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Yah, a funny comeback that I'd have probably gotten banned for.
I would have said/did the same thing no matter who made the statement. Let's keep this all light hearted and on topic before we end up having to lock the thread and hand out vacations. Both sides are putting up good points so let's all stay on topic and leave the B.S. to a min.
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didn't read through all of the posts, but wouldn't it technically depend on whether it was a prop plane or not? If it was a jet, then no air is moving over the wings, if it is a prop plan, then the prop is pushing air over the wings.
Shouldn't matter whether or not it's a prop plane of a turbine. Each is a variation on a similar theme. Neither flows enough air over the wings by itself to get the plane to take off. They are simply a means of "pushing off of the air" and creating enough forward movement so that enough air is passing past the wings (from the movement of the plane) for the Bernoulli to be right.
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didn't read through all of the posts, but wouldn't it technically depend on whether it was a prop plane or not? If it was a jet, then no air is moving over the wings, if it is a prop plan, then the prop is pushing air over the wings.
That's an interesting look at it.
Does anyone think that if the prop were actually spinning fast enough it would be able to create enough force to actually provide lift??
Or is the prop simply not large enough to create enough wind to do that?
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Apology accepted...and I guess I have to agree that you are right...but I think that the point of the question is still that it is impossible for the plane to achieve any forward momentum at all.
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Quote:
Originally Posted by Gimpdiggity
I get out of the question that there is NO WAY that the plane can achieve ANY forward momentum.
right... if a plane isn't moving, it's not gonna take-off........ UNLESS you've got a strong enough headwind I've actually seen a plane come completely off the ground just sitting on the ramp during a big storm.... luckilly you tie them down after every flight so they don't go anywhere.
but in the conveyor belt scenario that started this whole thing, it can still acheive forward momentum.
I was waiting to see who would ask that! I was thinking the same thing
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right... if a plane isn't moving, it's not gonna take-off........ UNLESS you've got a strong enough headwind I've actually seen a plane come completely off the ground just sitting on the ramp during a big storm.... luckilly you tie them down after every flight so they don't go anywhere.
but in the conveyor belt scenario that started this whole thing, it can still acheive forward momentum.
Yah, at the airport I work at I've seen some planes come in for a landing...hit a bit hard, and bounce right back up in the air so high that they needed to punch the throttle and come around and do the whole thing again.
I've also seen one literally almost fall out of the sky the last 10 feet or so when a rather unexpected tail wind hit it pretty hard.
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Quote:
Originally Posted by Gimpdiggity
That's an interesting look at it.
Does anyone think that if the prop were actually spinning fast enough it would be able to create enough force to actually provide lift??
Or is the prop simply not large enough to create enough wind to do that?
no, a prop isn't big enough to do that. During a pre-flight check you sit on the ramp, burry your feet on the brakes & push the throttle to the fire-wall... the plane will shake around but doesn't go anywhere.
In the conveyor belt scenario, it doesn't matter if it's a prop or a jet... the engine is still using the air to pull itself forward, not the ground... doesn't matter what kinda plane it is, it WILL move forward, generate lift & take-off regardless of how fast the conveyor belt is moving in the opposite direction. It's just like my desk chair & rope theory... you're the engine, the rope is like the surrounding air.
a helicopter has a big enough prop to lift it vertically and enough power. I think that if a plane was built to allow a big enough prop, there is no way that you could keep it from taking off.
In the conveyor belt scenario, it doesn't matter if it's a prop or a jet... the engine is still using the air to pull itself forward, not the ground... doesn't matter what kinda plane it is, it WILL move forward, generate lift & take-off regardless of how fast the conveyor belt is moving in the opposite direction. It's just like my desk chair & rope theory... you're the engine, the rope is like the surrounding air.
I've actually seen a plane come completely off the ground just sitting on the ramp during a big storm.... luckilly you tie them down after every flight so they don't go anywhere.
I was waiting to see who would ask that! I was thinking the same thing 
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