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).
Testing of a horizontal pulley and belt drive arrangement.
| Identifier | ExFiles\Box 55\2\ Scan038 | |
| Date | 3rd November 1915 | |
| To Wsr. for Hy {Tom Haldenby - Plant Engineer} from R. {Sir Henry Royce} Copy Also you might test if a longer horizontal drive gave much advantage, that is, could we run with the slack side at the top with either of these pulleys and transmit the 2 1/2 HP with the slack side very slack, sagging. I think it would be possible to arrange the drive in this way if we found it advantageous. So that we now ask you to compare the 3/4" belt with the 5/8" belt, and the previous experience with the 5/8" belt if the small pulley is increased in diameter and also if the drive is rendered horizontal. If we can run with the slack side really slack, we can save the bearings and the belt, and also the adjustments of the belt. I fear, however, that in any case we shall be obliged to put up the size of the pulley, and the reason the belt did not give satisfaction was evidently due to the fact that it had to be very tight in the case of your test. We want an arrangement which will run 100 hours, and at any time during that period will transmit the 2 1/2 HP reliably, but the load would not be on always, although the belt would be always running. F.H.R. | ||