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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).
Test report on high speed wobbles, examining the effect of tyre pressure with and without shock absorbers.

Identifier  ExFiles\Box 29\1\  Scan138
Date  15th October 1925
  
16/1925
4057
HIGH SPEED WOBBLES. 98NK.

STANDARD H.P TYRES. No SHOCK ABSORBERS.

Tyre Press lbs/□" | PERIOD OF WOBBLE
UP M.P.H. | DOWN. M.P.H.
35 | 58-64 | 64-56
40 | 60-63 | 63-58
45 | 65-68<-VIOLENT-> | 68-64
50 | 68-72<-VIOLENT-> | 72-68
55 | 72-75<-VIOLENT-> | 75-68

STANDARD R.R. SHOCK ABSORBERS. @50lbs.

TYRES. 55lbs/□" | No WOBBLES.
Tyres 45lbs/□" | 76-77 | 72-70.

2325
465
1860

G.H.R.
R.B. 15/10/25-
  
  


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