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).
Specifications and test results for the D.F.P. Chassis, 2850 EM.
| Identifier | ExFiles\Box 21\5\ Scan033 | |
| Date | 24th March 1922 | |
| X 4262 24.3.22. D.F.P. CHASSIS. 2850 EM. Weight of chassis - full of water, oil and petrol Capacity of oil in engine - 2 qrts. " water " Radiator and engine - 2 galls. 3 qrts. " petrol tank - 6 galls. 5 pts. Front cwts. qrs. lbs. 7 3 0, cwts. qrs. lbs. 9 0 0 rear 6 0 0, 8 2 0 Total - 13 3 0, 17 2 0 with test body and spare wheel. Gear ratio - Top direct 4.25 to 1 2nd. 7.25 to 1 1st. 13.25 to 1 Reverse 16.875 to 1 M.P.H. 1000 engine revs 26.05 Valve timing - Inlet. closes. Exhaust. opens. opens. closes. No.1 15°P.T.D.C. 41°P.B.D.C. 60°B.B.D.C. 19°P.T.D.C. 3 18° " 38° " 52° " 14° " 4 15° " 34° " 60° " 10° " 5 11° " 34° " 60° " 14° " Order of firing 1, 2, 4, 3. Capacity of cylinders No.1 No.2 No.3 No.4 CI 6.25 - 6.3 - 6.5 - 6.5 Dynamometer Test. Eng. revs. Drum. lbs. HP. 500 68.5 37 3.62 750 102.75 42 6.171 1000 137.00 36 7.05 1250 171.25 36 8.81 1500 205.50 31 9.1 1750 239.75 28 9.59 2000 274.00 28 10.97 2250 308.25 26 11.47 2500 342.50 22 10.7 Petrol consumption Derby to London 31.5 MPG London to W.N. 36.0 MPG | ||