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).
Responding to a report on the Phantom II Low Inertia Slipper Drive.
| Identifier | ExFiles\Box 137\4\ scan0074 | |
| Date | 4th January 1930 | |
| Hs{Lord Ernest Hives - Chair}/GWH{George W. Hancock - Head Chateauroux} - from SFT.{Mr Swift} C. Wor{Arthur Wormald - General Works Manager} (crossed out) C. EY (crossed out) C. Mx.{John H Maddocks - Chief Proving Officer} (crossed out) x634 SFT.{Mr Swift}6/B.4.1.30. x634 x7020 x4499 Phantom II. Low Inertia Slipper Drive. Thanks for your report Hs{Lord Ernest Hives - Chair}/GWH{George W. Hancock - Head Chateauroux}/MJ.3.1.30. in which I note that generally you consider the spring drive is a good job, but draw attention to the following points. a.{Mr Adams} "That the unit when stripped down shows that the spring plate is scaly". I would like to point out that we have found this out ourselves and only six of such plates have been fitted. The remainder have been cleaned, or we have fitted the new plates which are free from scale and which only came to hand quite recently. b. "The front bearing shows one or two hard marks". We do appreciate the importance of this job, and as you know we are using special arbors to ensure the alignment of the two bushes, taper and serrations. If you can spare the time I should be glad if you would come on the job and suggest in what way we can still do this alignment better. c. "Oil retaining flange on the fan pulley not concentric with gear case". We have done our utmost to ensure concentricity and are actually getting some tackle made to improve our present method. We had no idea there was a jig in the Expl. Dept., although we did send over to them for the other tackle in connection with the slipper drive job. We will make arrangements to borrow this right away. d.{John DeLooze - Company Secretary} "The spring driving load poundage varies from 21 lbs to 25 lbs". Do I understand that you tried two sets of springs in the same drive? We do not quite understand this point and should be glad if you would come over and explain it to us. In any case the drawing states that the slipping loads should be from 20 lbs to 25 lbs. e.{Mr Elliott - Chief Engineer} "With reference to your complaint that there are no markings". We had already found out that it is necessary to specially mark parts for re-fitting after dismantling, and this has been done on recent slipper drives. | ||