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 40-50 HP Sprengel Air Line Unit with manufacturing and handling instructions.
| Identifier | ExFiles\Box 44\2\ Scan126 | |
| Date | 14th May 1928 | |
| 18'-0" ± 1/2" .125" +.000" O.D. Silver Soldered Air Line to be treated as a unit. Air Line is not to be interfered with in any way, especially not to be soldered or brazed after receipt. Air Line is dried by special process after manufacture by H.M.H.LTD, and will remain dry in stores etc, and ready for installation at any time if not interfered with. See Drawing Number K.S. 202. D.{John DeLooze - Company Secretary} H.M. HOBSON. LTD 47-55 THE VALE, ACTON. W.3 TITLE Rolls Royce 40-50.H.P. (SPRENGEL) AIR LINE UNIT. NO OFF PER SET. 1. WHEN ORDERING QUOTE THIS DRAWING No K.S.224.D. MATERIAL VARIOUS. SPECIFICATION PATTERN STAMPING H.K.S. TELEGAGE MACHINE WHERE MARKED F.{Mr Friese} MACHINE ALL OVER TOLERANCE ON MACHINING DIMENSION .010 UNLESS OTHERWISE STATED. THIS DRAWING CANCELS DRAWING No THIS DRAWING IS CANCELLED BY DRAWING No DRAWN. W. TRACED. Gr.{George Ratcliffe} CHECKED. L. DATE 14.5.28 | ||