Graph plotting road speed against engine RPM for the Goshawk II & III gearboxes.
| Identifier | ExFiles\Box 6\4\ 04-page021 | |
| Date | 26th November 1932 | |
| GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) II & III GEAR RATIOS ROAD SPEED FOR ENGINE R.P.M. LEGEND: SOLID LINE: GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) III 4 SPEED BOX DOTTED LINE: GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) II 3 SPEED BOX THESE CURVES ARE FOR 11/50 AXLE RATIO AND THE FOLLOWING GEAR BOX RATIOS:- G III 1ST 3.73 2ND 2.33 3RD 1.51 TOP 1.00 REVERSE 3.20 G II 1ST 3.77 2ND 1.68 TOP 1.00 REVERSE 4.30 EFFECTIVE WHEEL DIA 18.314" AXIS LABELS: MILES PER HOUR M.P.H. ON REVERSE ENG. R.P.M. GRAPH LABELS: TOP GEAR BOTH BOXES 2ND SPEED G II 3RD SPEED G III 2ND SPEED G III 1ST SPEED G II 1ST SPEED G III REVERSE G II REVERSE G III STAMP: EXPERIMENTAL DRAWING No. GH / 304 DATE 26.11.32 | ||
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).