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).
Performance and wear of Rapson tyres fitted to chassis 98 NK.
| Identifier | ExFiles\Box 39\1\ Scan129 | |
| Date | 21th June 1924 | |
| POSITIONS AND NUMB S OF RAPSON TYRES ON CHASSI 98 NK. TABLE DATA: HEADER: R.R. No., MAKERS COVER No., MAKERS TUBE NO., WHERE FITTED., REMARKS. ROW 1: 1, XO.82424, 68521, N.S.F., 2nd. tread commenced to shew after 1779 miles. Worn right down to canvas after 4114 miles. Tyre removed. Total loss of air pressure 3 lbs. ROW 2: 2, XO.82414, 68497, O.S.F., 2nd. tread commenced to shew after 1779 miles. Worn right down to canvas after 4114 miles. Tyre taken off. Total loss of air pressure 6 lbs. ROW 3: 3, XO.82327, 68502, N.S.R., Tyre worn right down to canvas after 1583 miles. Tyre removed. Total loss of air pressure 8 lbs. ROW 4: 4, XO.82437, 68520, O.S.R., 2nd. tread beginning to shew after 1021 miles. Tyre burst after 2025 miles. Worn right down to canvas. Total loss of air pressure 3 lbs. ROW 5: 5, XO.82301, 68139, N.S.R., 2nd. tread shewing completely after 1467 miles. Punctured by half horseshoe after 2480 miles. Tyre was worn right down to canvas. Tyre removed - loss of air pressure 2 lbs. ROW 6: 6, XO.82336, 68190, N.S.R., 2nd. tread shewing completely after 887 miles. Mileage to date 1001. Still running. ROW 7: 7, XO.82321, 68244, O.S.R., 2nd. tread shewing completely after 1467 miles. Worn right down to canvas after 2793 miles. Tyre removed. Loss of air pressure 5 lbs. ROW 8: 8, XO.82308, 68305, O.S.F., Mileage to date 917. Still running. FOOTNOTE: Approx. average speed during tests 38 m.p.h. | ||