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).
Brake and dynamometer test results comparing a Rolls Royce vehicle with a Delage vehicle.
| Identifier | ExFiles\Box 21\4\ Scan079 | |
| Date | 30th July 1920 guessed | |
| -2- BRAKE TEST ON ROAD (DRY TARMAC) Speed. R.R. Delage. Remarks. 20 MPH. 15 yds. 7 yds. Delage tyres Michelin safety treads. 30 MPH 32 yds. 18 " R.R. Dunlop Magnum Goodyear. diamond tread. 40 MPH. 57 yds. 40 " DELAGE ON DYNAMOMETER. Revs. M.P.H. Dyn. lbs. HP. 500 12 109 86 12.56 13.4 750 20 152.5 84 14.97 18.3 1000 27 1/2 200 70 18.76 20 1250 35 1/4 250 66 22.07 23.5 1500 43 306.25 56 23.08 24.5 1750 49 346.25 53 24.59 26.2 2000 55 1/4 388.75 45 23.44 25 2250 60 432.5 30 17.30 18.5 Compression — 73 and 74 lbs. | ||