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).
Blueprint for a plug for the end of a slow running air tube.
| Identifier | ExFiles\Box 179b\2\ img034 | |
| Date | 20th October 1937 | |
| Hs.{Lord Ernest Hives - Chair} 727, .435 DIA, -2, .050, 30°, .075, .100 UNDERCUT, .010 DEEP, 1.950, .249 DIA, +-1, 4. OFF., PLUG FOR END OF SLOW RUNNING AIR TUBE, ROLLS-ROYCE, LTD., FITTING ROOM, OCT 20 1937, JTLY, MATERIAL - ALUM., DSV | ||