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Author Topic: My Foray with Single No/Low Wind Soaring Kites  (Read 550 times)
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Doug S
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« on: June 12, 2011, 04:29 PM »

The first picture provides my no/low wind soaring kite, the Urban Ninja, which I build from plans that downloaded from Horvath's website.  Many thanks to Thomas and his website for getting me hooked on this type of kite flying in little or no wind.

The second picture provides my first attempt at my own no/low wind soaring kite, the Osprey, which has an 8-foot wing span and weights 98.7 grams.  The kite is framed with the old Skyshark Zeros tapper wrapped tubes for the wing spars, an old Skyshark straight tapered version of the Zeros for the center spine, both of which I had laying around since the 1990s, and a hollow carbon tube for the spreader.

The third picture provides my second attempt at my own no/low wind soaring kite, the Eagle, which also has an 8-foot wing span and weights 100 grams.  The frame is the same material as the Osprey and the sail has a little less leading edge sweep.  This kite is a little faster than the Osprey and covers a lot of ground.

Doug

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« Reply #1 on: June 12, 2011, 04:41 PM »

Looks good!  What do you mean "leading edge sweep"?
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Doug S
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« Reply #2 on: June 12, 2011, 04:55 PM »

Thank you for the question.  Leading edge sweep is the angle of the leading edge from a horizontal line at the nose.  With no leading edge sweep, the angle would be zero.  Also please note that on a lot of kites, the leading edge is curved, so we use the average as a point of reference.

The Osprey has an average leading edge sweep of 42 degrees.  The Eagle has an average leading edge sweep of 40 degrees, which helped me move the center of gravity foward a little bit.  As a point of reference, the HQ Hybrid 240 has an average leading edge sweep of about 45 degrees.  I use to design and build stunt kites in the 1990s and I developed a program to assist me.  I dusted off the old program to help me design my no/low wind soaring kites.

The Eagle covers a lot of ground and is a blast to fly.  The Osprey is still the best floater, which may have something to do with having no seams in the open area of the sail material, between the center spine and the wing spars, which allows the airflow over the sail to remain attached at lower flying speeds before a stall occurs.

I am still learning how to fly these type of kites but I am having a great time.
 
Doug
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Doug S
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« Reply #3 on: June 12, 2011, 04:59 PM »

My wife is a breast cancer survivor for over 4 years.  As a surprise for her and the Relay For Life event that we just attended, I made a version of my Eagle kite with the pink ribbon and purple tips.  My wife's favorite color is purple.  This kite was test flow and then on display at the Relay For Life event held at Mt. Olive High School in New Jersey on June 11, 2011.  Since it rained again for the third year in a row, the event was held indoors with over 500 participants.

The second picture shows the Laima I recently purchased.  Added some nose weight and seeing if I can get it to glide better.

I also recently purchased a HQ Hybrid 240.  To help it soar better, I added a 5-inch piece of AFC 2400 covered by a 5-inch piece of a Skyshark P200.  The third picture shows how the tubes slide over the center spine at the nose of the Hybrid 240 and are held in place by the bungee.  This nose weight move the center of gravity to 21 5/8" below the tip of the sail at the nose.  What I like about the Hybrid 240 is that it has a steep climb on the launch, even with the bridle connection point moved forward.   Most likely due to the small diameter hollow tube center spine that curves on launch.


Doug


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