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).
Graph showing fuel consumption variation for Kestrel fully supercharged engines when throttling back in level flight.
| Identifier | ExFiles\Box 179b\3\ img399 | |
| Date | 27th February 1933 guessed | |
| KESTREL FULLY SUPERCHARGED ENGINES No. 6. FAIREY IIIF - J9173 AT TOLLERTON VARIATION OF CONSUMPTION ON THROTTLING BACK FROM FULLY THROUGH THE GATE POSITION IN LEVEL FLIGHT AT 2000 FT. CURVE 1 - USING SUFFICIENT A.C. TO JUST MAINTAIN R.P.M. CURVE 2 - LOSE 20 R.P.M. AT EACH SPEED. BAR 756 M/M AIR 16°C. MAX R.P.M. 2350 FUEL CONS. LBS/HR. ENGINE R.P.M. A.C. + FROM F.T.P. BOOST (LBS/SQ. IN.) A.C. DROP 20 R.P.M. N2 A.C. + N.M. N1 BOOST (Gauge) W.M LBS/HR DROP 20 RPM LBS/B.H.P./HR | ||