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).
Driving and driven pulleys for a single belt (Mould No.242) for a standard speed ratio with a Cadillac Fan.
| Identifier | ExFiles\Box 94\5\ scan0027 | |
| Date | 9th March 1937 guessed | |
| Details of pulleys for single belt (Mould No.242). Drive for standard speed ratio with Cadillac Fan. DRIVING PULLEY. External dia. 4.950". Angle of vee 21 1/2°. Depth of vee .760± 10. Top width of vee .860± 5. Otherwise as Ex.25044. DRIVEN PULLEY. External dia. 5.450. Angle of vee 23°. Depth of vee .760± 10. Top width of vee .860± 5. Otherwise as Ex.25045. | ||