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).
Changes to hole sizes for the Wraith III rear engine and gearbox suspension.
| Identifier | ExFiles\Box 6\6\ 06-page247 | |
| Date | 10th July 1937 | |
| WY C. Ds. Dn. WDS. We/Wh. WSC{W. S. Cassel}/WVI. 600 E/HDY.{William Hardy}2/HP.10.7.37. Wraith III Rear Engine and Gearbox Suspension. With reference to M.Sch.5187, now that we are allowed to use drills in 1/64" sizes for special cases, we suggest that the holes in the forged brackets and packings at present instructed .3437 plus 5 should be made .3281 plus 5. The holes in the frame and stiffener remain .3125 plus 5. E/HDY.{William Hardy} | ||