Re: Q2 LS1 Carbon spar?
Mike,toggle quoted messageShow quoted text
It would have been very dumb of me to print detail plans for alternate spars in QTALK (I didn't just fall off a turnip truck, hee hee). That would be hand holding in my estimation AND liability dangerous given the critical nature of the part and the lack of successful flight testing. In the spirit of "education and recreation" and sweat equity I pointed out possible directions to go. For example many Dragonflys are operating successfully with builder built spars. As noted in another post, Doyle and Weishaar built one with their own brainpower which was proved successful. I was told QAC's first one used all carbon layups a la the GU... and there were a couple other trials underway about which more I have not heard.. We have some sharp cookies in the QBA and I believe if I or any of them had your canard and if the spar was not mutilated we could extract it and use it in a new build. If you had built a Q in the first place you would have enough composite knowledge and skill to figure out how to do it. Sweat equity... not avoidable with a skinny bankroll.
You are wise to be suspicious of the rest of the build job given the problem with the canard. Your $$$ AND Life depend on it. You might coax a successful builder to examine your carcass to give you some peace of mind... or not.
From: Mike Perry dmperry1012@... [Q-LIST]
Sent: Thu, Sep 4, 2014 2:20 pm
Subject: Re: [Q-LIST] Q2 LS1 Carbon spar?
I should have been more specific: It is hard to WIN a suit involving experimental aircraft, but it isn't hard to file one. Sometimes defending yourself costs so much you go out of business anyway -- that's what happened to QAC if I remember correctly (they won the appeal but went into bankruptcy anyway). And you are correct -- those are risks that keep people from publishing the info I'm looking for.
The (former) editor of Q-Talk probably knows better than me, but I don't remember 3 spar plans in the back issues. In fact I don't remember any suitable for a Q-2 or Q-200 (variants for the Tri-Q certainly were, and Alan Thayer's spar-less Q-1 canard).
My own project is stalled by a canard problem -- the original builder did not assemble the canard (LS-1) per plans. Thus my interest in a replacement spar. The spar sweep is completely wrong, wheels 6 inches aft of proper location. That's probably reparable, but if he didn't do that right, should I trust any of the rest of his work? Hard Question. I can buy a replacement spar from Fast Little Airplanes, ~ $3700 (and worth every penny) but it's hard when I'm not sure about the rest of the project. I guess the "sweat equity" approach would be hard also.
If you could point me at a spar design I could build and use in a Q-200 I would appreciate it.
On 9/3/2014 10:28 PM, JMasal@... [Q-LIST] wrote: