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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).
Letter to G.W. Hancock in France discussing test results and modifications related to torque reaction dampers on the Phantom and 20/25 models.

Identifier  ExFiles\Box 11\5\  05-page163
Date  17th September 1934
  
42941

G.W. Hancock, Esq.,
Hotel de France,
Chateauroux,
Indre,
France.

HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}16/KW.17.9.34.

28-EX

Thank you for your notes on the Phantom.

We are very interested to observe the improvement you have made by fitting torque reaction dampers.

One point is not very clear from your report - how much good or otherwise does the Central front engine support make in these tests ? One would assume that as it is a metal-to-metal contact it would take the weight of the engine and so increase the roughness without materially contributing towards the stability of the front end. I want to know this because I am carrying out parallel experiments on the 20/25. You do not say in either test (1) or (2) whether the booms were made worse.

It is of course a reversal of the results on the 20/25 when you say that making the torque reaction damper solid does not bring up booms any worse than when they are loaded with 35 lbs. However, we shall go over our tests again.

We have to-day sent out Pattinson and Hamilton. Hamilton is nearly out of his time and so we have promised to let him come back in a week so that he can fix up about getting another job. We shall have to fix you up with somebody temporarily until Roberts gets back.

Can you give us any more information on tyre wear with the axle you are running on 28-EX ?

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
  
  


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