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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).
Dynamometer readings after altering the cam wheel timing on chassis 1144.

Identifier  ExFiles\Box 33\4\  Scan060
Date  4th October 1909
  
R.R. 148 (20 H) (H.{Arthur M. Hanbury - Head Complaints} 360. 16.9.09) E.P. 4941.
X1770 4000
Reads taken by Lowe on Dynamometer 4/10/09.
1144 Chassis was improved in power by altering Cam wheel 1 tooth later.
Previous timing - average in Mins. =
I.O. I.C. E.O. E.C.
3 5/6 4 3/4 21 1/4 + 5/12
Present timing - average in Mins.
I.O. I.C. E.O. E.C.
5 1/2 5 23/24 22 1/2 + 2 1/4
Revs. | Gain H.P. | Loss H.P
750 | 7.4 |
1000 | | 1.4
1250 | 1.7 |
1500 | 5.1 |
Had engine been run as long at 1000 revs. with altered timing, power would doubtless have been better than previous (signed)
LR{Mr Ellor}
  
  


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