of 11d. per chassis. RHC.{R. H. Coverley - Production Engineer} Authorisation to Proceed. Introduce on the 1 Chassis in C Series. Sg.{Arthur F. Sidgreaves - MD} Signature Date 9/1/39 Hs.{Lord Ernest Hives - Chair} Signature Date 9/1/39 | ||