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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).
Graph showing the results of torsion tests performed on a 'Myth' frame.

Identifier  ExFiles\Box 110\2\  scan0056
Date  15th December 1943
  
TORSION TESTS ON MYTH FRAME

NO. 1 TEST (DEC '41) AS RF 2259. RATE BETWEEN FRONT AND REAR WHEELS WAS 384 LB-FT/DEGREE

NO. 2 TEST (14.12.'43) WITH FRONT MEMBER BOXED IN TO PL.1127. RATE BETWEEN FRONT AND REAR WHEELS WAS 538 LB-FT/DEGREE

NOTES
a) FRONT PAN (WHICH IS TO BE RUBBER MOUNTED) WAS NOT FITTED FOR THESE TESTS
b) TORQUE ACTUALLY APPLIED WAS 268 LB-FT FOR TEST NO 1. AND 406 LB-FT FOR TEST NO 2

Graph Y-Axis: TWIST PER 1,000 LB-FT (DEGREES RELATIVE TO REAR WHEELS)
Graph X-Axis: DISTANCE FROM FRONT WHEELS (INCHES)

Graph Data Points (from left to right):
Test 2: 538, Test 1: 384
Test 2: 812, Test 1: 688
Test 2: 1270, Test 1: 1140
Test 2: 2620, Test 1: 2420
Test 2: 1475, Test 1: 1140

Graph X-Axis Labels (from left to right):
FRONT BODY MOUNTING BRACKETS
CENTRE OF X
3RD BODY MOUNTING BRACKETS
REAR WHEELS
FRONT OF REARMOST CROSSMEMBER

Side Label: RATES FROM REAR WHEELS LB-FT/DEG
  
  


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