At least a power metre square.
There is a 3rd one for my freind Dennis which is completed except for the power blades and the tower.
The smaller turbines may be as small as a 50 Watt auxiliary power.
Ward (my longtime freind and neighbor) wanted power to build a wind turbine, so I enlisted his help and we built the first 'Volvo Brake disk alternator'.Some of the solutions require a PC to be on at all times to log data, so you would power want to have a very low power use.This machine has been pretty trouble free over the last 3 1/2 years except for a bad spell there at the beginning.The rotational homebrew indicator is basically clockwork: a series of gears, driven by a small electric motor, turns the pointer and a potentiometer gives positional feedback to the electronics, a simple Wheatstone bridge circuit.A hot laminator homebrew may work instead but the rollers may be damaged wind due to the thickness of the board. Car paint or Hammerite work well for.
This starts charging our batteries at 65 rpm and setup seems quite happy to npav produce 3KW.SO239 sockets - one per switch position plus one more for the file input (unless you prefer to use a coax tail with a PL259 connector - thats not arch a bad idea as it reduces one connector pair and cuts about.1dB of loss).Even better, I can often build better quality, longer lasting items than I can buy, for the simple stuff anyway.The photo of a 2m masthead preamp takes me right back to that VHF Field Day when we lost a good hour right at the start of the contest thanks to a wayward blob of solder being pointed at by Chris or Ian.Its a fiddly process to get the scales positioned and sized just right but sometimes thats what metal it takes.Back to quick links A resolution one day project - a GS35b HF amplifier Ive been collecting bits to build an HF amp to replace hardware the LK550 - one day.Here is one way to.The experts recommend measuring wind speed at your site for a year before investing in a wind turbine. .One time the blade blew up when the tail fell off and it yawed very quicky.We could probably get more in higher winds if we make the tail a bit heavier, it furls early.In the fall/winter of 2003/2004 I had 3 other neighbors come up and build 10' diameter machines. It's 20' diameter and sits on a 75' tilt up tower made from 10" diameter tubing.
The steel laminates are nice silicon steel that I got from Ed at m, and they are simply 'stuck' to the back of the stator via the attraction of the magnets alone.
Even non-linear scales for SWR meters are possible.
Overall it's been pretty reliable although I have had some problems and it's been repaired a couple homebrew wind power pdf of times.
I have subsequently scored the concrete using an angle grinder for a permanent indication.