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).
Performance assessment report on a vehicle, detailing issues and recommendations for various components.
| Identifier | WestWitteringFiles\T\2July1928-December1928\ Scan065 | |
| Date | 20th August 1928 | |
| HS.{Lord Ernest Hives - Chair} FROM R.{Sir Henry Royce} C. to BJ. WOR.{Arthur Wormald - General Works Manager} C SC. ORIGINAL INDIA 3. X5770 X5830 X4663 R1/M20.8.28. This car rides well, is very free from sea-sickness feeling, and steers well, giving me great confidence at fairly high speeds. The engine is not very satisfactory for power at high speed, probably temporarily, and somewhat because of design. IGNITION. This is somewhat late (since advanced by R.{Sir Henry Royce}) Seems greatly improved by (1) scrub, (2) spring, and (3) circular distributor rotor. VALVES. The timing of the valves may be affected by the slipper flywheel. Exhaust. There is no cutout, and the fish tail is small, and the exhaust seems to be causing much loss of power at speed. CARBURETTER. Let Mr. Lovesey examine the 20HP. carburetter, because I believe it is strong in the middle if the high speed jet is set strong enough, or it may be that the air valve gets to the top and the strength is thus [drawing of a wave] (Since found to be defectively fitted in low speed jet control.) PISTONS. Seem heavy but otherwise good so far. No smoke or oily plugs, very small oil consumption, (slight leak and noise from one.) ENGINE MOUNTING. The rubber mounting is effective I think because one feels more of the engine via the clutch pedal than the steering column. FLYWHEEL. Should reduce the weight of this to see if any disadvantage, because it would increase the acceleration and reduce weight in an objectionable position. (1) | ||