Originally posted by: giantpinkbunnyhead
Originally posted by: 911paramedic
Originally posted by: giantpinkbunnyhead
Holy crap... It just hit me... the plane will take off! Boy do I feel like a moron! Haha, I"m going to run this by the other pilots at work and see who I can fool with it.
I should have realized it sooner... I mean, flying in Alaska puts me in situations where we do takeoffs on very icy runways. Situations where a car would spin its tires yet we apply takeoff power and we accelerate at the same exact rate as we would on dry asphalt. G'awd! I've been owned by physics again. Heh, that was a fun discussion!
You said it yourself..."you accelerate"...according to this you dont. Your scenario calls for the outside world to be moving in relation to your plane, hence air over the airfoils. This question leaves the plane motionless with no air movement but plenty of wheel spin.
The outside world WILL move in relation to the plane, regardless of if it's on conveyor belts, ice, or asphalt. This is because all the conveyor belt can possibly to is spin the wheels of the plane at XXX speed. This represents very little backwards force and the thrust of the plane would easily overcome it.
Initially the plane is at rest; as is the belt. Now the plane applies thrust and moves forward. (relative to everything around it; not the belt). THe belt instantaneously moves backwards at the same speed the plane moves forward.But what happens now? The belt can only act on the wheels of the plane, and it does... spins them faster. But this does very little, if anything at all, to arrest the forward force generated by the engines.