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).
Type test report for a Standard Kestrel S engine with a Gosham I supercharger.
| Identifier | ExFiles\Box 179b\2\ img183 | |
| Date | 29th November 1932 | |
| ORIGINAL R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Fns. C. to BG. C. to W.P. C. to Ag. C. to AV. C. to LF. C. to LP.{Mr Lappin} STANDARD KESTREL S ENGINE WITH GOSHAM I SUPERCHARGER SPECIAL CATEGORY TYPE TEST. The special category type test of the standard Kestrel S. engine, fitted with Gosham I supercharger and carburetter, consisting of full throttle ground level endurance running, in accordance with memo: No. A/MS. 23.8.32, has now been completed. These tests consisted of 1 hour endurance running at full throttle ground level at 2500 R.P.M. and 1 hour similar conditions at 3000 R.P.M. using special fuel, 80/70/16+4 cc (AV/Benz/Meth.) K17D Plugs and castor D.T.D. 71 oil, and open exhaust. The following figures show the average readings at each speed:- R.P.M. B.H.P. PTS/HP/HR. Abs. Boost. In.Hg. Oil Pres. lbs/sq".in. Oil Temp. In. Out. Water Temp. In. Out. 2500 871 .593 41.33"Hg. 214lbs/sq".in. 66°C. 82°C. 66°C. 75°C. 3000 1040 .588 51.35"Hg. 212 lbs/sq".in. 89°C. 93°C. 68°C. 78°C. Oil Consumptions for Each Hour. 2500 R.P.M. 13 Pts. 3000 R.P.M. 26+ Pts. During the tests, no indications of blower slip or surging occurred and no trace of ignition trouble of any description was observed. The engine generally, running remarkably smooth and consistent. | ||