What type of Airfoil is used for hang glider?
369665
The Rogallo airfoil is popular.  See the link.
969223
aero zepplin or something like that
196701
Diamond- and wing-shaped kites, being very light, need the tail for stability in flight; to give weight to the bottom and keep the kite upright in the wind.  Box kites, which are inherently heavier, do not require tails because there is sufficient weight below the string to keep the kite upright.
783713
the most sway in the heaviest winds is 15 cm\n\nit's designed with the wind in mind . . .
790866
http://www.snap.com/search.php#oragami%20project\n\nGood Luck\n\nI would suggest a turtle and use the tortise and the hare story.
1090491
Petercopter ( Helicopter )\n\nHindenpeter ( Zeppelin/Hindenburg )
1114781
The simple answer is to have a mechanism for absorbing the impact of the fall. What to build depends on what materials you are restricted to.\n\nThere are several ways to go about it. Design a super-structure (the outside part) that crumples when hit. Suspending the egg is also a great idea (as was already suggested) If you can't or don't want to use a sock or stocking, using some kind of thick substance like gelatin would work well. Parachutes also work very nicely, I've seen some cool ones that worked like helicopters, spinning to slow down the descent. If you want a better answer I suggest posting whether you are restricted to certain materials.
539870
Try searching flies such as the beadhead prince nymph, pheasant tail nymph, royal wulf or a #14 adams. The royal wulf is effective and it is easy to follow, and the adams pattern works everywhere as does the beadhead prince nymph, #14 or #12.
870325
I suggest you build an anti-gravity lifter device that is able to float in the air without anything supporting it.\n\nhttp://www.amazing1.com/grav.htm
520077
Have you tried the Pressurised Bottle Rocket?\n\nEasily constructed with used plastic bottles. What you need is a pump, cork and a tube. Build some tail fins to stablise the rocket for flight. You need to put in some water in the bottle. Then just pump the pressure up and you have an entertaining setup.\n\nHave a challenge who can shoot the highest and then parachute the Rocket down. The highest and/or the longest hang time wins.\n\nYou will need a field to do this properly though.
267083
I suppose that depends upon how mainstream the application.\n\n“Traditional pulsejet engines are probably not best suited for use in ultra-light airplanes.\nThey consume enormous amounts of fuel (weight), run red-hot, such that any fabric or other flamable material within several feet of the engine body will likely burst into flame, and are very, very loud with lots of fatigue-inducing vibration.”\n\nHowever kits are readily available:\nThey can be provided in regular reed-valve or valveless versions (note: the valveless versions develop about half the amount of thrust but have no reed valves so will run indefinitely without any kind of maintenance). The valveless and conventional heads can be interchaged freely to convert the engine from one mode to another in just a few minutes. \nModel PJ30i will develop about 15 pounds of thrust and the kit costs $230 ($270 with tailpipe).\n\nAnd it looks like pulsejet dragsters are currently being built.
972957
Which paper Airplanes can fly farther
849450
Try this...Take a square piece of paper and fold it into a triangle.  Now fold a series 1/4 folds (3 or 4) on the wide end.. then insert one end into the other (if it doesn't stay then use a small piece of tape to hold together)  What you will have is a cylinder type of craft.. to launch it hold it by the tail (the tip of the triangle) with your middle finger on the inside and all others on the outside... The position should be that the most paper should be facing down\n\nNow just flick you wrist and let go... if you did it correct you will have a futuristic paper air plane that will fly further than most conventional ones..
334844
The best kit plane comes from Vans Aircraft. More than 4,000 have been approved for flight around the world.\n\nhttp://www.vansaircraft.com
373091
just chk out these sites these should help\n\nhttp://www.wildtoys.com/MMMPage/MMMresources/LiftingBody/index.asp\n\nhttp://www.nasaexplores.com/show_k4_teacher_st.php?id=030107172620\n\nhttp://pterosaur.stanford.edu/log02.html\n\nhttp://www.greathobbies.com/rcsailplanes/beginners/rcsailplanes/index.php?PHPSESSID=7aba07b72d725d9326880171abacd11f\n\nhttp://vulpecula.us/simple/archives/2003/10/17/flying.php\n\nhttp://kohlin.com/air/soar-faq.htm\n\nhttp://72.14.203.104/search?q=cache:iOVvoiekkP8J:teacherlink.ed.usu.edu/tlnasa/units/Aeronautics/Part03.pdf+is+balsa+wood+gliders+better+than+styrofoam+gliders&hl=en&ct=clnk&cd=23\n\nmng.1432@gmail.com
671767
http://cgi.ebay.co.uk/New-Bending-Branches-Storm-Dream-Kevlar-Kayak-Paddle_W0QQitemZ7151540482QQcategoryZ87091QQssPageNameZWD2VQQrdZ1QQcmdZViewItem
1026639
the new design helps the way they float better but probably regular air. look up  team GEIST balls.