[WISPA] (topic change) sort of tower failure...

2009-05-27 Thread reader
Ok, so, two weeks ago, after having stood for 4.5 years, through 2, and I mean TWO century wind storms, my generator tower failed on a very normal normal windy spring day. We took it the rest of the way down, cut it apart, looking for the cause of failure. And found none. No rust, no

Re: [WISPA] (topic change) sort of tower failure...

2009-05-27 Thread Patrick Shoemaker
Was the generator shaft seized? Variable pitch blades locked at the shallowest position? Patrick Shoemaker Vector Data Systems LLC shoemak...@vectordatasystems.com office: (301) 358-1690 x36 http://www.vectordatasystems.com rea...@muddyfrogwater.us wrote: Ok, so, two weeks ago, after having

Re: [WISPA] (topic change) sort of tower failure...

2009-05-27 Thread reader
] (topic change) sort of tower failure... Was the generator shaft seized? Variable pitch blades locked at the shallowest position? Patrick Shoemaker Vector Data Systems LLC shoemak...@vectordatasystems.com office: (301) 358-1690 x36 http://www.vectordatasystems.com rea

Re: [WISPA] (topic change) sort of tower failure...

2009-05-27 Thread Patrick Shoemaker
To: WISPA General List wireless@wispa.org Sent: Wednesday, May 27, 2009 1:51 PM Subject: Re: [WISPA] (topic change) sort of tower failure... Was the generator shaft seized? Variable pitch blades locked at the shallowest position? Patrick Shoemaker Vector Data Systems LLC shoemak

Re: [WISPA] (topic change) sort of tower failure...

2009-05-27 Thread reader
General List wireless@wispa.org Sent: Wednesday, May 27, 2009 2:55 PM Subject: Re: [WISPA] (topic change) sort of tower failure... Ah. Was the generator shaft spinning freely during the last two windstorms? A stalled (or nearly stalled ~ 15 RPM) rotor will present a much higher wind load