[RE-wrenches]

[Tom Simko]

on 12/2/02 6:01 PM, Nick Houser at offgrid at prcn.org wrote:

 My Whisper H-80 is fine in low and medium winds, but once it starts
governing, AND then yaws, it makes a noise that'll wake the dead! It's
unacceptable, even with my closet neighbor a 1/4 mile away... I plan on
replacing it with a AWP 3.6.

 A tether raises the  problem of it getting fouled in the rotor, obviously.

Tom Simko
Skyline Solar

> Hello Wrenches------back on the topic of screaming Air machines: a customer
> of mine with an Air 403 Marine mounted low atop a cliff in turbulent air
> above a beach wide open to the Southeast gales we get here (hurricane force
> gusts not uncommon) has always reported excellent output (would you believe
> 30 to 50 Amps?) but putout neighbors.  Recently he reports some noise
> abatement success with little loss of output by tethering it about 45
> degrees offline (azimuth)  In other words, if the gusts are from the
> Southeast, he ties it facing about South.  Any comment on this practice,
> pros or cons? Chime in , Mr. Piggott, if  you please.  By the way, he also
> claims to have calculated that the tip speed of his machine is approaching
> the speed of sound, hence the yodeling in storms.  I haven't checked his
> math yet.  Is he nuts?--you aeronautical types have fun!  Nick Houser, Off
> Grid Power, Powell River, British Columbia.
> 
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