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).
The performance and issues of a prototype petrol injection engine, including temperature readings.
| Identifier | ExFiles\Box 173\1\ img166 | |
| Date | 22th January 1933 guessed | |
| III PETROL INJECTION This is not yet in production. One engine is [three others buy here] still running on the commercial routes and the general impression seems to be that it is very satisfactory. Its main virtue is that under no condition can it ice up, "the bugbear of commercial flying in winter here". On an ordinary engine they raise the mixture temp. by as much as 100°F and get by exhaust heaters, and yet, if the pilot forgets to switch the heat over to max before he begins to ice up he cannot clear the trouble & will have to forced land. leading edge trouble similar (steam cooled ado) Cyl temps. (Asked them what max cyl temps they record on climb in the air. They say 560°F exhaust valve seat 480°F rear spark plug. 92 M.P.H. air speed, weakest mix. If they go full strong rear spark plug temp drops 80°F.{Mr Friese} Under same conditions, piston temps run at about 350°F under the ring belt with their latest ribbed cooled crown. | ||