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).
List of specifications and modifications for various vehicle components.
| Identifier | ExFiles\Box 90a\2\ Scan049 | |
| Date | 19th June 1934 | |
| - 2 - Water, oil, and petrol pipe unions. - Special locking devices, to prevent these unions working loose. Mixture control. - Modified locking of control pins. Present split pin locking is not satisfactory as regards wearing qualities. Accelerator. - Modified in order that the brake and accelerator pedal can be operated together. Wing Stays. - Made in spring steel instead of mild steel. Exhaust system. - Special straight through system with one expansion box at the rear to conform with the regulations. Hartford shock absorbers. - Front and rear in addition to RR.hydraulics. eC. 4011 Road Springs. - Unlubricated and bound with cord to increase internal friction. Rear Axle. Road Wheels. - Special high gear ratio. 11.41. [handwritten] latest thrust race [/handwritten] [strikethrough] special large diameter on the rear to increase top speed gear ratio. 4500 r.p.m. at 115 m.p.h. [/strikethrough] Speedometer. - Special calibration to suit axle ratio and large road wheels. [handwritten] Subsidiary Oil tank [/handwritten] [handwritten] Side Spare Wheel Carrier [/handwritten] - [handwritten] E/Lid.{A. J. Lidsey} Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}15/K.W.22.6.34 [/handwritten] [handwritten] Latest Front axle & Brake Toggles, Firths springs, laced with additional clips [/handwritten] - [handwritten] Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}6/K.W.19/6/34 [/handwritten] | ||