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Author Topic: Doug's Bird of Prey  (Read 5727 times)
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thief
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« on: January 27, 2014, 04:34 PM »



Oh boy this thing is sweet! the attention to detail is OUTSTANDING!

The wing tips have battens that are supported by the thinnest microcarbon rod i have ever seen used in a kite......

Have to get some detailed shots and then some video.....

It is amazing to see something that looks like this fly so counter intuitive to convention...and it does so well....

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chiringaloco
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« Reply #1 on: January 28, 2014, 02:49 AM »

Where can i get one? Looks good!
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stapp59
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« Reply #2 on: January 28, 2014, 06:37 AM »

Awesome!  A high tech leaf  Smiley  Flown it yet?  Would be great in the living room today.  -15 outside right now.
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Steve in Indiana
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thief
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« Reply #3 on: January 28, 2014, 07:23 AM »

this is around twice the size of an iFlite...but weighs the same....it does great inside (and a good thing too since it is back to single digits outside again).....
it flies soooo nice.....you do have to switch the orientation of "forward" in your mind...because if you do not your mind might see the kite backwards and that could be detrimental Wink
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Doug S
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« Reply #4 on: January 29, 2014, 09:47 AM »

Thief,

Thank you for your kind words.  It was a pleasure designing this unique kite and building one for you.  As indicated in my other posts, I have a thing for swept forward wings, and their associated aerodynamic benefits.  Very happy that it came together in this kite, which is a real joy to fly.  For those who are interested, the Bird of Prey has a wing span of 24 inches, 130 square inches of projected sail area and weighs 2.7 grams.  I was able to reduce the weight by 0.3 grams from the prototype.

Doug
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ae
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« Reply #5 on: January 29, 2014, 12:57 PM »

It is a beauty, good one Thief and Doug
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Doug S
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« Reply #6 on: February 02, 2014, 07:38 PM »

Finished the 48 inch version of my Bird of Prey and test flew it this afternoon.  It's an incredible glider. Grin  Will post pictures in the near future.

Doug
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Doug S
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« Reply #7 on: February 03, 2014, 01:42 PM »

The following provides a picture of the Bird of Prey with a 48 inch wing span.  Up is the direction of flight.  The kite weighs 32.5 grams and is framed with 0.08 inch carbon tubes for the wing spars and center spine, with 0.03 carbon rods for the tip battens.  The sail material is PC31.

Doug
« Last Edit: February 05, 2014, 10:56 AM by Doug S » Logged

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Doug S
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« Reply #8 on: February 03, 2014, 01:44 PM »

The following provides an angled view of the Bird of Prey 48.  Waiting for the snow to stop up here in the northeast to take pictures while in flight.

Doug
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Stevo
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« Reply #9 on: February 03, 2014, 07:39 PM »

Make it in purple, and I'm sold!  Grin
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Danceswithwinds
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« Reply #10 on: February 04, 2014, 04:46 AM »

I`ll second that.  Looks great want to see it flying soon. Hope it stops snowing for you soon.
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Doug S
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« Reply #11 on: February 15, 2014, 04:53 PM »

... and then there were three...

The attached picture shows the three sizes of my Bird of Prey.  Just finished the 62 inch wing span version, which is on the left.  The 24 inch wing span version is in the middle, while the 48 inch wing span version is on the right.  I hope to get the 62 in the air when the snow stops.  The 24 inch made from Cuben is still my favorite for ultra-light flying.  Thinking of building an ultra-light version of the 48 using Cuben.  They are very efficient gliders.

Later,

Doug
« Last Edit: February 15, 2014, 05:02 PM by Doug S » Logged

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Doug S
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« Reply #12 on: February 15, 2014, 04:57 PM »

A picture of my front yard test flying area, where I dug out the launch area yesterday.  The open area is about 60 feet x 60 feet in size, which is good to test out a glider.  Now there is another 3 inches of snow from today's weather event.  Will dig out the launch area tomorrow.  This white stuff is getting real old!

Later,

Doug
« Last Edit: February 15, 2014, 05:00 PM by Doug S » Logged

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Doug S
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« Reply #13 on: February 16, 2014, 05:34 AM »

Stevo asked about purple.  The attached file illustrates a Bird of Prey with fewer panels using purple and white, with appliques for the dark grey nose and black tail. 

My basement looks like a bird cage store, with 6 Birds of Prey ready for flight (3-24s, 1-48 and 1-62).

Later,

Doug
« Last Edit: February 16, 2014, 06:05 AM by Doug S » Logged

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stapp59
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« Reply #14 on: February 16, 2014, 06:35 AM »

It's been a very interesting project to watch.  Intrigued to see one fly someday...
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Steve in Indiana
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