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).
Technical specification sheet comparing the brakes and wheels of Packard Super Eight and Packard Twelve models.
| Identifier | ExFiles\Box 127\1\ scan0221 | |
| Date | 21th May 1935 guessed | |
| -7- Packard Super Eight Model 1203-1204-1205 Packard Twelve Model 1207-1208 BRAKES: Type Internal - expanding on all four wheels Internal - expanding on all four wheels Operation Mechanical with vacuum booster Mechanical with vacuum booster Effective area 240 1/2 sq.in. 283 1/2 sq.in. Effective area - hand brake 240 1/2 sq.in. 283 1/2 sq.in. Size of lining: Front left wheel 15 1/4 x 1 3/4 x 1/4 16 3/4 x 1 3/4 x 1/4 Front right and both rear wheels 15 1/4 x 2 1/4 x 1/4 16 3/4 x 2 1/4 x 1/4 Material Raybestos-Primary Hyco-Secondary Raybestos-Primary Hyco-Secondary Drums 14" diameter centifuse with dust shield 14" diameter centifuse with dust shield WHEELS: Type Wire Wire or wood Size of tyre 17 x 7.00-6 ply 17 x 7.50-6 ply Recommended tyre pressure 35-40 lbs. 35-40 lbs. | ||