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 document for modified induction pipes on Eagle IX aero engines following failures of the existing parts.
| Identifier | ExFiles\Box 46\1\ Scan118 | |
| Date | 2nd February 1925 | |
| RR 288A (10H) (SL 72 18-7-23) MP 274954A V.H.126 HS.{Lord Ernest Hives - Chair} Rns COMPLETED 17.2.25 ALTERATIONS TO R.R. AERO ENGINE PARTS. RECEIVED FEB 2 1925 Description of Parts Modified Induction Pipes. Origin Failure of existing type parts. Experimental Test Report a 50 hr. test of the West WitteringHenry Royce's home town scheme of Induction Pipes was completed satisfactorily on Saturday, 31st. Jan., and it is recommended that arrangements be made for this scheme to be applied to all "Eagle" IX Engines as quickly as possible, and that it should be adopted for the replacements on existing engines, as already discussed. (In each instance to be agreed by the Administration. BJ.) Signature of Expl. Dept. that above is correct: E.{Mr Elliott - Chief Engineer} Hives. Weight of Old Part: 5 lbs. 5 ozs. Cost of Old Part: £ 7 - 0 - 9 Weight of New Part: 7 lbs. 11 ozs. Cost of New Part: £ 14 - 5 - 5 Difference per Engine: 4 lbs. 12 ozs. increase Difference per Engine: £ 4 - 8 increase Signature of Mr. DE LOOZE that above is correct: My/Rns 3/2/25 Right Column: ENGINE TYPE: EAGLE IX DATE: 2. 2. 25 X No. 4126 Drawing No. Part List: E.24914 Air Ministry consent obtained "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:— See also MV/Rns17/HS{Lord Ernest Hives - Chair}/139/BJ. 2.25 attached APPROVAL SIGNATURES: SIGNATURES | DATE | REMARKS MR. JOHNSON | 5 Feb. | Agreed CJ. MR. B. JOHNSON | 5.2.25 | Agreed BJ. MR. ROYCE | 8.2.25 | Agreed F.H.R. MR. WORMALD | 4.2.25 | Agreed Wor.{Arthur Wormald - General Works Manager}. MR. ROWLEDGE | 2.2.25 | Agreed Rg.{Mr Rowledge} MR. DAY | 4.2.25 | Agreed Da.{Bernard Day - Chassis Design} MR. BAILEY | 2.2.25 | Agreed By.{R.W. Bailey - Chief Engineer} MR. PLATFORD | 2.2.25 | Agreed EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT | 3.2.25 | Agreed E.{Mr Elliott - Chief Engineer} MR. HIVES | 2.2.25 | Agreed E.{Mr Elliott - Chief Engineer} Hives. | ||