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 a set of straight-toothed, sharp-cornered starter motor gears, summarizing previously issued gear types.
| Identifier | ExFiles\Box 64\4\ scan0026 | |
| Date | 12th December 1927 | |
| X7653A TO R.H.G. C. EFC. BY/RD3/ML2.12.27. E.A.C.7 - STARTER MOTOR. Please receive herewith blueprints of D.71510 - Pinion and G.76378 - Gear Ring, representing a set of gears having straight teeth (corrected) but with sharp corners on the engaging faces and suitable for 2.A scheme. Will you please put one set in hand. For your information we give a summary of the gears issued for this scheme:- (1) Helical teeth (5°) rounded ends - Noisy. ✓ (2) Straight teeth (corrected) rounded ends. ✓ (3) Helical teeth (5°) " " " (4) Straight teeth. " Sharp corners. BY/RD | ||