flap and flap and flap. Mary Lou Retton!

Flap, you fool!

He's disabled the rudder chain.

Rudder 18 degrees toward South!

Flap your wings Now

OK. Flap those wings.

Can you flap your wings?

What paper went into that flap?

What's this flap about a breakin?

Hell, not pull the rudder or head twothirds.

How would you make a single flap?

Wings, flaps, air speed, altitude pedals for the rudder.

The wing has no steering controls, no flaps, no rudder.

I didn't have to try to flap my wings.

We're going to learn how to make one flap.

Well, there are other ways of making a flap.

If I make the flap as skinny as possible,

Quick to assemble. It's got a flap that's the invention.

The rudder cables became useless and I lost my ability to steer.

Hello, my name is Christian Rudder, and I was one of the founders of OkCupid.

It's very complicated, but it turns out they flap their wings very quickly.

So that's the flap, and all the rest of the paper's left over.

And if I make the flap from the middle, it uses a full circle.

If I put the flap on the edge, it uses a half circle of paper.

We went from a back rudder to a front rudder to two rudders to multiple rudders to the whole boat changing shape, and the more we are moving forward, and the more the design looks simple and cute.

I'm curious, you started your beautiful sequence on flight with a plane kind of trying to flap its wings and failing horribly, and there haven't been that many planes built since that flap wings.

I'm curious, you started your beautiful sequence on flight with a plane kind of trying to flap its wings and failing horribly, and there haven't been that many planes built since that flap wings.

That's when you use your feet to control the rudder pedals to control the airplane on the ground.

And you can see there, it needs a quarter circle of paper to make a flap.

So I built this small sailing robot with the rudder at the front, and I was trying to pull something very long and heavy, so that's a four meter long object just to pull, and I was surprised with just a 14 centimeter rudder,

So, no matter how I make a flap, it needs some part of a circular region of paper.

I haven't eaten all day! guard coughing and sniffling You hear that? guard blowing nose guard clearing throat flap

Then I was so happy that I kept playing with the robot, and so you see the robot has a front rudder here.

And he held up the flap of the bar. Mr. Marvel rushed behind the bar as the summons outside was repeated.

Using the rudder and the jib with the wind behind it we backed up, turning the bow to the direction we wanted to go.

And so, I thought, what about if we just take the rudder from the back of the boat to the front, would we have better control?

A normal sailing boat has a centerboard here and a rudder at the back, and these two things are what creates most resistance and turbulence behind the boat, but because this doesn't have either a centerboard or a rudder, we hope that if we keep working on this hull design we can improve and have less resistance.

Can you create a flap for me in the tongue here so I could hide my American passport inside of here should I need it?

You aim straight and make sure he can't use that thing... for nothing but a flap to keep the dust out of his butt crack.

A butterfly can flap its wings in Peking and in Central Park you get rain instead of sunshine. Was I going too fast? I missed it.

Then I started publishing online, and some friends from Korea, they started being interested in this, and we made a boat which has a front rudder and a back rudder, so we started interacting with this, and it was slightly better, although it was very small and a bit off balance, but then we thought, what if we have more than two points of control?

And we tackle this problem by building giant, dynamically scaled model robot insects that would flap in giant pools of mineral oil where we could study the aerodynamic forces.

And from that stick figure, I somehow have to get to a folded shape that has a part for every bit of the subject, a flap for every leg.

Fold it in half, fold it in half, fold it again, until it gets long and narrow, and then we'll say at the end of that, that's a flap.

Well, if I unfold it and go back to the crease pattern, you can see that the upper left corner of that shape is the paper that went into the flap.