Blueprint comparing an 8-cylinder Sleeve Valve engine with the Wraith and TSN's engines.
| Identifier | ExFiles\Box 133\2\ scan0172 | |
| Date | 29th June 1935 guessed | |
| WRAITH 34.0 TSN'S ENGINE 28.5 SLEEVE VALVE 33.0 FIG. 3 8 CYL. 3.125 BORE S/V. ENGINE COMPARED WITH WRAITH & TSN'S ENGINE. Hs {Lord Ernest Hives - Chair} 2066 | ||
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).