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).
Weight analysis showing estimated savings for the Rippleto model over the B.V. prototype.
| Identifier | ExFiles\Box 132\2\ scan0066 | |
| Date | 30th October 1939 | |
| Appendix Sheet 1. Ev.{Ivan Evernden - coachwork}1/JH.30.10.39. Weight Analysis. Below are the estimated weight savings on Rippleto over B.V. assuming all steel body and wings for both cars, of which 9.B.V. is the B.V. prototype, and weighs 33 cwt. lbs. Frame. 100 Engine. 112 Gearbox. 25 Rear Axle 20 Wheels and tyres. 50 Cooling. 20 Front suspension. 12 Single prop. shaft. 20 Road springs 10 Oil 8 Tools and spare 12 Bumpers 25 Engine mounting 10 Petrol pumps 10 Exhaust system 20 Bonnet 12 Lamps 10 Petrol & Tank 32 Wiring Conduits 5 Body etc. 112 625 lbs. = 5 cwts. 2 qrs. 9 lbs. Projected Rippleto weight = 29 cwts. 1 qrs. approx. | ||