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Author Topic: Doug Stout's Arrow Canard build (split off from the Stunt kite design tool)  (Read 103362 times)
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Doug S
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« Reply #495 on: March 19, 2016, 06:24 PM »

Making some more progress on the Bird of Prey 76.  The first picture shows the 3/16 in. hem around the perimeter of the sail has been sewn.  Since this picture was taken, I have added the wing spar sleeves, batten pockets and wing tip pocket/reinforcements.  The second picture is a view of the back of the left wing, showing how I was able to cover the white Dacron with the red PC-31.  For this Bird of Prey, I think it looks better than me using my standard black Dacron wing tip pocket/reinforcements and batten pockets.  This was done as a test, so I can figure out how to finish the nose reinforcement, to try and honor the color of the eagle nose.  Just need to add the nose and tail reinforcements, the bridle line and center spine/wing spar joiner reinforcements, then finish the eagle eye/face details.   Almost done.   Grin

Yours in kiting,

Doug

Doug Stout's Bird of Prey 76 (Patriotic Eagle) - Hem Sewn


Doug Stout's Bird of Prey 76 (Patriotic Eagle) -
Rear view of Left Wing Tip - Batten Pockets and Wing Tip Pocket/Reinforcement

« Last Edit: March 19, 2016, 06:35 PM by Doug S » Logged

"We never really grow up, we only learn how to act in public."
Doug S
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« Reply #496 on: March 21, 2016, 03:34 PM »

Finished sewing the Bird of Prey 76 and added the eye details.  I used a wider section of white Dacron that is covered by two layers of yellow PC-31 for the nose reinforcement, so I could hide the center spine end cap behind the nose.  Used a piece of tubing that is sewn to the nose reinforcement as the nose guide for the center spine.  Most of my Bird of Prey glider kites have the center spine extend beyond the nose with an end cap.  I think this will look cleaner for this version of the Bird of Prey.  I also included a picture of the back of the sail, so you can see what I did with the bridle line reinforcements.  Usually I use circle shaped reinforcements.  On this Bird of Prey, I made the shape of the reinforcement like the feather it's behind, so you can not see them when the sun is behind the sail.

As an update, I replaced the yellow accent on the yellow nose panel between the nose and the grey around the eyes, with grey accent on the yellow nose panel.  Now you can see the accent.  Also, my Bird of Prey 76 needs to breath, so I added the nostrils.  Will start making the frame.  Will add the joiner Dacron reinforcement to the back of the sail, after I have the kite assembled and the joiner location dialed in along the center spine.

This version of my Bird of Prey has been very tedious to build, but will look nice in the air.  I could not have build this Bird of Prey without the great aluminum templates from Tom White.  Especially the fine details like the stars, feathers and all of the nose details.  This Bird of Prey was like a jigsaw puzzle to put together.  Grin   

All most done.  Wink

Yours in kiting,

Doug

Doug Stout's Bird of Prey 76 (Patriotic Eagle) -
All Sewn with Head Details, View from the Front of the Sail



Doug Stout's Bird of Prey 76 (Patriotic Eagle) -
All Sewn with Head Details, View from the Back of the Sail



Doug Stout's Bird of Prey 76 (Patriotic Eagle) -
Head (Nose), View from the Front of the Sail



Doug Stout's Bird of Prey 76 (Patriotic Eagle) -
Head (Nose), View from the Back of the Sail


« Last Edit: March 22, 2016, 11:07 AM by Doug S » Logged

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Doug S
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« Reply #497 on: March 25, 2016, 04:04 PM »

Finished the Bird of Prey 76 today.  The first picture is it hanging in my foyer, my traditional picture backdrop.  The second picture is the back of the sail, where you can see the nose and nose weight.  I really like the way this came out, where the nose cap is hidden behind the nose.  To dial in the balance for the first flight, I added two 2 in. long zinc roll pins, which weight in total 14.6 grams.  This moved the balance point forward to 17 1/4 in. behind the nose.  With the nose weight, the total weight is 83.2 grams (0.324 oz./sq.ft. project sail area), which is lighter than I expected.  The project sail area is 1,303 sq.in.  It has the same sail loading as my Bird of Prey 62, with a projected sail area of 867 sq.in.  I used a piece of tubing for the joiner, until the nice machined Delrin one arrives from Tom White.   Grin

Took it for a quick test flight in my front yard.  Wind was a little gusty, between 5 and 8 mph, but this Bird of Prey handled it very well.  First flight, I caught a thermal and it went up to over 100 feet.  She glides very nice and handles beautifully.  This one is a keeper!  Will try to take some pictures of it in flight.  Grin

March 28, 2016 Update:  Received Tom White's joiner today in the mail.  Much better than my tubing version.  With the new joiner and joiner reinforcement installed to protect the sail, the total weight is now 87.7 grams, (0.342 oz./sq.ft. projected sail area).  This works for me and is exactly what I just calculated as a check, when using the sail loadings of the Bird of Prey 62 and 96, and the sail areas of the Bird of Prey 62, 76 and 96.  Waiting for the high winds to calm down to go play.  Grin

Yours in kiting,

Doug

Doug Stout's Bird of Prey 76 (Patriotic Eagle) - All Finished


Doug Stout's Bird of Prey 76 (Patriotic Eagle) - View from the Back of the Sail, Nose and Nose Weight
« Last Edit: March 28, 2016, 02:46 PM by Doug S » Logged

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stapp59
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« Reply #498 on: March 25, 2016, 04:18 PM »

That build certainly has nice detailing Doug  Cool  I feel so lame for not appliqueing in at least a star or two.  Cheesy  Pretty bird.
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Doug S
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« Reply #499 on: March 25, 2016, 04:30 PM »

Steve,

Thank you for kind words.   You can always add stars later.  This is my first one with stars and I was stressing how to do this and not screw it up.  Tom White made me aluminum templates, where I hot cut out the 13 stars from the blue panel, and templates to hot cut out each size of the white stars.  Just used a glue stick to mount them on the back of the sail, then straight stitched from the back side.  Sounds so simple now.  Wink

Yours in kiting,

Doug
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coogee
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« Reply #500 on: March 25, 2016, 04:48 PM »

Very nice work!

Mike
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Doug S
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« Reply #501 on: April 01, 2016, 09:46 AM »

Mother Nature is not being very cooperative since I finished this glider kite.  Been able to get out twice and fly.  Today the winds were better and ranging from 5 to 10 mph, with gusts above 20 mph.  This Bird of Prey is a pisser to fly under these conditions!  It cuts through the turbulence and is responsive.  The sail is very efficient using the stiff CST DPP 0.157 in. OD Carbon Tubes and Tom White's great machined Delrin Joiner.  During the lower end of the wind range, I believe I have the balance point dialed in, reducing the nose weight to 3.0 in. in length.  I tried 3.5 in. nose weight the other day, and it appeared to still be a little nose heavy.  Originally I used 4.0 in. of nose weight and it was nose heavy.  Based on this, the total weight of this glider kite is now down to 84.2 grams (0.328 oz./sq.ft. projected sail area).  The following provides a picture of the front and back of this glider kite, where you can see the current nose weight and joiner on the back side.

Need to wait for the wind to die down next week to confirm the balance point and nose weight to be used under calm conditions.

Yours in kiting,

Doug

Doug Stout's Bird of Prey 76 (Patriotic Eagle) - Front View


Doug Stout's Bird of Prey 76 (Patriotic Eagle) - Rear View
« Last Edit: April 01, 2016, 09:49 AM by Doug S » Logged

"We never really grow up, we only learn how to act in public."
Doug S
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« Reply #502 on: April 14, 2016, 09:16 AM »

The following picture shows newly finished Bird of Prey 24s and Hawk 20s that will be used during the hands-on portion of my presentation at the Kite Mania North "Windless" Edition 2016 Event in Dedham, MA, this weekend on April 16 and 17, 2016.  They each weigh 2.7 grams and have almost the same projected sail area and sail loading.  These glider kites will allow the participants to experience the difference in performance and handling due to the shape of the sails, and to experiment with moving the balance point on the Bird of Prey 24s, the flying line/bridle connection point on the Bird of Prey 24s and Hawk 20s, and sail washout angle on the Hawk 20s.  If you live in the northeast, I hope you can make the event.  Grin

Yours in kiting,

Doug

« Last Edit: April 14, 2016, 09:19 AM by Doug S » Logged

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Doug S
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« Reply #503 on: April 19, 2016, 08:18 AM »

I had a great time at the KiteMania North "Windless Edition" 2016 Event in Dedham, MA this past weekend on April 16 and 17, 2016.  We all greatly appreciate the hard work that Archie Stewart, Steve Santos, and Sue Moskowitz put in to plan, host and run this great indoor event.  Also we greatly appreciate the efforts of all of the presenters and helping hands from the Northeast and Canada.  I hope event pictures will be posted at their Facebook Page in the near future, at https://www.facebook.com/kitemaniawindlessedition/?fref=nf.

The following provides a few pictures from this event.  Thank you to those individuals who took the pictures and shared them.

Yours in kiting,

Doug

Normand Girard from Montreal, Canada and I chatting,
while I assemble a Bird of Prey 36M for my presentation.



My presentation underway on Kite Aerodynamics and Tuning Techniques.
On the left are 4 Bird of Prey 36s and 2 Bird of Prey 48s ready for flight.



3 Bird of Prey Glider Kites in Flight after my Presentation.


Open Space flying in the Presentation Hall.


Open Space flying in the Presentation Hall.


Bird of Prey 76 Patriotic Eagle in Flight.  Just had to give it a try indoors.
Was able to fly it up to the high ceiling with ease, and around the perimeter of this great room.



Scott Weider with his Rev, with me with my Bird of Prey 36M in the background.


« Last Edit: April 19, 2016, 10:54 AM by Doug S » Logged

"We never really grow up, we only learn how to act in public."
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