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).
Dispatch of a new aluminium turbulent head to achieve a 30% power increase.
| Identifier | ExFiles\Box 103\4\ scan0019 | |
| Date | 20th June 1928 | |
| HS.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} BY.{R.W. Bailey - Chief Engineer} c. to BJ. Wor.{Arthur Wormald - General Works Manager} Y=5050 R2/M20.6.28. INDIA 3. X.5050 X.5005 X.5771 X.5810 We are sending you this week the new aluminium turbulent head for the above. We are in hopes of this arrangement giving an increase altogether of at least 30% more power, at 10% higher speed - 55 B.HP. at 3000 r.p.m. to 70 B.HP. at 3300 r.p.m. With rubber mounting it should be a smooth as the present. With the smaller wheels and lower gear it should give this 30% greater torque. It is with breathless haste we want to press this improvement forward before it is too late. Will Mr. Bailey get the drgs. into the Pattern Shop, and will WOR.{Arthur Wormald - General Works Manager} endeavour to get someone working upon them. R.{Sir Henry Royce} | ||