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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).
Drawing of a Dunlop 72R wire wheel with dimensions and specifications.

Identifier  ExFiles\Box 159\3\  scan0029
Date  26th January 1939
  
TITLE: DUNLOP 72R. WIRE WHEEL

DIMENSIONS & SPECIFICATIONS:
4.50-16
.687"
.500"
24 Front spokes SP{Mr Spinney}288
±.016"
2.747
2.407"
60°
.891"
.669"
48 Rear spokes SP{Mr Spinney} 288.
5.50"
72 R type shell as CDO 3174
.375"
(.665)
(.431)
10° DRILLING ANGLE
54 HOLES ZODIALLY SPACED AND 18 HOLES LEVEL
18 HOLES EQUALLY SPACED AND STAGGERED
7/32 DIA HOLES C/SUNK ON INSIDE AT 60°
Spoking diagram markers: A, B, C, D

NOTES:
Spoking as S455 but with substitution of an additional pair of rear spokes in place of each balance weight.

MODIFICATIONS:
MODIFICATIONS.
7 - 31/2 dia valve hole changed to std. size

TITLE BLOCK:
ROLLS-ROYCE
DRN JRS
CHD
APP
26-1-39.
VI.

DRAWING NUMBER:
CDS 1573
SUPERSEDING CDS 1551
  
  


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