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).
Modification to a silencer assembly due to expansion issues found during testing.
| Identifier | ExFiles\Box 66\2\ scan0125 | |
| Date | 27th November 1925 | |
| R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: HS{Lord Ernest Hives - Chair}/AJL/LG27.11.25. CONSTRUCTION. 4 BAFFLE PLATES EQUALLY SPACED 9.066 A 27.2" 29.2" ( LENGTH OF SHELL ) The above sketch shows disposition of the four transverse silencer baffles E.74339. It was found on dynamometer test that the intermediate pipe 'A' expanded backwards and the rear end of it pushed against the cutout elbow, breaking it off at the flange. It will be necessary to shorten this so that it can expand .250" before the rear end becomes flush with the silencer end; to accommodate this it will also be necessary to lengthen the end flange E.74333 in order to support the intermediate pipe when it is cold. The maximum expansion of this pipe is .250"; provision therefore should be made to accommodate this. Hs{Lord Ernest Hives - Chair}/A.J.Lidsey. | ||