Will the plane take off?
 

This is a big topic on Honda-tech, just wondering what you guys think about it.

yes, the plane is powered by jet engines pushing on the plane body, not spinning the wheels. The wheels would just be spinning double the rate of normal.

Blah, i voted no.

I'm wrong.

I have a plane, but never tried flyin it off a conveyor belt.

Quick thinking owns me.

This is already a thread like 2 years ago

omg omg omg omg omg.

http://www.macguff.fr/goomi/unspeaka...003-repost.jpg

but since it is SOOO old, and some members probably weren't around for its torture...ENJOY!

^agreed.

This goddamn "riddle" doesn't go away does it? If someone doesn't get the right answer to this they are pretty dumb.

http://www.tristatetuners.com/forum/...ad.php?t=7435&
Found it.

Theoretically, yes, it could take off. It depends on the exact controlled variables.

When someone talks about speed it is always relative to the ground (earth), not the conveyor belt. There's a hint. High school physics teaches you this. The speed you might see on a hypothetical "speedometer" inside the airplane measures the speed of the wheels, not the plane itself.

No, with the conveyor keeping it in spot the plane will not recieve the amount of lift it would need at the speed in which it is capable of taking off at normally, if that makes sense.

Harrier Jet FTW.

holy super old topic

Thrust isn't the same as a car being propelled by traction. A car on a dyno stays still but a jet on a dyno wouldn't matter how fast the rollers move because the jet doesn't rely on the wheels to move it. The thrust would just move it forward. (I'm putting it in car terms :roll: )

The friction of the bearings in the wheels won't be enough to hold a jet back with the thousands of pounds of thrust it puts out. Then again if the jet were to reach takeoff speed the bearings in the wheels would just explode because of all the thousands of watts of energy it needs to displace.

So basically it won't take off because the wheels would just explode before any other variable could happen if the conveyor belt was keeping it still, but if it could move across the conveyor belt (like it should) then it "could" take off.

fair enough, lock it, its a repost. it is a great off topic discussion though.

No.

Just cause.

Yes it will take off as long as the wheels can spin as fast as they need to. Let's assume the jet powers up and starts moving forward at 1mph. The belt will then start moving 1mph in the opposite direction. Since the engines are pushing on the body of the plane and the wheels are simply there to hold up the plane and rotate freely, the wheels would be spinning forward at 2mph.

The problem with the whole riddle is that it isn't specific enough. If the conveyor matches the speed of the plane, then yes it will take off. However, if it is matching the speed of the wheels then the plane would never move and the wheels and conveyor would spin to infinite.

Yes.

The wheels are only a way to decrease friction with the ground, not a means of producing propulsion. The wheels of the jet would simply be spinning at twice the air speed of the jet at take off. Think of it in reverse. If an F-18 was coming into land on an aircraft carrier and there was a conveyor belt spinning at the exact speed, but opposite direction of travel, to the jet would it stop dead if hitting a brick wall? NO, it would simply continue forward at a slightly slower speed, due to some resistance in a bearings, and if not caught by the cable it would go into the ocean.

^ thanks to the lift generated by its wings during its slow descent, of course......

Yes it needs air flow across and under the wings to create low pressure and lift to fly, so NO the plane would not take off!

looks like this may be a good thread after all :)