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).
Requesting modifications and further testing for a B-4 Unit practice engine.
| Identifier | ExFiles\Box 90a\2\ Scan125 | |
| Date | 16th July 1934 | |
| To RHC.{R. H. Coverley - Production Engineer} ~7962 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}6/KW.16.7.34. B-4 Unit. Practice Engine for Ulster. We are handing this engine over to you. Will you please fit the special set of Aerolite Pistons now in the Stores and replace the standard Bentley camshaft and tappets. This engine has not yet completed 10 hours endurance which is necessary before we can be sure of the reliability of the engine fitted to Hall's car, and therefore it is important that it should be returned to test as soon as possible. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||