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).
Letter from the Royal Aircraft Establishment discussing wheel wobble, steering control, and tyre dynamics.
| Identifier | ExFiles\Box 153\4\ scan0008 | |
| Date | 10th October 1939 | |
| G.16/859. + Shorn General 1300 When Telephoning with regard to this letter please ask for Extension number............... 130 TELEGRAMS: Ballooning, South Farnborough. TELEPHONE: 361 Aldershot. All Stores to be addressed:— R.A.E. Siding, Farnborough Station, Southern Railway (L. & S.W. Section). All communications to be addressed to The Chief Superintendent. OUR REFERENCE: M.T./5688/R/G.T./27. YOUR REFERENCE: Lr{Mr Ellor}/SGH.{Sir Stanley Hooker}8/FEC. ROYAL AIRCRAFT ESTABLISHMENT, SOUTH FARNBOROUGH, HANTS. 10th October, 1939. Dear Hooker, 5885. Very many thanks for your letter and for the notes on wheel wobble. I am particularly interested in items (2) and (5) of these notes, and I should be grateful if you would amplify the information which they provide. In item (2) I am not clear as to the part played by the "stiffness of the steering control". Does this refer to the cornering power of the tyres or to resisting forces in the steering assembly? In the latter case it appears that the main effect of such forces would be to damp any vibrations. In item (5) reference is made to "precession torque" as a cause of the self centering of a tyre running at a slip angle. However, as long as the plane of the wheel remains vertical, I cannot see how gyroscopic forces can produce self centering. If you could kindly let me have a few more details about these points I should find them very helpful. I should also be glad to accept your kind invitation to come up to Derby and discuss matters with your staff. Perhaps you will let me know which day Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Could you see Temple on Tuesday? S.G.H. | ||