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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).
Micro-examination report detailing hardness and other tests performed on RE Model Crankshafts.

Identifier  ExFiles\Box 63\4\  scan0129
Date  25th September 1930
  
MICRO-EXAMINATION REPORT.

To-Hgs
c. HS{Lord Ernest Hives - Chair}

X44.99

M.711
25th September, 1930.

RE MODEL CRANKSHAFTS.

As requested, we have made a series of hardness and other tests on the above. The details are given below, together with particulars of tests which have been made previously on Nitralloy and nickel case hardening steels.

The shafts which were sent to us for test were all labelled as follows :-

Des. 995. Model of Des. 989.
0.295" webs. Flywheel R.P.M. 400.
Stroke 6". Flywheel inertia increased by 30%.

TABLE I.
Matl. Mark. Crank No. No. of Reversals Brinell on flanges.
Rear end. Other end.
S/NCR 3 66,700 331 331
S/NCR 4 111,360 302 302
S/NCR 5 91,420 302 302

S/AL 1 79,200 269 269
S/AL 2 154,120 269 269
S/AL 3 218,220 269 269
S/AL 4 174,860 269 269

VNCA 2 84,340 321 321
VNCA 3 85,700 321 321
VNCA 4 65,380 321 311

S/ZN 1 80,340 217 217
S/ZN 2 33,760 207 207
S/ZN 3 72,100 269 255
S/ZN 4 35,760 201 207
S/ZN 5 48,580 217 241

S/ZNCR 1 106,840 331 321
S/ZNCR 2 74,380 331 331
S/ZNCR 3 40,160 285 285

Contd.
  
  


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