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).
Panel milling machinery and design alterations for the Condor aero engine.
| Identifier | ExFiles\Box 181\M11\ img113 | |
| Date | 9th January 1919 guessed | |
| To WOR.{Arthur Wormald - General Works Manager} from E.{Mr Elliott - Chief Engineer} -2- E3/C9119 Contd. In a recent article on spiral bevels in the Automobile Engineer reference is made to adapting a Bilgram straight bevel cutter for cutting spiral bevel gears. PANEL MILLING. It was understood that Mr. Willis was dealing with the question of obtaining a suitable machine for making panel milled pieces. Mr. Wormald thought there was a plain panel milling machine (Pratt & Whitney spline miller) on order, and said that he would see how this matter stood when he returned to Derby. The spline miller was to have an automatically controlled hinged table applied to it for the purpose of dealing with such parts as the valve rockers used on the "Condor." The automatic feed thus obtained will undoubtedly decrease the mortality of the milling cutters, and improve the quality of the work. RE "CONDOR" AERO ENGINE. It was understood from Mr. Hives that the requisite "Condor" power is obtained with .125" increased diameter of cross tube on the induction system with cast elbow connections to suit. It was further understood that the complete draining induction system made to the old sizes was about to be tested. This system should be altered to have the large cross take pipe with elbows to suit. Referring to the "Condor" cylinder leaks, Mr. Royce approved of the proposal to increase the thickness of the cylinder head by about 25%. It was thought that this alteration, together with an improvement in the welding of the valve bends, should get rid of the trouble of leakage. After an inspection of the model carburettor for the "Condor", brough to West WitteringHenry Royce's home town, it was decided to make three alterations as follows:- (a) Alter the locking plates on the floatchamber, all to the single tooth type with the exception of the one dealing with the floatchamber lid.{A. J. Lidsey} (b) Use one-third the number of screws on the air inlet tops. (c) Duplicate the throttle spring on the other end of the throttle if necessary to get sufficient power to open, when controls are shot away. Would Mr. Day have alterations (a) and (b) carried out, and also deal with the alterations to the engine cylinder. (Contd.) | ||