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).
Test rig for a fabric coupling, including a reference to drawing LeC.2059.
| Identifier | ExFiles\Box 66\4\ scan0149 | |
| Date | 5th May 1925 | |
| TO EX. HS. {Lord Ernest Hives - Chair} FROM AJS. X8305 AJS1/M5.5.25. TEST RIG FOR FABRIC COUPLING. X8305 We send herewith drawing LeC.2059. shewing a simple form of testing mechanism for EAC. or other fabric coup- lings - (or for testing any other parts similarly.) With this scheme it is thought that we should produce a loading in the coupling approximating more nearly in character to that to which actually comes on it in practice on the car. The mechanism consists of a means of applying an alternating torque to the coupling of a definite known amount - in this case 10,000 in. lbs. The method of doing this is through the medium of the coupling itself to twist a long shaft angularly through an angle which it has previously determined will produce the torque required. As far as possible we have endeavoured to use the parts already made for testing these couplings, and have merely added thereto as indicated. For the purpose of calibrating the indicator plate a hole is shewn in the flat lever at F. {Mr Friese} to which it is thought some means of applying a load of 1,000 lbs. may be attach- ed {J. L. Edwards} , such as by a weight suspended from a cable down one of the inspection pits, and running over a pulley to the hole F. {Mr Friese} The proportions and sizes of the existing parts referred to above have been taken from a blue print which was brought here by HS. {Lord Ernest Hives - Chair} on his last visit. The travels of the parts have also been taken from this print, but we have provided an adjustment for this on the circular oscillating lever at E. {Mr Elliott - Chief Engineer} the adjustment being made by sliding the fork connecting piece up and down the lever and clamping same where required by the means provided for this. If it is found more convenient to modify the lengths of any of the parts, such as the circular lever, or connecting rods, we are quite willing that this should be done provided the required result is obtained at the lever F. {Mr Friese} , that is a travel of approximately 10° on either side of the centre ZERO line, with some possible variation of this as might be found necessary. LeC. 2059. is attached to BY's copy. AJS. | ||