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).
Tests and specifications for Phantom side steering tube springs.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan005 | |
| Date | 7th July 1926 | |
| To B.J. From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} PN.{Mr Northey} c. to CWB. EY. c. to EP.{G. Eric Platford - Chief Quality Engineer} MX.{John H Maddocks - Chief Proving Officer} ORIGINAL. Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/L.G.7.7.26. PHANTOM - SIDE STEERING TUBE SPRINGS. 48430 / 48450 We believe that, for a number of reasons, tests at present being carried out in London on side steering tube springs may be misleading. In the first place, in order to ensure that each type of side steering tube spring is erected correctly, there are a number of precautions which should be taken. Owing to our familiarity with the job, we have not realised that exact instructions ought to be issued when fitting any but the standard springs - we are however immediately dealing with this point. The basis of all the numerous side steering tube springs which we have evolved is that the load on the ball end in the static position should be 300 lbs. Now it is clear that in order to produce this result, a 1500 lbs. spring will have to be allowed 2.3 times as much initial set up as a 3500 lbs. (or standard) spring. However, there is only one drawing in existence dealing with this point and that shews clearly the minimum set up required with the standard spring. This, as is shewn on the attached sketch, is .188. There is no drawing however shewing that with the 1500 lbs. spring, distance X should be .440", and it is therefore only natural that anyone contd :- | ||