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).
Alteration instructions for the Bentley V. Clutch friction face, part number GB.4416.
| Identifier | ExFiles\Box 99\1\ scan0096 | |
| Date | 17th July 1939 | |
| 412. To By/CRL.{C. R. Lisson} c. to HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler}1/JH.17.7.39. Bentley V.{VIENNA} Clutch, Friction Face GB.4416. Please alter the above as follows :- Delete conical face, and make disc .550 thick, Fig.1. Reason to reduce risk of distortion when hot, and will also simplify machining. Drill through .2656 holes, Fig.2. Reason to allow escape of oil. Please bring in this alteration as soon as possible, but no existing material need be scrapped. The corresponding part Rm.{William Robotham - Chief Engineer}575 (now being redrawn with a GB. number) should be treated in the same way. [Drawing annotations] .125 R .550 ±10 .265 ±10 3 HOLES -30° -30° Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} | ||