Steering test with alterations to the lean of pivots.
| Identifier | ExFiles\Box 11\2\ 02-page236 | |
| Date | 4th May 1929 | |
| To Hs {Lord Ernest Hives - Chair} and Rm. {William Robotham - Chief Engineer} From G.W.H. X2941 Hotel de France Chateauroux(French test region) Indre 4/5/29 84 STEERING TEST WITH ALTERATION TO THE LEAN OF PIVOTS PIVOT LEAN 1° LOAD ON CROSS STEERING TUBE 7.25 LBS TOE IN .125" FRONT TYRE PRESSURE 45 LBS SELECTIVINESS NOT GOOD DECREASED 25% SHOCKS ARE REDUCED 10% SLOW SPEED AND SHUNTING 15% HEAVIER. JELLYING INCREASED 20% JOGGLES GENERALLY REDUCED 25%. PIVOT LEAN 4° STEERING LOAD ON CROSS STEERING TUBE 7.25 LBS TOE IN .125". FRONT TYRE PRESSURE 45 LBS. SELECTIVINESS VERY GOOD SAY 100% SHOCKS ARE VERY MUCH INCREASED 50% SELF CENTERING 100% SLOW SPEED AND SHUNTING 100% NO SIGN OF SLOW SPEED WOBBLES CRITICAL SPEED 58-64 M.P.H. OCCASIONAL PERIODS. BAD PERIOD OF JOGGLES AT 50 M.P.H. JELLYING SLIGHT PERIODS. JOGGLES GENERALLY INCREASED 25%. SHOCKS INCREASED 50%. 2 1/2 ° lean of pivot is the best compromise all round. 3° brings up joggles too much. The results are based on the general running of the car previously G.W.H. G.W.H. | ||
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).