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 to the Front Silencer using non-rusting and better lagging material (staybright).
| Identifier | ExFiles\Box 171\1\ img048 | |
| Date | 24th September 1926 | |
| RR 289A (10H) (SL 72 19-7-23) MP 274954A ORIGINAL COMPLETED 19.10.26 ALTERATIONS TO R.R. AERO ENGINE PARTS. 40/50 CHASSIS. Description of Parts: FRONT SILENCER. Origin: Non-rusting and better lagging (staybright) Experimental Test Report: 10,000 miles in France fitted to 12-EX. Remained in very good condition. The present aluminium lagging quickly deteriorates. Signature of Expl. Dept. that above is correct: Weight of Old Part: Cost of Old Part: £ 1. 8d. Weight of New Part: Cost of New Part: £ 7. 4d. Difference per Engine: Difference per Engine: £ 5. 8d. increase. Signature of Mr. De LOOZE that above is correct: My/Rb{R. Bowen} 14.10.26 DATE: 24.9.26 X No. 7230 Drawing No. E.74696 Part List E.74635 Air Ministry consent obtained. Difference in weight. "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. Cost of Parts in Works and Stores which will be scrapped if commenced on:-- SIGNATURES | DATE | REMARKS [Signature] | 25.9.26 | Agreed. CWB. MR. B. JOHNSON | 18.10.26 | Agreed. B.Johnson. MR. ROYCE | 1/10/26 | Agreed FMP MR. WORMALD | 24.9.26 | Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE | 27.9.26 | Agreed. Rg.{Mr Rowledge} MR. DAY | 1/10/26 | 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 OE MR. HIVES | 24.9.26 | Agreed. Hs.{Lord Ernest Hives - Chair} Mr. Northey. | 29.9.26 | Agreed. PN.{Mr Northey} | ||