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).
Weight calculation memorandum regarding a change in gauge frame for the Wraith model.
| Identifier | ExFiles\Box 107\4\ scan0152 | |
| Date | 30th August 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester}9/JH.30.8.38. Cont'd.{John DeLooze - Company Secretary} .128" gauge frame instead of .104. 40 approx. 118 1/2 lbs. Subtracting the weight of 118 1/2 lbs. from the production Wraith weight one gets 3043 1/2 lbs., or without the lighter gauge frame 3083 1/2 lbs. Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester} | ||