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).
Adoption of Bostock & Bramley's parallel worm gear design over the Henley type.
| Identifier | ExFiles\Box 66a\3\ scan0172 | |
| Date | 8th April 1928 | |
| RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} from R.{Sir Henry Royce} BY.{R.W. Bailey - Chief Engineer} Hs.{Lord Ernest Hives - Chair} c. to BJ. Wor.{Arthur Wormald - General Works Manager} F1. X8170 R2/M8.4.28. AERO ENGINES, CAR ENGINES, & CHASSIS WORK. X.4017 WORM GEARS & AERO MAGNETO DRIVES. X.2061 X.3837 X.8170 There are so many forms of teeth for the above, but one feels that Messrs. Bostock & Bramley have the nearest to perfection. Their scheme with parallel worm is perhaps more practical than the curved or Henley type, but also less capable of carrying maximum loads. Ought we not to adopt one of the other of their patterns in all our work, using that which tests shew most suitable, one reason being that it may not be so exacting in lubrication, and secondly it may not develop slack so quickly, which I believe will lead to trouble - i.e. noise or failure. R.{Sir Henry Royce} | ||