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 detailing agreed modifications for a winch used for launching gliders.
| Identifier | ExFiles\Box 175\2\ img101 | |
| Date | 26th March 1941 | |
| secret. Rm.{William Robotham - Chief Engineer}1/LL. 26.3.41. Group Captain Harvey, Central Landing Establishment, R.A.F. Ringway, Nr. Manchester. Launching Winch Dear Sir, Further to our recent visit to Oxford in company with Flying Officer Kronfeldt, as a result of Flying Officer Kronfeldt's experience and also examination of the Oxford University Club's winch, the following modifications were agreed to be desirable. 1. Cable speed clock to the detachable tensioner, giving cable speeds in miles per hour. 2. Provision to be made for maximum variations in gear ratios and drum diameters, based on requirements given in the original specification. 3. As much cable as possible without severely modifying the designs. (3500 feet minimum.) 4. A hand throttle on the left hand side of the driver's seat, to open the throttle by pulling towards the driver. A quadrant giving degrees of opening should also be incorporated. 5. All levers, i.e., throttle, brake, clutch, etc., to be easily operated by the operator. 6. Gap between the rollers and pulley to have minimum of one inch. 7. Guards to prevent cable from running off the rollers, also a guard, easily detachable, for the cable drum. 8. The cable speedometer to be in such a position that it is in line with the glider when taking off. - Continued - | ||