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).
Inflation table for Michelin beaded edge tyres.
| Identifier | ExFiles\Box 39\2\ Scan131 | |
| Date | 3rd November 1921 | |
| KR/36.3.11.21. INFLATION TABLE FOR ALL MICHELIN BEADED EDGE TYRE Section Maximum Weight per axle Weight carried per axle Pressure per square inch. Cwts Cwts Lbs Vte Legere and 3" 9cwts 7 45 9 60 80 12 7 45 10 60 12 75 90 and 3 1/2" 16 10 45 12 60 14 70 16 75 105 18 14 45 16 60 18 75 120 23 16 45 20 60 23 75 135 31 20 45 25 60 31 75 150 35 22 45 29 60 35 75 155 45 24 45 31 60 38 70 39 80 45 95 [Watermark: COPY] [Handwritten note:] Copied from Michelin Table 23.12.21 S.P. | ||