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).
List of weights for Goshawk engine piston and connecting rod components.
| Identifier | ExFiles\Box 107\4\ scan0030 | |
| Date | 13th April 1923 | |
| X4538 13.4.23. GOSHAWK WEIGHTS. Standard Goshawk Piston complete with Godgeon pins, set screws and 4 rings :- 1 lb. 2 1/4 ozs. Standard Connecting Rod - small end complete with Bush :- 7 ozs. | ||