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).
Comparison of steering effort required for models 27-EX and 22-EX under various conditions.
| Identifier | ExFiles\Box 154\1\ scan0086 | |
| Date | 30th November 1933 | |
| COMPARISON OF STEERING 27-EX & 22-EX. 30.11.33. PULL REQUIRED ON STEERING WHEEL TO TURN ROAD WHEELS. (LBS). WHEELS ON GREASED PLATES. Position of Road Wheels. 27-EX. 22-EX. Straight pulling to right. 10.0 9.0 Straight pulling to left. 10.0 10.0 Left lock pulling to left. 18.0 12.0 Left lock pulling to right. 9.0 10.0 Right lock pulling to right. 16.0 12.0 Right lock pulling to left. 10.0 8.0 Tyre Pressures. 27-EX. N.S. 34 lbs/sq.in. O.S. 33 lbs/sq.in. 22-EX. N.S. 39 lbs/sq.in. O.S. 41 lbs/sq.in. WHEELS JACKED OFF GROUND. Position of Road Wheels. 27-EX. 22-EX. Straight pulling to right. 8.0 3.5 Straight pulling to left. 8.0 4.5 Left lock pulling to left. 10.0 5.0 Left lock pulling to right. 10.0 4.5 Right Lock pulling to right. 10.0 4.0 Right Lock pulling to left. 10.0 4.5 Load on side steering tube 22-EX - Nil. Load on cross steering tube 22-EX - 8 lbs. 27-EX in left lock position front bolt of front ball pad fouls swinging arm and increases the load required to turn wheel at left lock, when turning in direction of lock, from 10 to 18 lbs. with wheels jacked off ground. 27-EX. SIDE STEERING TUBE FRICTION REDUCED FROM 8 LBS. to NIL. Position of Road Wheels. Wheels off Ground. Wheels on Greased Plates. Straight Pulling to Right. 6.0 10.0 Straight Pulling to left. 6.5 10.0 Left lock pulling to left. 9.0 17.0 Left lock pulling to right. 9.0 8.0 Right lock pulling to right. 9.0 15.0 Right lock pulling to left. 7.0 8.0 | ||