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 document for replacing the old pressure feed pump (G.2373) with a new limited compression type (E.5935).
| Identifier | ExFiles\Box 171\3\ img001 | |
| Date | 11th January 1916 | |
| R.R. 755 (5 H) (S.A. 925. 25-2-15) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 0061. ORIGINAL STANDARDISATION of CHASSIS PARTS. Description of Parts. Pressure Feed Pump located on the governor casing of the engine, the pump being of the limited compression type driven by an eccentric on the governor shaft. Box 1: X 1752. Box 2: Drawing No. G.2373(old type No. E.5935(new Box 3: Part G.2373. List. E.5935/6. Origin. The necessity for removing the present pressure feed pump from the gear box, owing to the introduction of the self starter. The change in the type of pump from 20 lbs max. compression pressure to 2 1/2 lbs max. compression pressure on the actual petrol tank was made owing to a desire to eliminate the leakage of the blow off valve. Experimental Test Report. Road Test Report. One of these pumps has run for 5 months on chassis 58NA{Mr Nadin}, during which time it has done between 5000 & 6000 miles. Another has done 2500 miles on 7 CA and there is a further pump fitted to chassis 49GB recently delivered to Mr. Royce. We have never known of a failure with any of these pumps. They take a long time to build up the pressure but it is only what one would expect from a low compression pump. The pieces on examination are not worn, and are well oiled. The objections we have to the present type are relief valves and noisy automatic valves. Signature of Exp. Dept. that above is correct. E.{Mr Elliott - Chief Engineer} Hives Weight of Old Part. G.2373 5 lbs. Cost of Old Part. £ 4--1--8 Weight of New Part. E.5935 3.250 lbs. Cost of New Part. £ 3--6--2 Difference per Car. decrease 1.750 lbs Difference per Car. £ 15--6 decrease. Cost of Parts in Works and Stores which will be scrapped if commenced on:- Series "H" £10-5-0 Series "J" £ 0 Storekeeper advised re above. Storekeeper's Signature. Signature of Mr. DeLOOZE that above is correct. (A) (B) & (C). D.{John DeLooze - Company Secretary} SIGNATURES Mr. JOHNSON. 13.1.16. C.Johnson. Mr. ROYCE. 11.1.16. This cancels some parts which are unsatisfactory & make some slight noise the saving is more than shewn above as there is no relief valve. Fit to series J & to part of H if it can be done without loss. R.{Sir Henry Royce} Mr. WORMALD. 17.1.16. (Agreed.Wor{Arthur Wormald - General Works Manager}) Mr. NADIN. 13.1.16. In view of the small output I suggest completing 10,000 miles. Mr. PLATFORD. 18.1.16. Agreed E.P. Mr. NORTHEY. | ||