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).
Secret memo regarding a new design for steel artillery wheels on Dunlop hubs, involving modifications to the hub and brake drum.
| Identifier | ExFiles\Box 53\3\ Scan175 | |
| Date | 18th July 1924 | |
| +4586 To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} S E C R E T. R5/M18.7.24. c. to CJ. BJ. RG.{Mr Rowledge} HS.{Lord Ernest Hives - Chair} PN.{Mr Northey} C. H.{Arthur M. Hanbury - Head Complaints} E.A.C. 2 & 3. RE. STEEL ARTILLERY WHEELS ON DUNLOP HUBS. X.4586 X.9820 (1) As mentioned in a recent memo. we now have a design that I think will prove satisfactory for fitting the above. It entails alterations to the brake drum, and to the present standard wire wheel hub. (2) The cone is nearer the centre of the car, per-mitting the actual steel wheel to be almost exactly the usual standard, and yet keep the track almost exactly our wire wheel standard. (Centre point steering will there-fore be as desired). (3) Upon my suggestion Mr. Day has found a good way of shortening the hub by 1", by re-arranging the locking parts, and economising the room so that with the modif-ication in (2) we get correct track, better conditions for carrying the load, same control, and with hubs 2" narrower overall, so that they are level with the splashers, and have a good appearance. The second design for this will be sent to Derby we hope on Saturday. The bolted on type sent recently will therefore not be needed. R.{Sir Henry Royce} | ||