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).
Chassis work specifications for the 6-cylinder P.2 and J.1 models, covering present and future development.
| Identifier | ExFiles\Box 65a\3\ scan0285 | |
| Date | 8th May 1931 | |
| X7770 Sg.{Arthur F. Sidgreaves - MD} } FROM R.{Sir Henry Royce} Wor.{Arthur Wormald - General Works Manager} } c. Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} c. E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} R1/M8.5.31. CHASSIS WORK PRESENT, AND IMMEDIATE FUTURE. X.7770 X.5770 X.3993 6 CYL. P.2. AND J.1. The above chassis should have :- (1) Diamond mounting with damping far forward, and perhaps at rear of gearbox, with soft inlaid rubber feet, preferably forward. (2) For P.2. double top, magnetic clutch and brake (touch switch only) and helical epicyclic. For J.1. synchro-mesh, with about 2" extra length of gearbox (but suggest this on 3rd. gear only, because 4th permits no difficulty, and is not an emergency gear?). (3) With the more silent and convenient 3rd. we want a higher back axle ratio. P.2. should have 13 teeth for standard, and 14 teeth for the speed model, which gives :- 13 teeth... 4th gear. 31 MPH. 3rd. gear 23.1 MPH ) per 1000 14 teeth... 4th " 33.2 " 3rd. " 24.6 " } present 26.3 J.1 should have :- 12 teeth... 4th gear 23.5 MPH. } per 1000 13 teeth... 4th " 25.5 " P.2. engine should give good HP. at 3000 R.P.M. and J.1. at 3250 R.P.M. We ought (well before the Show) to get certified speeds of :- P.2. at 95 M.P.H. } Higher if possible. J.1. " 75 " with a small closed body, low, and narrow streamline wings. | ||