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).
Test report on a Kestrel-IIS-325 engine before dispatch for flight tests.
| Identifier | ExFiles\Box 179\2\ img122 | |
| Date | 5th January 1932 | |
| Rg.{Mr Rowledge} From Hs{Lord Ernest Hives - Chair}/Yng. c. to Mr. E.{Mr Elliott - Chief Engineer} c. to Mr. EP.{G. Eric Platford - Chief Quality Engineer} c. to Mr.James. ORIGINAL Hs{Lord Ernest Hives - Chair}/Yng./WMA. 5. 1. 32. KESTREL - IIS - 325 FOR TOLLERTON. We have now completed the schedule of tests requested for Kestrel-IIS-325, prior to its despatch to Tollerton Aerodrome for use in flight tests with the Fairey III F machine. The engine is fully supercharged and has no provision for the fitting of an automatic boost regulator. The pistons ..SGS3 have been ground to give increased clearances viz:- .040" - .022" on the parallel portion of the skirt and .025" - .027" on the taper portion. Standard type piston rings are fitted, the scraper rings being of the perfect circle type with .018" groove. The tests, which were A.I.D. observed were as follows:- (1) Endurance test of 1 hour at 90% G.L.P. the last 5 mins being at the rated boost of - 1" Hg. - 2250 R.P.M. (2) Final test of 1/2 hour at 90% G.L.P., the last 5 mins being at the rated altitude of 11.500 ft. - 2250 R.P.M. (3) A Power Curve over the speed range 2700-1800 R.P.M. at the rated altitude. (4) A Power Curve over the speed range 2700-1800 R.P.M. at the rated boost. The appended curve 276 "F" shows the results obtained. The oil consumption on the final test was at the rate of 6 pts/hr. The engine has now been returned to the shop to be prepared for despatch. Hs{Lord Ernest Hives - Chair}/H.K.Young. Curve 276 "F" Attached: | ||