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).
Tyre summary report detailing the results of two 15,000-mile tests on a Bentley vehicle.
| Identifier | ExFiles\Box 97\5\ scan0129 | |
| Date | 20th March 1939 | |
| 4006 To. Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls} (crossed out) CHATEAUROUX. 20.3.39. 8.B.V. - BENTLEY. Tyre Summary. Ist. 15,000 MILES TEST. N.S.F. Standard India 6.50 x 16 Worn to cord 3222 N.S.R. " " " " " 4430 O.S.R. " " " " " 4430 O.S.F. " " " " " 5325 N.S.F. " " Worn out 2934 N.S.R. Special India 4 ply " Worn to cord 1978 O.S.R. " " " " " 1892 N.S.R. " " 6 ply " 75% worn 3983 O.S.R. " " " " 75% worn 3983 N.S.F. " " 4 ply " 50% worn 4235 O.S.F. " " " " 75% worn 5066 N.S.R. Standard Dunlop 90 " Worn smooth 2743 O.S.R. " " " " " 2381 N.S.F. " " " Fair 1867 O.S.R. " " " Fair 1867 N.S.F. " " " Nearly smooth 4610 O.S.F. " " " Smooth patches 4209 2nd 15,000 MILES TEST. N.S.R. Standard India 6.00 x 16 800 miles left 4754 O.S.R. " " " 500 " " 4754 N.S.F. " " " Worn out 4754 O.S.F. " " " 1000 miles left 4754 N.S.F. " " " Smooth on side 3126 O.S.F. " " " Worn smooth 4318 Tyre Nos. N.S.R. Dunlop Special 4 ply 6.50x16 Burst wall O.S.R. " " " " nearly smooth 6029 3219 87. N.S.F. " " " " Worn smooth 6517 3219 87. O.S.R. Avon Special " " Damaged in accident 1098 3219 86. O.S.R. " " " " Worn smooth 6294 95 65 N.S.F. " " " " " 6385 95 66. O.S.F. " " " " Nearly smooth 3842 95 57 O.S.R. India Special " " " " 3751 95 67 N.S.R. Dunlop Special " " Wall damaged and burst afterwards 1705 284202 Various India Special " " Wall burst 2911 O.S.R. Dunlop special " " Worn smooth 5126 479F 282909 N.S.R. " " " Worn to cord 4577 31946C N.S.F. Avon Spec.4 ply balanced " Worn smooth 4050 378F 312341 O.S.F. " " " " Worn smooth 5724 545S 9553 O.S.F. " " " " Worn smooth 5724 545S 95 87. | ||