Typed letter from G.W.H. discussing steering spring settings, lengths, and test results for joggles and jellying.
| Identifier | ExFiles\Box 11\2\ 02-page220 | |
| Date | 29th April 1929 | |
| To Hs. {Lord Ernest Hives - Chair} and Rm. {William Robotham - Chief Engineer} From G.W.H. 42941 Hotel de France Chateauroux(French test region) Indre 29/4/29 "STEERING" In your letter of the 23 rd you state that the best results have been obtained by setting the spring up in the cross steering tube .245". It is evident that 2 series of springs are being used the springs fitted in 22 EX are 3.125" free lengh. They were set up .1562" this included one washer of .010" thick. it left .080" to be taken up by the adjusting screw. Therefore our working lengh of spring is 2.8" set up .2362"? In our tests that we gave you we increased the set up by .050 on either side thus making the working lengh 2.750" which gave us a load at the steering wheel of 6.5 to 7 lbs. We should say therefore that we arrived very near to your solution of the correct load. We have today tried the car with the worn out tyres on the front to verify the joggles and/jellying. With these tyres we obtained less joggles and practically no jellying. We did this because the car had started to jelly and choose what we did we could not stop it alltogether. We have found that to obtain definite results it is necessary to run at least 100 miles before reliable results can be obtained. We are now setting the new cross steering tube and fitting the new Bijurs. We have had a lever made for the front brake equal-izing shaft to carry on with the brakes test. G.W.H. | ||
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).