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).
Design and construction of a 20 HP rear axle stay, referencing drawing LeC.1115.
| Identifier | ExFiles\Box 49\1\ Scan082 | |
| Date | 26th July 1919 | |
| To Da. {Bernard Day - Chassis Design} from E. {Mr Elliott - Chief Engineer} c. to CJ. c. to Bn. {W.O. Bentley / Mr Barrington} c. to EH. c. to EFC. {E. Fowler Clarke - Electrical Engineer} RE 20 H.P. REAR AXLE STAY X.3493. We send herewith drawing No. LeC.1115 shewing the above. The stay is made of 1 1/8" diameter weldless steel tube fitted with a jaw on each end made from bar. The design of this jaw is specially suitable for being made from bar, and we think that to use a stamping for this piece would, on the whole, be unsatisfactory and uneconomical. Taper bolts are used to secure the jaws to the lugs on the torque and axle tubes, and these bolts squeeze the jaws together on to the Lugs in question, so that slack is taken up in every possible way. These bolts have been made 1/2" diameter so as to have ample area to resist the tendency for slack to grow in these joints. The collar on the torque tube is brazed and pinnedin position. * The torque tube has been slightly modified since the last instruction sent you concerning it. It has now been made parallel from the point where the parallel bore starts on the rear end, as far as the brazed on collar which carries the stay lugs. It should them have one taper to the front end. The fitting for carrying the lug on the axle tube has already been shewn on the main axle drawing, but the final design of the lug itself is given on the attached drawing. Recesses are machined inside the lug to allow of the insertion of taper pins. Contd. | ||