Quote from: fb39ca4 on June 26, 2011, 08:47:09 pm

No, the bottom of the ramp is flat, so the air there stays still for the most part, with the bottom of the ramp just moving over it, while the air has to move up and over on top of the ramp. Though I still don't get how stunt planes can fly upside down, wouldn't a reverse-Bernoulli effect occur, pushing the plane down?

I've never understood this either. COuld someone please explain how planes fly if they can also fly upside down so the wing idea doesn't work

The shape of the wing cross section is such that lift is created by the angle of the on coming air on the wing.  So roll over and establish the same angle and you get the same upward lift because aerobatic airplanes have some what of a symmetrical airfoil shape.

Ouch , some people really love to take risks...

Quote from: fb39ca4 on June 26, 2011, 08:47:09 pm

No, the bottom of the ramp is flat, so the air there stays still for the most part, with the bottom of the ramp just moving over it, while the air has to move up and over on top of the ramp. Though I still don't get how stunt planes can fly upside down, wouldn't a reverse-Bernoulli effect occur, pushing the plane down?

Reminds me of an xkcd comic. I'll try to find it...

the one about the teacher. good, Bad and Worse

I hope something happened to that guy's nuts so he gets a Darwin Award

A what?

Probably

Wow. That is just sad.

Quote from: ruler501 on June 26, 2011, 06:41:11 pm

Poor Bike. The person deserved what he got for stupidity

++

Quote from: Silver Shadow on June 26, 2011, 11:41:32 pm

Quote from: fb39ca4 on June 26, 2011, 08:47:09 pm

No, the bottom of the ramp is flat, so the air there stays still for the most part, with the bottom of the ramp just moving over it, while the air has to move up and over on top of the ramp. Though I still don't get how stunt planes can fly upside down, wouldn't a reverse-Bernoulli effect occur, pushing the plane down?

Reminds me of an xkcd comic. I'll try to find it...

[tangent]I wonder what would happen if that ramp'd truck started driving the wrong way on the highway

It was the same comic I was thinking of
the tangent would be pure evil

It'd be kind of hard to do that "trick" on a bulldozer though, as the very bottom of the scoop is usually not parallel to the ground like the ramp is, resulting in an angle between the road and the scoop and not a smooth transition like the one on the van.

Also, for anyone who is interested, I looked stuff up and figured out how planes can fly upside down. They are tilted pointing up (while upside down, from and observer's perspective) that the leading edge is higher than the trailing edge, which generates lift, though inefficiently compared to an airfoil.

That is an unbelievably stupid idea. That must have hurt.