Particulars of Wraith improved drive fan pulleys.
| Identifier | ExFiles\Box 8\9\ 09-page02 | |
| Date | 26th July 1937 guessed | |
| PARTICULARS OF WRAITH IMPROVED DRIVE FAN PULLEYS. (Other dimensions as Wraith III. details) DRIVING PULLEYS (a) Fan speed ratio of .8/1. Ext. dia. = 5.350 Width at top of Vee = .760 Depth of vee. = .850 Angle of vee = 25° (b) Fan speed ratio of .85/1. Ext. dia. = 5.650 Width at top of vee = .760 Depth of vee = .850 Angle of vee = 25° DRIVEN PULLEY Ext. dia. = 6.550 Width at top of vee = .770 Depth of vee = .850 Angle of vee. = 26° ------- | ||
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).