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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).
Poor efficiency of a new worm and nut steering system fitted to a Peregrine.

Identifier  ExFiles\Box 2\2\  B002_X 115 150-page31
Date  16th May 1933
  
To RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}

Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}13/KT.16.5.33.

PEREGRINE STEERING.

We have tested the new worm and nut steering now fitted to Per.4. for efficiency. Attached is a copy of the results. You will observe that nowhere XXX the efficiency of the steering is higher than 54.%. The Phantom efficiency under similar conditions is 75%, and as this nut has actually a higher helix angle, its efficiency should certainly not be below 75%. Will you therefore please see what can be done to improve the mechanism of F.100894. It is of course possible that the worm and nut may not be at fault, but we have never previously found any appreciable loss of efficiency elsewhere.

Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}
  
  


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