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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).
The power unit of a Lincoln car, detailing crankshaft and engine specifications.

Identifier  ExFiles\Box 173\1\  img317
Date  12th February 1934
  
COPY OF REPORT FROM Rn.{Mr Robinson} IN U.S.A. DATED 1.2.34

To Sg.{Arthur F. Sidgreaves - MD} from Hn{F. C. Honeyman - Retail orders}/Rn.{Mr Robinson}
c. to WoP.
c. to BY.{R.W. Bailey - Chief Engineer}
c. to Da.{Bernard Day - Chassis Design}
c. to Hdy.{William Hardy}

Hn{F. C. Honeyman - Retail orders}/Rn.{Mr Robinson}9/KW.12.2.34.

LINCOLN CAR.

There is a considerable amount of interest attached to this power unit, particularly as they have this year changed from a seven bearing forked big end construction, to a side by side four bearing type.

The four bearing shaft is fully balanced.

The balance weights are forged integral with the shaft.
The engine is now 3-1/8 x 4-1/2.
Firing order 1-4-9-8-5-2-11-10-3-6-7-12
Angle between the cylinders 67°
Crankshaft dimensions:
Journal dia. 2.625"
Pin dia. 2.5 Pin length 1.995 (less the 1"/rod.)
Main bearings A - 1.625" long
" B - 3.5"
Front " C - 1.875"
Distance between adjacent cylinders 3.8" approximately
" 2 & 3, etc. 5.125"
Over-all length of crank from flywheel flange to front of main bearing C 31.7"
Finished crank weight 80 lbs.
Worst period presumably 6/rev. without damper load (they have a fair hub) 2,200 R.P.M.
  
  


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