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).
Page two of a report discussing engine development, glycol leaks, oil consumption, and interactions with Wright and Eclipse Aviation.
Identifier | ExFiles\Box 173\2\ img276 | |
Date | 8th March 1934 guessed | |
-page 2. HS.{Lord Ernest Hives - Chair} I attach a letter from Carlton Kemper at Langley Field, in which he also expresses some views on cylinder heads. 4. In discussing glycol with Nutt, he repeatedly emphasized the danger of leaks. He does not consider that the screwed shrunk-on cylinder head, as used on the air-cooled, would necessarily be proof against glycol leaks. They have found it necessary to use blind stud holes in all cases where the stud passes through a joint in order to avoid leaks. 5. I have sent Lovesey all the dope I could obtain on oil-coolers. I shall try to bring one back with me. 6. As indicative of the amount of development work they are doing at Wright's (which work has enabled them to type test 170 m.e.p. on the Cyclone), they are at present using 32,000 American gallons of gasoline per month on development work. 7. Wright have had success running a nitro-gear against the ordinary case-hardened gear. They have given up grinding entirely and now use nothing but lapping. This is from the point of view of efficiency, but it incidentally lowers the cost. 8. Nutt emphasized that we must take no notice of the Conqueror valve size. He says the engine has grown from 4 3/8" bore to 5-1/8" bore without alteration to the cylinder centres, and is therefore under-valved to a very considerable degree. 9. Wright manage to control their oil consumption very accurately by paying particular care to the finish of the cylinder bore. They actually remove 1 1/2 thousandths on the diameter by lapping, and they take exceptional care to get their ring grooves parallel-sided and at right angles to the piston centres; also get the ring faces at right angles to the working surface. 10. I asked Wright's for a lot of dope the last time I was there, including instruction books, and they sent them off to London on February 28th last instead of to Derby. Will you make a point of getting this stuff from London? I have the Conqueror book myself. ECLIPSE AVIATION CORPORATION I spent half a day at the Eclipse Aviation Corporation. They are doing an enormous amount of laboratory work on innumerable subjects, and I have tried to arrange with Mr. Marcus, who is head of the outfit, to send us regularly details of the stuff they are working | ||