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).
Weight reduction of the J.3 engine unit compared to the standard 20/25.
| Identifier | ExFiles\Box 107\4\ scan0115 | |
| Date | 18th February 1932 | |
| Y4538. [redacted] from RHC.{R. H. Coverley - Production Engineer} c. Hs.{Lord Ernest Hives - Chair} RHCl/BE18.2.32. J.3. Engine Unit The above engine unit has been weighed less certain features, in order to get some idea of how weight would compare with standard 20/25. The comparison made shows there will be a reduction in weight of J.3. of 81.5 lbs. The engine units in each case were weighed less induction pipes, carburetter, gear box and dynamo. [STAMP: RECEIVED FEB 18 1932] RHC.{R. H. Coverley - Production Engineer} [Signature] | ||