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).
Method for testing the accuracy of a dash instrument using a test rig.
| Identifier | ExFiles\Box 44\2\ Scan132 | |
| Date | 15th May 1928 | |
| METHOD OF TEST FOR ACCURACY. Set dash instrument at facia board angle of calibration. (see label attached to instrument) De-core instrument and set liquid to zero. Couple dash instrument to tank unit by means of air line, and fill up vessel to fuel heads shewn on K.S.325.D. dated May 15, 1928. Fuel specific gravity .750. If air line is disconnected under these conditions tank unit must be emptied and vessel filled up again from zero. Reading on dash instrument to shew ± 1 1/2% of capacities in gallons shewn on dash instrument drawing number K.S.263.D. and tank unit drawing K.S.325.D. Always allow 60 seconds for reading of dash instrument to settle. Diagram of Test Rig. Bottom information panel: H.{Arthur M. Hanbury - Head Complaints} M.{Mr Moon / Mr Moore} HOBSON, LTD 47-55 THE VALE, ACTON. W.3. TITLE PART N° WHEN ORDERING QUOTE THIS DRAWING N° K.S.326.D. MATERIAL SPECIFICATION PATTERN STAMPING MACHINE WHERE MARKED F.{Mr Friese} MACHINE ALL OVER. TOLERANCE ON MACHINING DIMENSIONS ±.010 UNLESS OTHERWISE STATED. THIS DRAWING CANCELS DRAWING N° THIS DRAWING IS CANCELLED BY DRAWING N° H.K.S. TELEGAGE. DRAWN. TRACED. CHECKED. DATE 15.5.28 | ||