Scheme showing the addition of friction to 'X' steering ball pins, including an enlarged ball and increased spring force.
| Identifier | ExFiles\Box 67\3\ scan0007 | |
| Date | 28th September 1926 | |
| TOTAL FRICTIONAL TORQUE (TWO ENDS) ASSUMING µ = .04 WITH 600 LB SPRING = 60 LB. INS. EXP. DEPT. REQ. 400, 500 & 600 LB. SPRINGS HERE 600LB SPRING WITH ENLARGED BALL GIVES 2/3 OF REQD FRICTION DIA. OF BALL INCREASED FROM 1.075 TO 1.250 BEARING AREA INCREASED 47% EXISTING PIECE EXISTING PIECE FOR THIS LARGER END TO CLEAR BRAKE DRUM FITTED WITH EXP. SQUEAK DAMPER & WELL-BASE WIRE WHEEL 'X' STEER'G LEVER WILL REQ. TO BE LENGTHENED .750 WITH CENTRE OF BALL BROUGHT IN TOWARDS ¢ OF CHASSIS .400 & DROPPED .225 SCHEME SHOWING ADDITIONAL FRICTION ADDED TO 'X' STEER'G BALL PINS. EXISTING BOLTED NUTS INCREASED 0.075 STAMP: ROLLS-ROYCE LIMITED PRINT ROOM 28 SEP 1926 DERBY. | ||
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).