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).
Blueprint diagram for an experimental wide base rim contour for passenger car types.
| Identifier | ExFiles\Box 156\3\ scan0265 | |
| Date | 30th October 1940 | |
| WIDE BASE RIM CONTOUR FOR PASSENGER CAR TYPES EXPERIMENTAL PRACTICE. 5 1/2 - K.{Mr Kilner} DIAMETER SHOWN IS FOR 16" RIMS. TR{Capt. F. W. Turner - Finance}-10-30-40-K.{Mr Kilner} Dimensions: 5.50" ± .063" 2° 1.933" MAX. .780" MIN. .022" MIN. .156"R.{Sir Henry Royce} MAX. 20°±5' 1.00" 13.983" DIA. MAX. 5°±1° .750"R.{Sir Henry Royce} .250"R.{Sir Henry Royce} .250" 1.00" .512" MIN. .780" MIN. .031"R MIN. .250"R.{Sir Henry Royce} .420"R.{Sir Henry Royce} .770" ± .016" .406" .375"R.{Sir Henry Royce} .018" ± .031" .618/.633" DIA. 15.968" ± .015" DIA. | ||