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).
Specification sheet for Beardmore and other railcar engines.
| Identifier | ExFiles\Box 134\1\ scan0154 | |
| Date | 4th April 1939 | |
| 1129 COPYFOR FILES. To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards} Typed 4.4.39. RAILCAR ENGINES. Beardmore:- 6 cyl. 225/250 H.P. 6½" bore x 9" stroke. Weight 4,800 lb. or 19 lbs/H.P. 6 cyl. 90/100 h.p. 4½" bore x 6" stroke. Weight 1,640 lbs. or 16.4 lb/H.P. Supercharging with exhaust gas turbo-blower increases power by 50%. Other engines (no makers quoted, but probably Beardmore). H.P. | NO. OF CYLR. | BORE x STROKES | R.P.M. | PISTON SPEED | RUBBING SPEED | B.P.H. PRESS. 200 | 4 | 8¼ x 12 | 750 | 1500 | 930 | 3200 400 | 8 | 8¼ x 12 | 750 | 1500 | 930 | 3200 330 | 12 | 12 x 12 | 800 | 1600 | 1566 | 2280 225 | 6 | 6½ x 9 | 1200 | 1800 | 1260 | 1700 90 | 6 | 4½ x 6 | 1800 | 1800 | 1296 | 1950 * Probably not a railcar engine. 28 cars on the Canadian National Railways are fitted with 200 H.P. engines running at 750 r.p.m. | ||