Specification sheet detailing the weights of the 40/50 and Goshawk clutch and flywheel components.
| Identifier | ExFiles\Box 74\2\ scan0357 | |
| Date | 27th February 1923 | |
| X4244 DETAILS OF 40/50 CLUTCH AND FLYWHEEL WEIGHTS. Wt. of Crankshaft member. 50 lbs. " " Flywheel Member 43 lbs. " " lined Alum. Member 13 lbs. Approx. radius of gyration 6.5". DETAILS OF GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) CLUTCH AND FLYWHEEL WEIGHTS. Wt. of Flywheel portion 70 1/4 lbs. " " Steel Ferodo plates. 12 1/4 lbs. " " portion with toggles. 12 1/2 lbs. Approx. radius of gyration 5 1/4". ------------------------- Handwritten notes: Top right: 27.2.23. X3439 X4244 X4538 | ||
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).