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 from Hardy Spicer & Co. Ltd. discussing weight reduction options for a sample shaft.
| Identifier | ExFiles\Box 87\3\ scan0031 | |
| Date | 10th April 1935 | |
| H.{Arthur M. Hanbury - Head Complaints} Grylls. We should follow up and order another one. RM{William Robotham - Chief Engineer} ALL COMMUNICATIONS TO BE ADDRESSED TO THE COMPANY. Telegrams & Cables: "AUTOJOINTS, BIRMINGHAM" Code: BENTLEY'S PHRAZE. Telephone BIRCHFIELDS 4504/8 (5 LINES) Hardy Spicer & Co., Limited. Registered Offices and Works: Birch Road, Witton, Birmingham, 6. Manufacturers & Patentees of THE SPICER UNIVERSAL JOINTS & PROPELLER SHAFTS. Manufacturers & Patentees of THE HARDY FLEXIBLE COUPLINGS & PROPELLER SHAFTS. Manufacturers & Patentees of THE BRITISH BOUND BROOK OIL-LESS BEARINGS. Manufacturers & Patentees of COMPO OIL RETAINING BEARINGS. Our Reference JAD/MH.{M. Huckerby} Your Reference Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}26/KW. April 10th.1935. Messrs.Rolls-Royce Ltd., DERBY. Dear Sirs, We thank you for yours of the 8th instant. The sample Shaft was approximately 4 lbs heavier than our standard by the special end yokes made to fit your existing parts. We can get another 2 1/2 lbs out by a hollow shaft end where the tube spigots. We do not know how much lighter 'very little' is, but put at 2 lbs with standard ends and hollow spigot, we should be 8 1/2 lbs lighter. All we can do with the special type of end yokes fitted, is to cut out the 2 1/2 lbs referred to, and if you do not use the whole of the spline movement, we could shorten both the male and sleeve portions. By scaling your print we get a compression of 1/8" and extension of 1/4" and we have provided compression of 1/8" and extension of 3/4". Half an inch of both parts may save another 1 lb. So the total possible looks like 9 1/2 lbs lighter with standard ends, and lightened spigot. Yours faithfully, p.p. Hardy Spicer & Co.,Ltd., J.A. Daniell Director. | ||