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).
Recommended tyre pressures from various manufacturers, namely Michelin, Dunlop and Palmer.
| Identifier | ExFiles\Box 39\2\ Scan141 | |
| Date | 1st May 1922 | |
| X3538 X7602-? Hs.{Lord Ernest Hives - Chair} c. to Ev.{Ivan Evernden - coachwork} c. to Wd.{Mr Wood/Mr Whitehead} c. to Hy.{Tom Haldenby - Plant Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} Lo/50 or Grahams? I am expecting Mr. Blake of the Dunlop Rubber Co. here shortly, with a view to a full discussion on the revised pressure figures recommended by Hs.{Lord Ernest Hives - Chair} Meanwhile the figures hereunder, compiled from Michelin, Dunlop and Palmer Lists may be of interest. It will be noted the Michelin Co. made a material reduction in their recommended Tyre Pressures at the end of March, and today recommend Pressures for their Cable Tyres much below those the Dunlop Co. specify for their Cord Tyres, either Beaded Edge or Straight Side. ROY.{Sir Henry Royce} [Stamp: RECEIVED 1922] | ||