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).
Material and design changes for a Sump Drain Plug, including a new locking mechanism.

Identifier  ExFiles\Box 19\4\  Scan168
Date  20th August 1930
  
R.{Sir Henry Royce}
c. Sg.{Arthur F. Sidgreaves - MD}
c. Hs.{Lord Ernest Hives - Chair}

47772'
BY1/G.20.8.30.

L.H. P.11. SUMP DRAIN PLUG Lec. 2788.

The above plug was instructed and made in mild steel, nickel deposit finish, which made Mr. Hancock mistake it for aluminium, but I did not like the unlocked phosphor bronze insert, and as we had to order to production I arranged the insert with a shallow hexagon to enable us to lock it positively by a stamped out plate secured to the crankcase by two small countersunk screws, locked by turning metal into the groove for screw driver.

We are instructing that R.{Sir Henry Royce} specifies viz. plug screwed into aluminium direct, with coarse thread, experimentally.

BY.{R.W. Bailey - Chief Engineer} [initials]

[STAMP: RECEIVED AUG 20 1930]
  
  


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