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Machining Characteristics of Plastics
What kind of speeds are producing this effect? My KISS doesn't
produce any significant vibration up to 30 kts or so. That is as fast as I have run it. Have you checked the balance of the blades? A slight unbalance in the blades might induce a vibration in the mounting. I chose to use 2" SS tube rather than sched 40 pipe. The PVC fitting is a snug fit. The KISS came with an assortment of fittings to fit a number of different kinds of pipe. If the 2" tube fits the KISS better than the sched 40 pipe, perhaps attaching a short length of 2" tube to the top of the pipe for mounting would be a simpler solution. Doug s/v Callista "Geoffrey W. Schultz" wrote in message . 16... I have a KISS wind generator that develops vibration at certain wind speeds. The problem is that there's a PVC fitting that goes over a 2" stainless schedule 40 support pipe that is loose fitting. I want to machine one with a sleeve bearing on a lathe and make it out of plastic. However, I really don't have any experience machining plastic, I've been looking at www.mscdirect.com under Raw Materials/Plastic Material/Rods for 3" material. To keep costs under control I'm looking at the following: Nylon Acetal UHMW LDPE HDPE Comments on the machining qualities, UV resistance, and overall strength of these would be greatly appreciated. -- Geoff |
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