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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).
Vehicle components including shock dampers, dashboard brackets, axle performance, and spring behavior.

Identifier  ExFiles\Box 5a\2\  02-page205
Date  13th May 1930
  
Handwritten notes:
To: Hc/Rm.{William Robotham - Chief Engineer}
From: S.H.M.
By mail By YS & WD{Mr Wood/Mr Whitehead} Returned to
A/C noted DR
E noted C.B. By hand
Hôtel de France, HS{Lord Ernest Hives - Chair}
Châteauroux.
13/5/30.

Typed text:
We have received your letter Hs{Lord Ernest Hives - Chair}/221/Ld.11/5/30. Our report on the shock damper connecting links may be puzzling. In as much as the oil grooves, etc. were altered to allow more freedom of oil. We have not altered the bijurs, and the conclusion we have come to is that if the connecting links are fitted up dry, it appears that in some cases the oil will not flow. What we did was to well oil the connecting links, and before finally connecting up, to give a charge of the Bijur, allowing the oil to flow through the shock absorber arm. It has not since dried up. Whether this is due to air locks forming or not, it is hard to say.

We have fitted the dashboard brackets whilst at Paris. I took the opportunity to have these fitted whilst I was there. It was a very difficult job, chiefly due to the scuttle being lined on either side with steel plates. These had to be cut away to get access to the bolts, and it was not until 6.30 last evening that I was able to leave Paris.

The new axle fitted seems to be quiet, and so far we have not been able to definitely observe any periods. Mr. Rant is returning the old axle via the general transport, and the transport people at Boulogne are dealing with the matter, therefore everything should be O.K. I believe Mr. Rant is trying to square the job up so that there will be no trouble at all when the car returns with the new axle.

We have taken the reading of the height of gear box in relation to the frame, and will check this up as you suggest at the end of the next 5,000 miles. You will see in my 5,000 miles report, that the top rubber on the o/s has started to bulge out, showing that there is more compression on that side than on the n/s. The bulge is not great, but it is definitely there.

With reference to the hunting on the front springs, this only occurs at high speeds, and as you are aware, when hitting a very uneven surface of the road. We consider that the working of the car on a road such as from Orléans to Paris, is really ideal. But for a little too much flexibility of the front. We have no springs here to increase the low pressure with the RO{C. C. Rose - Export Manager}-H2 type of shock damper. If you think that it is absolutely necessary, we will have a go at it.

We have taken the reading of the buffer clearances with normal load front and rear. The front buffer clearance is 1.5/8", and the rear 2.3/4", and

Signature:
C.W.Hancock
  
  


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