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).
Electrical experimental record sheet for a contact breaker lever fitted with Spaulding's Fibre.
| Identifier | ExFiles\Box 69\1\ scan0404 | |
| Date | 24th September 1926 | |
| ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No:- 4646 contact breaker lever fitted with Spaulding's Fibre. Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. 22-4-26 | 12EX | | Fitted to 12EX. Dimensions before running top .294" bottom .292" | 195 3-6-26 | " | 30-6-26 | Car sent to France for 10000 mile test | | 777 | 582 | | | | | | 2684 | 2489 | 2489 24-9-26 | - | | measurements top .257" bottom .252 | | 8769 | 16,085 | 18,574 Average wear = .038" Proportional approx wear for 10000 mls = .021" This wear is more than 100% more than that experienced with other bone grey fibres | ||