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).
Data sheet comparing propeller shaft specifications and performance for Cadillac, Studebaker, and Vauxhall vehicles.
| Identifier | ExFiles\Box 148\4\ scan0150 | |
| Date | 8th June 1940 | |
| -2- Rm{William Robotham - Chief Engineer}/GB.4/JH.8.6.40 Type. C to C length. D.{John DeLooze - Company Secretary} t. Max. safe speed. r.p.m. Revs. Mile. Max. safe Road. speed. CADILLAC. 37 50 & 60 47.35 2 1/4 .083 5130 - - 37 75 & 85 56.45 3 .065 4900 3130 94 38 60 45.75 2 1/4 .083 5500 2740 120 38 75 56.15 3 .065 4930 3100 95.5 38 90 52.55 3 .065 5630 2914 116 STUDEBAKER. 20 HP CHAMPION 51.5 2 3/4 .065 5370 3520 91.5 The theoretical whirl speeds for the Vauxhall shafts are - H.5700 I 5520 J 6130 G 6350 The following shafts were proposed by M.Olley on 22.6.39. apparently for use with G.Box extension. Shaft. Dia assumed l 1² Safe speed Revs. Mile. Max. speed. 1941J 2" 43.93 1940 5320 3630 88 H 2 1/4 45.54 2076 5590 4090 82 I 2 1/4 49.04 2410 4820 3670 79 E 2 1/2 50 2500 5160 3630 85.3 F 2 1/2 52 2704 4775 3460 83 The safe speed given by the Hardy Spicer formula is 79% of the theoretical whirl speed. From a note by M.{Mr Moon / Mr Moore} Platt 13th. Sept. 1939 re memo. from M.{Mr Moon / Mr Moore} Olley to Mr King. M.{Mr Moon / Mr Moore} Olley had examined a new Mechanics Pro. shaft for a Hotchkiss Cheve. | ||