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).
Inquiry chasing a reply about the availability of a specially calibrated aero engine electrical speed indicator.
| Identifier | ExFiles\Box 33\5\ Scan022 | |
| Date | 29th October 1919 | |
| Hs.{Lord Ernest Hives - Chair} X.1807 BY/JH7/H29.10.19. AERO ENGINE ELECTRICAL SPEED INDICATOR. In our memo BY1/H16.10.19.we asked whether one of the above instruments with specially divided voltmeter calibrated in revs. instead of volts, was available; as yet we have not received a reply. Could you please let us know per return whether one of these is in existance. BY/JH. | ||