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).
Engine failures, corrosion, and vibrations, comparing Pontiac, Cadillac V12, and V8 engines.

Identifier  ExFiles\Box 173\4\  img066
Date  20th November 1935 guessed
  
(2)
A
Telephone Cadillac 3000

hotel Book-Cadillac
Detroit
NATIONAL HOTEL MANAGEMENT CO. INC
RALPH HITZ PRESIDENT
HOTELS NEW YORKER, LEXINGTON, NEW YORK, NETHERLAND PLAZA, CINCINNATI, RITZ CARLTON, ATLANTIC CITY, VAN CLEVE, DAYTON

consequent failure; sometimes in a very short mileage the metal completely disappears. On an engine that was not an oil user does not use much oil & hence felt a high acid content the bearings corrode when the engine is stationary. Pontiac had changed their material & very hurriedly changed back to whitemetal. If the corrosion does not take place the life is 1 1/2 times that of whitemetal.

The Cadillac V12 connecting rods with cast iron runs at 80 m.p.h where life is considered adequate. They give no trouble & service.

As regards V8 engines these originally had periods rough periods on the drive due to crankshaft lateral deflections. 100% balance of centrifugal masses & piston couple helps considerably but the flywheel plate vibrates at high compression ratios. Pontiac cured this (the piston) but when the crankshaft deflection was eliminated & the bearing loads induced initial ones became apparent. These
  
  


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