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).
Bench test report for an engine with performance and specification data.
| Identifier | ExFiles\Box 69\4\ scan0271 | |
| Date | 16th December 1924 | |
| BENCH TEST REPORT TYPE OF ENGINE: W SAC II ENGINE NO.: 3 DESCRIPTION OF ENGINE: - COMPRESSION RATIO: 4-1 INDUCTION SYSTEM: Standard EXHAUST SYSTEM: Two down pipes. Front silencer. Test House Connection - Cut out open. DATE: 16.12.24 BAROMETER: AIR TEMP: VALVES: FLAT HEAD 15° S/S. QUICKSTEP STEEL CAMSHAFT LIFT: .410" LOW LIFT (.425") TAPPET CLCE: .010" TIMING Valves with .010" clce: No.1 cyl. Inlet. Exhaust. Opens. 3.6 48.2 BDC Closes. 46.8 9.3 ADC Ignition. Pts. break fully retarded. Battery. 10° A.T.C Magneto. 10° B.T.C Power & Consumption. | C.O. open. | Dynamo. R.P.M. | B.HP. | Pts/ hr. | Oil press: | Max. output at r.p.m. 600 | 35.3 | | | Amps. 750 | 43 | | | Output at 2000 r.p.m. 1000 | 56.2 | | | Crankcase pressure 1250 | 71.5 | | | Slow running: 160 Battery. 210 Magneto. 1500 | 84.2 | | | Engine gears 1750 | 96 | | | Oil used: Prices Motorine 2000 | 101 | | | Total hrs. run: 28 hrs. 2250 | 102.5 | | | 2500 | | | | 2750 | | | | REMARKS:- Spring Drive 20 lbs. at 17 1/2" radius Oil governor relay 38 lbs, weights first part. Measured at end of 3" lever. Throttle governor allows Hand Control to operate on first notch. Aluminium relay piston fitted .007 clce: After tests - engine fitted to Chassis No. 44-PK | ||