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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).
Proposal to strengthen the gearbox's 3rd motion shaft following a failure, detailing modifications.

Identifier  ExFiles\Box 179b\1\  img135
Date  2nd November 1932
  
P/ FROM HDY{William Hardy}
C. to SG.{Arthur F. Sidgreaves - MD} WGE. HS.{Lord Ernest Hives - Chair} E-B

HDY{William Hardy}1/W2.11.32.
5573
V 7310.

P. 2. GEARBOX. STRENGTHENED 3rd. MOTION SHAFT.

With regard to the failure of the 3rd. motion shaft on 19-EX. after 23,000 miles, in addition to the increased radius suggested in HS{Lord Ernest Hives - Chair}/GKY12/KT311032, we think that new shafts should be strengthened by the modifications shown on R.{Sir Henry Royce} sch. 3557. herewith, the principal feature of which is increased size of spline.

With the increase of shaft we show the stress is reduced 26%.

HDY.{William Hardy}

Similar to P.R.S.ch.216
WDF 9-11-32.
  
  


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