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).
Standardisation of the low speed jet control cone for the Phantom.
| Identifier | ExFiles\Box 171\3\ img260 | |
| Date | 14th October 1925 | |
| RR 755 (10H) (SL391 2-11-23) MP 281297 STAMP: ORIGINAL STAMP: COMPLETED 30.10.25 STANDARDISATION of CHASSIS PARTS Date 14.10.25 X No. 8080 (struck through) 8240 Drawing No. Part List Description of Parts. LOW SPEED JET CONTROL CONE. Origin. R To give better control. Experimental Test Report. The control for the low speed jet on the Phantom is too quick. If the control is used for economy, the engine is likely to stop due to low speed jet weakness. It is proposed to alter the taper from 1 in 6 to 1 in 7.5. Road Test Report. Fitted to 46-PK - run 1500 miles. Fitted to 8-EX. We recommend that this alteration should be adopted. WATERMARK: PHANTOM ACTIONS: A Scrap and replace at all costs, including Chassis already delivered to customers. B Scrap and replace on Chassis in works. C Scrap present stock and replace on all Chassis not yet handed to test. D Use existing stock Alteration effective on future Chassis. Weight of Old Part. £ Weight of New Part. £ Difference per Car. £ Cost of Old Part. £ Cost of New Part. £ Difference per Car. None. Cost of Parts in Works which will be scrapped if commenced on:- Series.........£......... Series.........£......... Series.........£......... Signature of Mr. De LOOZE that above is correct. My/Rns. 16.10.25. SIGNATURES TABLE SIGNATURES | DATE | REMARKS MR. JOHNSON | 30.10.25 | Agreed. C.Johnson. MR. B. JOHNSON | 30.10.25 | Agreed. B.J. MR. ROYCE | 23/10/25 | Agreed FHR MR. WORMALD | 14.10.25 | Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE | 15.10.25 | Agreed. Rg.{Mr Rowledge} MR. DAY | 16.10.25 | Agreed. Da.{Bernard Day - Chassis Design} MR. BAILEY | 14.10.25 | Agreed. BY.{R.W. Bailey - Chief Engineer} MR. PLATFORD | 14.10.25 | Agreed. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT | 23/10/25 | Agreed AE MR. NORTHEY | 16.10.25 | Agreed. PN.{Mr Northey} MR. HIVES | 28.10.25 | Agreed. E.Hives. | ||