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re: Can this 747 take off?
Posted on 4/13/24 at 9:47 pm to Street Hawk
Posted on 4/13/24 at 9:47 pm to Street Hawk
how is this thing 25 pages long now?
If the belt speed matches the wheel speed 1 for 1 but in the opposite direction then the plane would never move in a forward direction, hence not enough airflow across the wings so it can not take off because it is not moving along the x axis
And adding thrust as a forward vector does not count because the wheels only roll forward as a result of that vector. If the forward vector from engine thrust is combined with the equal vector in the opposite direction from the treadmill motion then the net vector is 0
If the belt speed matches the wheel speed 1 for 1 but in the opposite direction then the plane would never move in a forward direction, hence not enough airflow across the wings so it can not take off because it is not moving along the x axis
And adding thrust as a forward vector does not count because the wheels only roll forward as a result of that vector. If the forward vector from engine thrust is combined with the equal vector in the opposite direction from the treadmill motion then the net vector is 0
This post was edited on 4/13/24 at 9:53 pm
2
Posted on 4/13/24 at 9:57 pm to doliss
quote:
how is this thing 25 pages long now?
B/c this country is full of fricking idiots.
Posted on 4/13/24 at 10:35 pm to doliss
quote:
And adding thrust as a forward vector does not count
but it does
quote:
If the forward vector from engine thrust is combined with the equal vector in the opposite direction from the treadmill motion then the net vector is 0
The thrust from the engine and the motion from the treadmill in the opposite direction arent equal though. Thats where you are messing up. The treadmill and the free spinning wheels cancel out allowing the forward thrust from the engines to prevail.
Someone earlier in the thread had a good analogy. If you are on a skateboard on a treadmill, the wheel speed will always equal the treadmill speed and you will stay stationary. If someone hands you a rope while you are on the skateboard, can you pull yourself forward? Of course you can. In that example your arms are the engines/ props and the rope is the air.
quote:
No it can’t. The wheels are the only thing moving in place and there’s no air going over the wings.
Youre wrong too
This post was edited on 4/13/24 at 10:37 pm
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