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 front and rear dampers for 'SS' Chassis 'J2' Series, involving stronger valve springs and modified valve cover plugs.
| Identifier | ExFiles\Box 16\4\ Scan093 | |
| Date | 3rd May 1929 | |
| c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 47520 BY/HEB{H. Biraben}1/M.3.5.29. "SS{S. Smith}" CHASSIS "J2" SERIES. FRONT AXLE CONTROL DAMPER SEC:7160. REAR HYDRAULIC SHOCK DAMPER SEC:7150. 50% STRONGER VALVE SPRINGS & MODIFIED VALVE COVER PLUGS. With reference to memos BY2/G.22.4.29, Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}6/T.19.4.29, and Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}3/LG.12.4.29, herewith please receive one Blue Print of each of the following:- F.80970 Plug for Damper Casing. 2 off. F.80991 Valve Spring(Rear Hydraulic Shock Damper).4 " F.80992 " " (Front Axle/Control Damper). 4 " F.80993 Valve Cover Plug(High Pressure)Front. 2 " F.80994 " " " (Low " )Front. 2 " F.80995 " " " (High " )Rear. 2 " F.80996 " " " (Low " )Rear. 2 " Kindly produce and fit to Expl: Chassis. It should be noted that Plug F.80970 is for use on present Dampers after the Dynamic Restriction parts have been removed. BY/HEB{H. Biraben}'. HM{Capt. W. Hallam - Head Repairs} | ||