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).
Dynamometer power test results and general running impressions for the Goshawk 11 engine.
| Identifier | Morton\M1.1\ img002 | |
| Date | 1st August 1921 | |
| 1st G.II engine. Dyno Power tests ORIGINAL To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Ds. - c. to EY. - c. to Wor.{Arthur Wormald - General Works Manager} Hs{Lord Ernest Hives - Chair}1/L04. 8. 21. *GOSHAWK 11: X4219 General running. We have run this engine now about 25 to 30 hours and have carried out a number of tests. This first impression of the engine is very pleasing. The valve operating mechanism is very good for silence. The engine allround is a very great advance on Goshawk 1. Horse Power Tests. | Revs. | H.P. No exhaust pipe or hot spot fitted. | H.P. Exhaust pipe and hot spot | |---|---|---| | 500 | 10.7 | 10.1 | | 750 | 16.25 | 15.6 | | 1000 | 22.0 | 21.4 | | 1250 | 27.6 | 26.0 | | 1500 | 33.1 | 30.7 | | 1750 | 38.6 | 35.3 | | 2000 | 43.75 | 40.4 | | 2250 | 48.75 | 45.0 | | 2500 | 53.1 | 50.0 | | 2750 | 56.1 | | | 3000 | 57.5 | | | ||