Sky surfer and Para plane
I have no knowledge about parafoil design and manufacturing. I will look into a RC parafoil, because the parafoil itself is no need of folding a wing while carrying the flying object. Restoring forces of rolling and pitching work easily like a swing, I think.
|Sky surfer||Para plane|
Scratching Sky surfer and Para plane
So I have checked sites about parafoils. A site tried a rebuilding a Hirobo paraplane that needs power much for loading a camera. It refers that a stick of the transmitter is unusual. Another site uses a Sky Surfer loading a camera. Hobby Zone describes the specifications of the Sky surfer. Hirobo site shows the specifications. I compared the both in the table. A site sells a parafoil kite ¥6,600. The size is 71cm��97cm. The maker is Premier Kites.
In searching RCG, I found 2 sites which makes parafoils and sell its kits and an excellent pilot. He rebuilt a Sky surfer.
Two site write that it is diffcult to make a parafoil and costs $220. A labo of Kyushu Institute of Technology studies and made a parafoil of 1.5m span. Two students in Japan tried a test of a parafoil made by themselves. A blog shows a photo of the test.
A site shows an example of scratch and how to make. The photo shows one of examples. However, it seems that the parafoil kite blows rather than flies. A labo does a wind tunnel experiment of a parafoil.
Check up parafoil for UAV project
I think that Parafoil has a characteristics of kite. A kite of 10 g/dm² needs winds of 10 m/s. Wing load of Sky surfer and Para plane are 25.7 and 134 g/dm². Their lift force are bigger than simple kite. But either value of Sky surfer or Para plane is not true, I think. I had bought Prairie L before. Its wing load is 40 g/dm². Para glider decends little at 5 to 10 m/s. Its speed is the same of bicycle. I hope my UAV will flies fast far away.
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