Table of specifications for Kestrel and Buzzard engines relevant to spark plugs.
| Identifier | ExFiles\Box 58\2\ Scan036 | |
| Date | 13th April 1932 | |
| PARTICULARS OF R.R. SERVICE ENGINE RELEVANT TO SPARK PLUGS. ENGINE. C.R. NML.SPEED. BMEP. AT RATED POWER. ALT. AT RATED POWER. APPROVED PLUGS. REACH OF PLUG. Kestrel(Aero Engine) 1 A. {Mr Adams} 6/1. 2250 133 3000 ft. Lodge A.2. 17.5 mm. Kestrel(Aero Engine) 1 B. 7/1. 2250 130.4 3000 ft. " " Kestrel(Aero Engine) M.S. 5.5/1 2250 143 2500 ft. " " Kestrel(Aero Engine) S. 6/1. 2250 130.4 11500 ft. " " Buzzard(Aero Engine) M.S. 5.5/1. 2000 2250 145.8 G.L. Lodge A.2. K.L.G.663. " Hs {Lord Ernest Hives - Chair} /Yng.13.4.32. | ||
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).