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).
Outlining two schemes for modifying the 'Goshawk II' engine's induction pipe to resolve a hot spot issue.
| Identifier | WestWitteringFiles\G\October1921\ Scan48 | |
| Date | 7th October 1921 | |
| To BA. from E.{Mr Elliott - Chief Engineer} Copy to SJ. " " WOR.{Arthur Wormald - General Works Manager} " " HS.{Lord Ernest Hives - Chair}✓ " " BY.{R.W. Bailey - Chief Engineer} ORIGINAL X.4227 E3/G7/10/21. RECEIVED RE "GOSHAWK II" INDUCTION PIPE WITH MODIFIED HOT SPOT. We send you herewith a further scheme (Lec.1460) for overcoming the trouble on the "Goshawk II" due to the hot spot. In this scheme as much of the hot jacket as possible is amalgamated with the exhaust pipe. The remainder, that is to say, that portion which is in one piece with the induction pipe, is the cooler part of the jacket, and is made in such a form that the change of section where the jacket finishes, is not pronounced and also the heating effects should be graded off more gradually. The other design that we have in mind is one in which the hot spot is supplied with exhaust gas by a bye-pass pipe, the main exhaust pipe having nothing to do with it, but being fitted with a baffle valve connected with the accelerator pedal so that at the small throttle openings all the exhaust gas will pass to the hot spot. E.{Mr Elliott - Chief Engineer} | ||