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).
Schematic diagram of the gearbox and servo drive system, detailing gear particulars.
| Identifier | ExFiles\Box 137\5\ scan0079 | |
| Date | 11th April 1927 | |
| DRAWING NO. SK 141 SEE ALSO THE FOLLOWING OPERATION DRAWINGS 2ND M.S. 44 T. STR. 20° TP OR 70 T. L.H. HELIX 1ST & 3RD M.S. 26 T. STR. 20° TP OR 42 T. R.H. HELIX SPEEDO. DRIVE SERVO DRIVE SERVO WORM SHAFT 37T. 14 1/2° 7P 26 T. 20° 7P 21 T. 20° 7P 44T 26 T. REVERSE PINION 26T. 20° 7P 33T. 14 1/2° 13T 21t 20° 20P 6T R.Hd.{Mr Hayward/Mr Huddy} 20° TP 31T R.H. DRAWN BY: OY TRACED BY: AF CHECKED BY: APPROVED BY: LIMITS: ROLLS-ROYCE OF AMERICA, INC. MODEL: SEC.: WEIGHT: DATE: 11/4/27 SCALE: HEAT TREAT: BRINELL: STANTON TITLE: GEARBOX & SERVO DRIVE - PARTICULARS OF GEARS MACHINE ALL OVER MACHINE WHERE MARKED ||| MATERIAL: SPECIFICATION: NO. OFF: DRAWING NO.: S.K. 141 | ||