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).
Selection and fitting of bonnet fastener springs for the 'Goshawk II'.
| Identifier | ExFiles\Box 102\6\ scan0015 | |
| Date | 12th July 1922 | |
| X4241 To Hs.{Lord Ernest Hives - Chair} from BY/Shn. cc to RHC{R. H. Coverley - Production Engineer} [text crossed out] BY/Shn1/DB.{Donald Bastow - Suspensions}12.7.22. RE "GOSHAWK II" - BONNET FASTENER SPRING. On looking into the question of Bonnet Springs, we find that with the existing details, Spring E.51600 should show the best results, giving a load when in position of 16 lbs. on each spring or 64 lbs. total. We suggest that you have a bonnet fitted up with springs checked to this drawing, and assembled with the standard spring washer E.50690. Heavier loading could be obtained by using a spring made from square section material. BY/Shn. | ||