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).
Modifications to the Phantom III rear brakes to reduce complexity and cost.
| Identifier | ExFiles\Box 92\4\ scan0368 | |
| Date | 18th September 1937 | |
| To EF. from HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} c. to Rm.{William Robotham - Chief Engineer} 306 HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth}1/VS.{J. Vickers}18.9.37. PHANTOM III REAR BRAKES. Modifications to improve Brake Strap Clearances to N.S.5141 and N.S.5147. The clearances obtained as detailed to the above scheme are one series of fouls, and the whole scheme should be reviewed previous to consideration for Production. The Phantom III Brake Assembly is too complicated and costly, and a general revision is preferred rather than slight modifications. The introduction of Phantom III Continental Type Brake Assembly, as fitted to 39-EX to R.R.Sch.994, would mean that the cost of this unit would be reduced to one third the present cost of production, or alternatively, if the present type of Brake Gear is desired, we suggest a forged Brake Shoe incorporating strap, fulcrum boss, two screwed bosses and raised bosses in place of adjusting washers should be incorporated in one forging, as shown on drawing Ex.I.104 attached. We suggest the Brake Strap Guides be deleted on all cars, as with the long fulcrum bosses employed on all straps the guides are ineffective and serve no useful purpose. Will you please give this your consideration. HPS{Horace Percy Smith - Experimental Factory Mgr}/R.{Sir Henry Royce} Hollingworth. A.{Mr Adams} F.{Mr Friese} Martindale . See me Rm.{William Robotham - Chief Engineer} | ||