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 | ||
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).