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).
Vortex Silencers, sending a drawing of a 20 HP rear expansion chamber for testing.
| Identifier | ExFiles\Box 6\7\ 07-page070 | |
| Date | 27th March 1930 | |
| To Ld. From Ha/Rn.{Mr Robinson} c. to Wor.{Arthur Wormald - General Works Manager} Y 5230 Ha/Rn.{Mr Robinson}7/MJ.27.3.30. VORTEX SILENCERS. We send you herewith a drawing of the rear expansion chamber, 20 HP. E.55603. We are willing to test out one of these silencers if the makers care to make one up as suggested in their letter attached. Ha/Rn.{Mr Robinson} | ||