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).
Confirming a blueprint for a Vortex Silencer has been sent to Major Halford to manufacture a test unit.
| Identifier | ExFiles\Box 6\7\ 07-page072 | |
| Date | 29th March 1930 | |
| X 3230 Lp{Mr Lappin}12/AV/JL.29.3.30. Ha/Rm.{William Robotham - Chief Engineer} Copy to Wor.{Arthur Wormald - General Works Manager} Re: VORTEX SILENCERS. ---------------------- As requested in Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}7/MJ.27.3.30. we have sent the Blue Print E.55603 to Major Halford and asked him to make up a Silencer for test. This will be sent to you when complete. Lp.{Mr Lappin} | ||