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).
Performance test results for an S.S. Jaguar at Brooklands Track.
| Identifier | ExFiles\Box 126\5\ scan0095 | |
| Date | 14th October 1938 | |
| 1070. also 1320 To Rm.{William Robotham - Chief Engineer} c. to FILE. Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}11/JH.14.10.38. S.S. Jaguar. Performance tests at Brooklands Track 8.9.38. (weather windy) Weight with two persons 34 3/4 cwts. as tested. Ticknall Hill. 10 m.p.h. start. Top gear 52.5 secs. Lap speeds. (a) Ignition set for fair detonation at lowspeeds 82.9 m.p.h. (b) Ignition fully advanced. Bad detonation at low speeds 84.5 m.p.h. Speedo and rev-counter check. Speedo reading. Rev counter reading True rpm. True speed. 30 mph. 1500 r.p.m. 1500 30.2 mph. 50 " 2400 " 2500 50.7 " 70 " 3300 " 3350 67.8 " 90 " 4300 " 4350 88.0 1/2 mile f.s. Mean speed 87.22 m.p.h. Best speed 89.6 m.p.h. 1/4 mile S.S. Through gears 20.9 secs. 1/2 mile S.S. " " 32.4 " Acceleration times. 10-30 mph. 8.3 secs. 10-40 " 12.3 10-50 " 15.8 10-60 " 21.3 10-70 " 28.2 Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} | ||