| The Craftmans Shop > New from Old |
| Trying to Quieten the 110KVA Generator |
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| russ57:
Offer the guests a custom cast souvenir... Maybe cast iron earmuffs... -russ |
| awemawson:
Today I extended the radiator surround forwards towards the west wall by about eight inches. This will allow me to use a single width of the canvas as a wrap and give sufficient overlap for fixing, otherwise I'd have had to join two strips of canvas which would have been a bind. Need to make and fix a grill to keep insects out, then the canvas can go on. |
| hermetic:
Neat work on the radiator extension Andrew, but we wouldn't expect anything less from you! How about some industrial rubber conveyor belt between the woods that the genny is standing on and the floor, might stop the floor becoming so much of a transfer medium for the sound. |
| awemawson:
With the help of a friend I managed to get the canvas wrapped round the wall flange and radiator extension, and fixed with 25 mm strips of Zintec pop riveted through the canvas. Prior to wrapping I put gaffer tape over the raw edges of the wall cowl and radiator extension to hopefully prevent the canvas chaffing. Needless to say it was not ever so easy, but rare earth magnets came to the rescue holding the canvas while I fixed the strips on. I'd intended to use double sided carpet tape to hold it temporarily in place, but as the canvas is waxed it didn't stick! Once it was in place and the seam crimped together with clothes pegs I was able to tack stitch the seam with rather crude tacks and the pegs could be removed. Starting the generator it was immediately apparent that the airflow was now completely different. Before the radiator air was re-circulating but now the hot air is expelled and fresh drawn in through the PVC door strips, which now billow inwards. I feared that the door being partly open would increase the external noise but I'm still measuring 60 dBa at the cottage courtyard. It's amusing to see how the 'tunnel' inflates as the generator is running. . . . just the outer grill to make and fit, but it's pouring down so it will have to wait. |
| awemawson:
Rain barely stopped all afternoon, but as I have the original cowl, where I cocked up the flange, I was able to use it to model the vermin mesh. Mesh cut and bent and ready to fit when weather permits! It is slightly finer than I would have chosen as no doubt it will give a bit of air resistance, but I had it in stock so have used it. Can always re-make it later in a coarser mesh if it gives problems, but I think that the engine is adequately cooled and anyway will only be used for short(ish) runs. |
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