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 performance metrics at two-thirds of the engine's torque.
| Identifier | ExFiles\Box 51\5\ Scan071 | |
| Date | 15th December 1921 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To E.F.C. Order No PB 32. Customer's No. X 4342 L At two thirds of this torque, namely 44 lb-inches these quantities would be:- Motor speed. 1310 Engine speed. 156 Amperes. 140 B.H.P. .90 Efficiency .53 Signed G.F.P. This Sheet must be filed on completion of the work. | ||