Russ
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Registered: 14th Mar 04
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serious note, no wind would be passing over wings, so couldnt take off
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Kerry
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Registered: 5th Oct 01
Location: Norwich
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runways arnt 3 miles are they?
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Russ
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Registered: 14th Mar 04
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quote:
Originally posted by Kerry
runways arnt 3 miles are they?
some times more
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drax
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Registered: 5th Feb 05
Location: Sittingbourne, Kent
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quote:
Originally posted by Russ
serious note, no wind would be passing over wings, so couldnt take off
Why are you assuming the treadmill would be able to match the speed of the thrust generated by the planes engines
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Russ
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cos otherwise, it would be a shit treadmill...
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drax
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but then we'd just use treadmills upside down to launch planes into the air?
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CorsAsh
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Location: Munich
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It would take off though, the wheels aren't powered, so the plane would take off as normal but the wheels would be rotating at the speed of the conveyor + the speed that the aircraft is travelling forwards - due to the thrust of the engines.
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drax
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Location: Sittingbourne, Kent
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It would be like having a sodding tank that could to 600mph if treadmills / conveyor belts could keep up
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Russ
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quote:
Originally posted by CorsAsh
It would take off though, the wheels aren't powered, so the plane would take off as normal but the wheels would be rotating at the speed of the conveyor + the speed that the aircraft is travelling forwards - due to the thrust of the engines.
but how would wind be moving over the wings?
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Hammer
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Registered: 11th Feb 04
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time to buckle in, i can see this being a rerun 
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Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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because the fact that the wheels are on the ground is irrelevant. if it were hovering a metre above the ground, it would take off. the frictional forces on the wheels are not enough to prevent it from moving forward.
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Russ
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lift is generated when win passes faster over the top of the wind than the bottom, if there is no air passing over the wings then it wont take off, if your saying that the plane would move so fast it would be faster than the coneyor belt, then ur right, but only if it was going fast enough..
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Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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the plane WOULD move faster than the belt, think about if you stood on a treadmill on rollerskates, you apply no force, you stay in one place (theoretically), then when you pull (or are pushed) you move forward.
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Hammer
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Registered: 11th Feb 04
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quote:
Originally posted by Russ
if there is no air passing over the wings then it wont take off,
This is the assumption you have to get your head round, there is air passing over the wings.
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dave17
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Registered: 3rd Sep 02
Location: Greater London
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I cant wait to see this thread tomorrow
[Edited on 08-01-2007 by dave17]
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drax
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Location: Sittingbourne, Kent
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..... right..
EVEN if it had some way of not touching the floor.. as if it was on ice, say a converyor belt...
the thrust, generated by the whopping big fucking engines on the side of the plane, would accelerate the large winged beast of a plane forwards, generating air passing in motion of the blades of the wings.
which would then allow it to take off....
its like saying that you wouldnt be able to push a car if it was on a conveyor belt with the hand brake off and it in nutural...
as long as you exert more energy in pushing it forwards than there is of the wheels maitaining a constant rotational speed with the floor, it will move
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Hammer
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quote:
Originally posted by drax
its like saying that you wouldnt be able to push a car if it was on a conveyor belt with the hand brake off and it in nutural...
nice way of putting it 
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Russ
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im not denying that if the plane was moving, but ur assuming that the plane would stay still, that the whopping great wheels would actually turn and not just sit there like fuck off melons supporting a couple of tonnes of weight?
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drax
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Location: Sittingbourne, Kent
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Why wouldnt they turn? They do alright on the runways normally
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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quote:
Originally posted by drax
..... right..
EVEN if it had some way of not touching the floor.. as if it was on ice, say a converyor belt...
the thrust, generated by the whopping big fucking engines on the side of the plane, would accelerate the large winged beast of a plane forwards, generating air passing in motion of the blades of the wings.
which would then allow it to take off....
its like saying that you wouldnt be able to push a car if it was on a conveyor belt with the hand brake off and it in nutural...
as long as you exert more energy in pushing it forwards than there is of the wheels maitaining a constant rotational speed with the floor, it will move
Thank you. Good to know someone understands.
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Robin
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 I agreed too Ash
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CorsAsh
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Location: Munich
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Yes you did.x
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Colin
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Registered: 4th Apr 02
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quote:
Originally posted by drax
..... right..
EVEN if it had some way of not touching the floor.. as if it was on ice, say a converyor belt...
the thrust, generated by the whopping big fucking engines on the side of the plane, would accelerate the large winged beast of a plane forwards, generating air passing in motion of the blades of the wings.
which would then allow it to take off....
its like saying that you wouldnt be able to push a car if it was on a conveyor belt with the hand brake off and it in nutural...
as long as you exert more energy in pushing it forwards than there is of the wheels maitaining a constant rotational speed with the floor, it will move
Thats what I said but not in as many words, so long as theres enough thrust. Also the runway/conveyor will need to be a bit longer to take into account the increased time taken to get to take off speed caused by the conveyor belt working against the forward motion of the plane.
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drax
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Also very true colin
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Nismo
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Registered: 12th Sep 02
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What drax said is 100% spot on 
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