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).
Letter discussing performance issues and recommendations for the Bijur Drive system on an experimental car.
| Identifier | ExFiles\Box 40\5\ Scan102 | |
| Date | 19th December 1922 | |
| Oy1-W-121922 December 19, 1922. Mr. Claude Johnson, Rolls-Royce, Limited, London, England. Attention of Mr. Royce Mr. Hives Dear Sir: Re Bijur Drive Mr. Hives has written us (HsX/L.G.4.12.22) asking about the performance of the Bijur pinion, and the maker's recommendations re mounting. Mr. Platford was gone when this letter came in, but we had, before he left, arranged a meeting here for Mr. Platford with Mr. Lansing of the Bijur Motor Appliance Company, and I believe Mr. Platford has taken back with him a sample pinion representing the best recommended practice of the Bijur Company with the information which we had at the time. I have now sent the Bijur Company the prints sent by Mr. Hives, together with a summary of his letter, and will forward their reply. Use on Experimental Car We showed Mr. Platford the ring gear and Bijur pinion which ran 13,500 miles on 102-CE. The only troubles with this device were 1 - Originally the motor was wound for too high a speed and the big coil spring was too powerful, causing the motor to slam into engagement with a great noise and causing damage to the ring gear teeth (unhardened steel) though without harming the hardened teeth of the pinion. 2 - We did not allow sufficient clearance between the end of the cylindrical spring-casing and the edge of the flywheel gear. This should be at least 1/8" when new, as there is a tendency as the cork clutch disc wears, for the casing to be screwed further in towards the flywheel, causing it | ||