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).
Steering issues like 'joggles' and 'sponginess' on the 35-EX Phantom III, and considering adjustments to spring stiffness.
| Identifier | ExFiles\Box 95\1\ scan0395 | |
| Date | 11th April 1937 | |
| 350a (Also in 300a) FJH{Fred J. Hardy - Chief Dev. Engineer} HOTEL DE FRANCE. CHATEAUROUX. Indre. FRANCE. Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux}/IMW{Ivan M. Waller - Head of Chateauroux}/5/JAB. 11th April 1937. To Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} 35-EX. PHANTOM III. STEERING. Thank you for your memo Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}17/AP.6.4.37. We have found that with the rating of the springs doubled, joggles are in evidence on bad bumps on straight roads as well as corners, and the steering spoiled. It looks as if we must accept either the joggles on corners or a slightly spongy steering. The sponginess only worries us at high speeds on cambered and uneven surfaces. We do not think it would be complained of in England. We might try slightly stiffer springs with the movement reduced in proportion. Going to double the rating is too much. The present ratio of movement to rating seems good i.e. 0.230" and 2.600 lbs/ins. ---------- Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux}/IMW.{Ivan M. Waller - Head of Chateauroux} | ||