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).
Letter to De Havillands Ltd. regarding an F.XII engine for a DH.9a, requesting airscrew modification and radiator repair.
| Identifier | ExFiles\Box 36\2\ scan 167 | |
| Date | 16th March 1928 | |
| Expl: Dept. X2934 Hs{Lord Ernest Hives - Chair}/TAGl/LG. 16th. Mar. 1928. X2810 Messrs. De Havillands Ltd., Stag Lane Aerodrome, Edgware. Dear Sirs, Mr. Hearle for attention of Mr. Cross. Please find enclosed a copy of power curve taken on a F.XII engine with 7/1 comp: ratio pistons fitted. This will be the type to be installed in the DH.{D. Henderson - Showroom}9a and will be ready in about 10 days time. Would you please have the wooden airscrew modified which we used on the last engine. Your Mr. Cross required the curve before deciding on the modification necessary. We would also like to point out that the radiator started to leak on our last flight and would be grateful if this could be repaired before the new engine is installed. The new engine will have the exhaust manifolds fitted so perhaps Mr. Cross could arrange to have the extension pipes prepared and ready for when the engine arrives. Thanking you, Yours faithfully. | ||