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).
Alteration form for a modified bush and spring on a 'D' type keyed change gear shaft for a 40/50 HP Chassis.
| Identifier | ExFiles\Box 171\1\ img049 | |
| Date | 24th September 1926 | |
| RR 288A (10H) (SL 72 18-7-23) MP 274954A ORIGINAL COMPLETED 19.10.26 40/50 HP. CHASSIS. ALTERATIONS TO R.R. AERO ENGINE PARTS. Date 24.9.26 CONDOR EAGLE FALCON HAWK X No. 7320 / 7310 Drawing No. G.74927 Part List G.74909/11. Air Ministry consent obtained DIFFERENCE IN WEIGHT. Description of Parts 'D' TYPE C.H.N.S. KEYED TYPE CHANGE GEAR SHAFT - MODIFIED BUSH AND SPRING. Origin To prevent grit getting in bush and shaft causing change speed lever to bind. Experimental Test Report This improved design got over the binding effect when changing from 2nd. to 3rd. or direct gears. The binding, caused by wear of the bush and scoring of the shaft with grit etc. 10,000 miles in France fitted to 12-EX. The change speed lever was free from jamming throughout the test. There was no sign of cutting or scoring of the shaft due to grit etc. PHANTOM "A"-Scrap and replace at all costs. "B"-Scrap and replace on those engines in Works. "C"-Scrap present stock and replace on all engines not yet handed to test. "D"-Use up existing stock. Alteration effective on future engines. Signature of Expl. Dept. that above is correct Weight of Old Part Cost of Old Part £ 18s 6d. Cost of Parts in Works and Stores which will be scrapped if commenced on: -- Weight of New Part Cost of New Part £ 19s 6d. Difference per Engine £ 1s 0d. increase. Signature of Mr. De LOOZE that above is correct My/Rb.{R. Bowen} SIGNATURES | DATE | REMARKS C.W.B. | 25.9.26 | Agreed. CWB. MR. B. JOHNSON | 18.10.26 | Agreed. B.Johnson. MR. ROYCE | 1/10/26 | Agreed FHR MR. WORMALD | 27.9.26 | Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE | 27.9.26 | Agreed. Rg.{Mr Rowledge} MR. DAY | 2/10/26 | Agreed Da{Bernard Day - Chassis Design} MR. BAILEY | 11.10.26 | Agreed. BY.{R.W. Bailey - Chief Engineer} MR. PLATFORD | 27.9.26 | Agreed. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT | 1/10/26 | Agreed RE MR. HIVES | 24.9.26 | Agreed. Hs.{Lord Ernest Hives - Chair} Mr. Northey. | 29.9.26 | Agreed. PN.{Mr Northey} | ||