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 the 40/50 model radiator and cylinder block, detailing weights and water capacities.
| Identifier | ExFiles\Box 38\2\ Scan242 | |
| Date | 17th September 1924 | |
| V3456 17.9.24. 40/50 RADIATOR - CYL:BLOCK. X3456 / Y200 X.3437 Size of matrix. Wt. of rad: with this matrix. Water equivalent of this radiator. Water capacity of radiator with this matrix. 20 1/2" 96 lbs. ± 2 9.0 lbs. 7 galls. 3 1/4 pints. exactly 3.64 at 14°C 21 1/2" 100 " ± 2 9.39 " 22 1/2" 104 " ± 2 9.75 lbs. 23 1/2" 111 " ± 2 10.3 " Wt. of 40/50 cyl. block 204 lbs. Water equivalent 27 lbs. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||