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).
Suggestions for improvements to a new standard crab mechanism design.
| Identifier | Morton\M6\ img010 | |
| Date | 24th November 1929 guessed | |
| u. Crab (new standard) I believe the few suggestions I made are valuable. (1) To cantilever the lifting motor end of the crab, (a) equalizes somewhat the load on the axles. good for bearings & deflections, (b) it leaves room for simple treatment of the brake mechanism. (2) To use a single plate to carry pulleys in 8 fall cranes & so save about several inches in all the crab width. (3) To centrally design rings so that they can be reversed when worn & also to take advantage of the side step, so as to get the bearings nearer to the centre of the wheels, saving crab width and deflection. [also rather think if shafts it bearing pressure too high] (4) I do not think it going to any trouble to enclose the cross travel gearing. it would be different if we could enclose all but just these two gears. would not suggest we ought to do all the others. I am particularly anxious that in all your new designs you should not go into production [Vertical text on the left margin]: deflections & the rope pressure on the tapered drums. time to make nearer altogether shorter & we must avoid all other features of rope will never be correct unless the two falls are rope with centre of shafts (partially in any case). | ||