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Author Topic: Doug Stout's Arrow Canard build (split off from the Stunt kite design tool)  (Read 67242 times)
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Revrookie
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Location: Calgary Alberta Canada

« Reply #405 on: July 17, 2015, 01:38 PM »

Not keeping you too busy are we?
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Doug S
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Location: Byram Township, New Jersey

« Reply #406 on: July 17, 2015, 02:54 PM »

Just the right amount.  Cheesy
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"We never really grow up, we only learn how to act in public."
Doug S
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« Reply #407 on: Yesterday at 05:54 PM »

I added to my Google Drive the Plans for the Bird of Prey 48, where the panels are joined together with straight stitching.  The overlap seam was reduced to 3/16 inches.  The plans for the original version with the zigzag stitching are still on my Google Drive.

Haven't posted in a while because I have been busy in my workshop.  I am in the process of building three different Bird of Prey glider kites with different construction techniques, which makes it fun.  They consist of an ultra-light Bird of Prey 36 going to the UK, a Bird of Prey 48 going to Canada and a Bird of Prey 96 for Tom White in California.  Trying to completed them before the second week in August.

Regarding the Bird of Prey 96, I was trying to tension the leading edge, from the nose to the wing spars, by adjusting the location of the wing spar joiner along the center spine and trying different joiners with varying degrees of forward angle.  It turns out that I had the nose bungee too loose.  Tightened the bungee and we are now good to go.  Have test flown this glider kite with the light frame (P90s/Zero Airs) and nose weights range in length from 3.5 inches (20 grams) to 6 inches (34.3 grams).  I can change the nose weight in less then 15 seconds, which makes testing out the glide fun.  As I increase the length of the nose weight by 0.5 inches, the center of gravity moves forward by about 0.25 inches.  The glide sweet spot appears to be with the 4.5 inch nose weight at 25.7 grams, which moves the center of gravity to 21 inches behind the nose with a very low static margin of 0.03 percent.  With this nose weight, the Bird of Prey 96 weighs 150.8 grams, with a sail loading of 0.0725 grams/sq.yd. of projected sail area.  This large glider kite handles this sail loading just fine, and it now has a long flat glide and can cover ground.  When the weather is right again and not so hot, I look forward to flying the Bird of Prey 96 at our local sports field complex again and put it through its paces.

Tom and I have dialed in the Delrin Machined Joiners for the two different sets of frames (P90s/Zero Airs and P100s/2PTs).  Tom White also will receive a selection of nose weights so he can experiment with the glide trim on his Bird of Prey 96.  Why should I be the only one having fun and driving myself crazy with these cool adjustments.

Back to the workshop.

Yours in kiting,

Doug
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"We never really grow up, we only learn how to act in public."
twhite510
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« Reply #408 on: Yesterday at 06:34 PM »

Doug,

 It has been great getting to work with you on your BOP96. I have learned a boat load from you. I really appreciate it.
 I can't wait to get my hands on the 96. It will be a totally new learning experiance getting that beast dialed in. Looking forward to it.

Tom
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