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).
Experimental piston and gudgeon pin designs for the 'Condor' III aero engine.
| Identifier | ExFiles\Box 53\4\ Scan086 | |
| Date | 1st September 1923 | |
| Y4603 R.{Sir Henry Royce} or C.L. [struck through] or R.M. [struck through] or By.{R.W. Bailey - Chief Engineer} [struck through] S. Hd.{Mr Hayward/Mr Huddy} [struck through] Rg{Mr Rowledge}1/Wll. 9. 23 We are in receipt of your memo, R1/MS.9.23, together with LeC.1758. The various experimental schemes for car pistons are being instructed as soon as possible. With regard to aero engine work, I am in entire agreement with your remarks, but I should like to discuss the particular case of the "Condor" III Engine with you further. We hope to have the "Condor" Engine absolutely standardized at an early date. The reason I did not go to a full floating gudgeon pin was that, although I have previously used it, and consider it the best job, it required a certain amount of experimental development, and probably whilst doing this we should find it desirable to give up the present Zephyr type of piston. Changing the type of piston would upset our lubrication experience, and possibly run us into other difficulties. The proposed modification removes the trouble which has been found, and which affects the customer seriously, as if it happens in flight it not only stops the engine, but may wreck it. With regard to the difficulty of manufacture, this is quite true, but applies equally to all our aero engine gudgeon pins. I should like to retain our proposed scheme for the "Condor" III, and to decide that any further type aero engine we develop should have the full floating pin, in fact that we should start right away proving the full floating pin type on existing engines. Rg.{Mr Rowledge} | ||