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).
Table of Critical Air Temperatures (C.A.T.) for various experimental cars under different test conditions.
| Identifier | ExFiles\Box 135\2\ scan0220 | |
| Date | 7th November 1940 | |
| 1134 To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Col. Rm{William Robotham - Chief Engineer}/Col.3/ET.7.11.40. CRITICAL AIR TEMPERATURES OF EXPERIMENTAL CARS -------------------------------------------- The following table gives the C.A.T. of several of the Experimental Cars under full throttle maximum speed, and full throttle m/h.{Arthur M. Hanbury - Head Complaints} conditions. No figures are available for 4-B-50, 11-B-V and 12-B-V as the standard of cooling on these cars has not been determined: CHASSIS CRIT. AIR TEMP. CRIT. AIR TEMP. F/T. MAX. SPEED F/T. 30 M.P.H. ---------------------------------------------------------------------------------------------------- 30-G-VII. 45.0 39.5 ---------------------------------------------------------------------------------------------------- 3-B-50 36.5 29.5 ---------------------------------------------------------------------------------------------------- 1-R-1 46.5 --- With MK.VI matrix and thermostatic shutters ---------------------------------------------------------------------------------------------------- 1-R-1 40.0 --- With MK.III matrix and fixed shutters. ---------------------------------------------------------------------------------------------------- 8-B-V 44.0 37.5 Towing tests at 40 m.p.h. in direct gear ---------------------------------------------------------------------------------------------------- BUICK 44.0 37.0 ---------------------------------------------------------------------------------------------------- Rm{William Robotham - Chief Engineer}/Col. | ||