Thanks Daryl.

Yes, my understanding is that when the air is redirected downward from the wing, a force must have acted on it; and for that action the opposite reaction (Newton's Third Law) is lift of the wing. And I think "ground effect" is when the vortices that you referred to are interrupted by the ground--very low flying. When flying higher off the board, we create rising air akin to "ridge lift" that gliders, hang gliders and soaring birds gain altitude in. Ridge lift is like flying in thermals in that both are rising air. But ridge lift differs from thermal lift in that the later is caused by hot air rising and the former is caused by wind striking hills/mountains and being diverted upward to some extent.

John Collins, Phil Rossoni and others have made fixed-wing walkalong gliders from paper. But no matter how brilliant their designs, the fact remains that paper--even very thin paper--is many times heavier than thin foam for a given surface area. So they glide much faster and I find them to be difficult to adjust. Thin EPS foam, on the hand, can be only a few times more dense than air itself. You can see more about foam gliders here. goo.gl/Y25oyJ It is possible to slice your own foam if you cannot buy it. There are also spinning paper gliders that are known as "tumblewings" or "tumbling wings". They fly slower, although they can be tricky to launch.

@@sciencetoymaker thank you so much sir, for the detailed explanation. Is it possible to make any kind of walk along glider using butter paper or origami instead?

What material is your glider made up of? Is it paper?

You can learn more here sciencetoymaker.org/walkalong-glider-airsurf-air-surfing/ Also, there are people in Thailand already making and flying walkalong gliders. Perhaps you can connect with them. kzfaq.info/get/bejne/rax1ZMSYqrixqHk.htmlsi=_Sj7NU_081kIUA8A

The board deflects the air up, so it lifts the glider.

When you call it "follow foil" am I correct in assuming that you are making a John Collins (The Paper Airplane Guy) design? It is possible to make walkalong gliders out of paper, but it's many times heavier than 1/2mm thick EPS foam, which is what you see people flying in this video. Making it out of aluminum foil is an interesting idea, but do that experimenting AFTER you get a paper one flying. And it's difficult to find good paper now. Phone book paper was excellent--about half the weight for a given surface area than printer paper. See if you can find an elderly person with an old phone book stored away somewhere. Most news paper seems to be somewhat lighter than printer paper. Here's what I suggest: start with one of the spinning walkalong glider designs. John Collins invented the "tumbling wing", also called the "tumblewing". I have a design called the "big mouth tumblewing" and another called "dihedral magnus effect glider". I also sell the ready to fly foam gliders at my website

I made a tumblewing walkalong glider and it slowly fly. It's made out of paper

Look at his channel

Thickness depends on several factors. I have used sheets anywhere from 0.5mm to 1mm. Experiment.

I make and sell the EPS foam sheets, but it is expensive to mail outside the U.S. You can cut your own foam sciencetoymaker.org/walkalong-glider-airsurf-air-surfing/make-your-own-gliders/hotwire-cut/

Thank you !

sciencetoymaker.org/walkalong-glider-airsurf-air-surfing/

Me too. I just made a gideo of me flying a mosquito glider

At first, when i started flying gliders, i just couldn't believe that there is some wave of air deflected of the board keeping the glider levitated

It isn't paper, it is just thin half millimeter EPS foam cut with a hot wire cutter. Paper is too heavy to fly on a wave of air. It will not catch it

Bell pepper

Jk

Can you tell me more? What did you make the glider from? These gliders are made from EPS foam that is less than 1mm thick.

I can not make this kind of glider out of paper. Paper is much heavier and not strong enough. There is a spinning kind of glider that can be made from paper: various designs of tumblewing. This is one kind kzfaq.info/get/bejne/l9JpeLWllrbNdo0.html They are more difficult to launch and fly, but paper is everywhere.

kzfaq.info/get/bejne/n86HmJOj1dWZqmw.html here is one

First, heavier gliders tend to fly faster. Then, where they are relative to the board can also make them go fast. If the glider is closer to the front edge of the board, then more updraft tends to hit the back of the glider, so it tilts down a little, going faster. It takes a lot of practice.

@@sciencetoymaker nice thank you

Yes, but the gliders are made from .7mm EPS foam, not paper. sciencetoymaker.org/walkalong-glider-airsurf-air-surfing/

Unfortunately, it is very expensive ($17USD) to send even small packages outside the U.S.

I can make seagull walklong glider

@@mehakfatimahakro-os6ni Good!

Tell me more about it. What material did you use to make the glider? Can you send a picture?

That kind of glider must be made from then expanded polystyrene foam. If you want to make a paper glider, try this spinning kind kzfaq.info/get/bejne/f5eZkq9-qNy0iGQ.html

@@sciencetoymaker hi! I am your subscriber, and remember the foam that you sent like 3 weeks ago? That was to my dad! I just made a video of my flying a mosquito and it works fine! It turns sharply, and i still have lots of foam left! I also made an airsurfing kit! So thanks a lot! Sciencetoymaker! And i absoulutely like all your videos!

@@ktg1012 Hi KTG 10, I just watched your video. Excellent! Greetings from Pennsylvania

@@sciencetoymaker yes i saw your comment!! Thank you!

@@sciencetoymaker and what kind of rubber was that on your dragonfly helicopter? Isn't it tan suoer sport? Or was it a different kind?