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).
Alteration notice for the inside diameter of fan blades on a Pulley & Fan Dynamo.
| Identifier | ExFiles\Box 124\2\ scan0126 | |
| Date | 11th April 1940 | |
| 136 / RD File 1044 11-4-40 B60. SECTION 8070 RD 487 - PULLEY & FAN DYNAMO ALTERATION INSIDE DIAMETER OF FAN BLADES ALTERED FROM 3.800 TO 3.187 REASON D.O. ERROR [signature] [signature] | ||