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).
Specification and modifications for the Spectre Exhaust Silencer system.
| Identifier | ExFiles\Box 91\3\ scan0110 | |
| Date | 25th September 1935 | |
| To By: Hs{Lord Ernest Hives - Chair}/Wym.{G. Harold Whyman - Experimental Manager}6/KW.25.9.35. SpectreCodename for Phantom III Exhaust Silencer. We give below the latest specification for this system :- Complete silencer assembly to E.86539 with the following modifications :- (a) 1.00" to be sawn off small end of cone E.86525 increasing dia. from 1.500" to 1.750". (b) Increase number of .312" dia. holes from 42 to 56. (c) Incorporate mod. LeC.4666 to overcome gas restriction. (d) Increase number of .500" dia. holes in baffle E.86514 from 18 to 22. (e) Increase number of .562" dia. holes in baffle E.86515 from 16 to 18. (f) Baffles E.86514/5, E.87335, and E.86512, should be made with ends of baffles curled over as per LeC.3759, to cure cracking. (g) Blank end E.86501 to be deleted, leaving pipe E.86531 a straight through pipe. (h) 2 further rows of holes in both top hats E.86526/7 increasing number from 60 to 84. Hs{Lord Ernest Hives - Chair}/G.H.Whyman. | ||