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).
Suggesting the fitment of a supplementary Proney brake to allow for low-speed testing of Phantom engines.
| Identifier | ExFiles\Box 120\3\ scan0019 | |
| Date | 1st November 1928 | |
| To Hy.{Tom Haldenby - Plant Engineer} from Hs.{Lord Ernest Hives - Chair} c. to Wor.{Arthur Wormald - General Works Manager} XL1456 Hs{Lord Ernest Hives - Chair}4/LG2.11.28. CHASSIS ENGINE - FROUDE BRAKES. With the present Froude brakes used for testing Phantom engines we cannot reduce the engine speed below 600 r.p.m. For certain work R.{Sir Henry Royce} has asked for on carburetters it is necessary for us to run full throttle at 300/400 r.p.m. We suggest that, if it is not possible for the makers to modify the present dynamometer to cover this range, we fix a small Proney brake at the rear of the engine to supplement the water brake/low speeds. We should like this carried out on the test bench we are using for Phantom engines. Hs.{Lord Ernest Hives - Chair} | ||