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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).
Polar plot diagram of the load on intermediate journals for a flat 12-cylinder engine at 3500 RPM.

Identifier  ExFiles\Box 115\2\  scan0512
Date  16th November 1939 guessed
  
FLAT 12 CYL. ENGINE - LOAD ON INTERMEDIATE JOURNALS B.C.E.F. @ 3500 R.P.M
JOURNAL B - O
JOURNAL C - [red dot symbol]
JOURNAL E - O
JOURNAL F - [red dot symbol]

GIVES MAGNITUDE & DIRECTION OF LOAD WHEN N°1. PISTON IS ON FIRING T.D.C.
N°1
N°6
N°1
N°6

BORE 3½
STROKE 4½
CONN ROD / CRANK 4.08

WT. OF PISTON, RINGS, 600 AND PW 1.61 lbs
(red text: 120)

CONN ROD WEIGHTS -
FORKED | PLAIN 570
(red text: 90)
LITTLE END 0.8 | 0.75
BIG END 2.0 | 1.27

BEARING DIMENSIONS
2.75" dia x 1.25

FIRING ORDER
A.{Mr Adams} 1 4 2 6 3 5
B. 2 6 3 5 4 1.

AXIS: LBS, scale from 4000 to -4000

PLOT DATA (black text / red text):
0/240, 30/270, 60/300, 80/320, 90/330, 120/360, 150/390, 180/420, 210/450, 250/480, 260/500, 270/510, 300/540, 330/570, 360/600, 390/630, 420/660, 450/690, 480/0, 510/30, 540/60, 630/150, 660/180, 690/210

SHEET 4.
  
  


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