Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Proposal for a partly balanced and stiffened crankshaft for the Phantom II engine.

Identifier  ExFiles\Box 14\2\  Scan133
Date  17th September 1931
  
No Copying

RECEIVED 1931 SEP O10.
HS{Lord Ernest Hives - Chair}

BY.5/G.17.9.31.

PHANTOM 11 - CRANKSHAFTS.
---------------------------

It is desirable to bring in at an early date a crankshaft which is partly balanced. In order to do this it means that we must :-

a/- Have a stiffened crankshaft on pins and journals, the stiffening up being limited by what can be obtained from the existing forgings.

b/- To approximately half balance this crankshaft as a unit.

The foregoing gives the best compromise we know of. It will certainly relieve the bearings, and will therefore give improved performance.

BY's Department are making a drawing of a crankshaft which can be made from the present forgings to fit in with the above requirements. E.{Mr Elliott - Chief Engineer} has promised to send sketch.

This proposal affects connecting rods and crankcases, as well as crankshafts, as it is not reasonable to add a balance weight to the present type P.11 crankshaft, as these weights would bring down the natural period of the crankshaft into running speeds.

BY.{R.W. Bailey - Chief Engineer}
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙