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).
Instructions detailing the brush position and advance settings for a Goshawk Motor.
| Identifier | ExFiles\Box 35\4\ scan 082 | |
| Date | 28th February 1922 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 X. 4384. ROLLS-ROYCE LIMITED. INSTRUCTIONS. To E.F.C. Order No P.B. 35 Customer's No. X 4384 Feb. 28th. 1922 Brush Position on Goshawk Motor. The neutral point on this motor is 2° (or 9% of the slot length) in advance of the centre of the slot. Therefore the 75% advance position is equal to an advance of the brushes of 3.5°, or 16%, from the neutral point. Signed E.H.P This Sheet must be filed on completion of the work. | ||