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 modifications and their completion status for the Phantom III model.
| Identifier | ExFiles\Box 161a\4\ scan0148 | |
| Date | 26th October 1936 | |
| A.A.236421 PHANTOM III - CONTINUED. Tangent flank cam form with .950" base circle x 1.375" tappet radius. Completed. Modified main lever to switch box. Cancelled. Modified switchbox flexible conduit. " Foot switch to suit English and Continental dimming requirements. " Mod. to bell crank lever on yoke piece to give increased movement. Completed 15.9.36 Modified leverage to front and rear brakes. Completed. Cheapened side spare wheel carrier. " Hardy Spicer type propeller shaft - to reduce cost. Completed 26.10.36. Further strengthening of universal ring for 2nd speed coupling. Completed. Revised exhaust valve for four port cylinder head. Completed 6.10.36. Low stress valve springs. " 10.10.36. Modified tail pipe - stainless tube. " 8.10.36. Lightened accelerator pump gland spring. " 15.10.36. Stronger throttle spring. " 19.10.36. Stiffer filter by-pass spring. " 26.10.36. Modified tail pipe and suspension - smaller diameter and silent bloc support. " 26.10.36. Mods. to push rod ball ends to improve lubrication. " 15.10.36. Additional pressure filter element. " 26.10.36. | ||