Rolls-Royce Archives
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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 requesting a 25/30 piston and discussing the weight of various components like springs and bearings, with comparisons to Cadillac and Bentley parts.

Identifier  ExFiles\Box 174\2\  img045
Date  23th March 1937
  
FHS { Hives's copy of a letter from Rm.{William Robotham - Chief Engineer}
e/ja {

Detroit Athletic Club
Detroit

March 23rd/37

GRY{Shadwell Grylls}:

Please send oy a complete 25/30 piston fitted with rings and in particular with the L shaped centre ring.
We have got to accept that our rear road springs are ridiculously heavy.
Two 1125 lbs rear road springs for the Cadillac 60, rate 115-lbs/in weigh 70 lbs the pair.
We have never broken a Bentley thick leaf spring on the road & unless the bump-test shews something silly we should get the 25-production sets we ordered on the Cars as soon as we can.
We should also see that Wraith figures are reasonable.
Timken bearings in hubs seem to save a great deal of weight and are perfectly reliable.
front Cadillac 60 hubs & bearings, weigh 2.89 lbs the pair.

Rm.{William Robotham - Chief Engineer}
  
  


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