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).
Weight comparison table for Lovejoy and 20 HP Rear shock damper components.
| Identifier | ExFiles\Box 105\3\ scan0154 | |
| Date | 6th January 1931 | |
| X5520 SHOCK DAMPER WEIGHTS. 6.1.31. X823. X832. Lovejoy & 20 HP Rear. DETAILS WEIGHED. LOVEJOY. 20 HP. REAR. Cylinder only. 7 lbs. 10 ozs. 2 lbs. 12 ozs. Cylinder only, complete with end cover, top cover, valves, etc. 8 lbs. 13 ozs. 4 lbs. 2 ozs. Piston - complete 1 lb. 14 ozs. 1 lb. 6 ozs. Inter-lever - complete 1 lb. 8 ozs. 13 ozs. } Main Lever - complete 1 lb. 13 ozs. 1 lb. 15 ozs. } TOTAL = 14 lbs. 0 ozs. 8 lbs. 4 ozs. DAMPER COMPLETE = 13 lbs. 15 ozs. 8 lbs. 3 ozs. + Combined these wts. are comparative. | ||