Will the plane take off?? Finally going to be answered.***

[DBfan187 5,000+ posts]

anyone got a remote control airplane and a treadmill?

 

[mavster 10+ year member]

anyone got a remote control airplane and a treadmill?

Hmmm, actually... I do...

 

[newusername 10+ year member]

For the plane to move forward, the force in the forward direction must overcome the resistive force of rolling friction in the opposite direction....which is a lot lower than the force in the forward direction generated by the thrust of the engines! The plane will take off assuming:

a) The plane is able to achieve a speed at which enough air passes over the wing to create lift....shouldn't be a problem.

b) The wheels (both the wheel itself and the mechanisms that allow them to spin) are able to rotate at the speed necessary. I'm not an aeronautical engineer so I can't comment on that, but I would assume that for relatively short durations, a speed that is roughly double that of the forward velocity should be acceptable. Won't take too long to get that plane off the runway. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

The plane will fly. No question.

 

[newusername 10+ year member]

anyone got a remote control airplane and a treadmill?

Like this?

 

[DBfan187 5,000+ posts]

yes

 

[mavster 10+ year member]

Hmm, I just thought about this a bit more...and realized something...

That we are all factoring the wheels and wings...but no one has taken the effect of the powerplant...which has the ability to create air pull... Pulling air over the wings and inturn making thrust.

Remember aircraft can fly with very limited air over the wings, its all powered. But not enough will result in a stall. (think of an fighter going vertical, at one point its all thrust, until he tops out and stalls out...he then has to dive to regain controllable flight).

The real question is if the powerplant on the ultralight is strong enough to propel the aircraft without a long takeoff roll...

 

[hoss 5,000+ posts]

Like this?

i call bs, there are wires and trickery afoot!

 

[tyler_fitz 10+ year member]

let it be known that i vote YES

 

[IamDeMan 5,000+ posts]

Nothing we discussed in this thread has even related to Navigation, Communication or IFE systems...
Its simple as said before, the wheels are free spinning just braking systems attached to the trucks...

But you said the plane won't lift off.

indeed wow...
Are you ****ing kidding me?

8 pages of BS to determine the aircraft won't lift off?

its common sense, no air no lift...no take off...

Jesus christ, maybe this forum should discuss the theory of turbine engines...

****, Squeeze, Bang & Blow... might interest some of these pathetic minds...

Which is wrong.

 

[mavster 10+ year member]

Like this?

Useless in this experiment, aircrafts for the most part, aren't gear powered...

 

[hoss 5,000+ posts]

Useless in this experiment, aircrafts for the most part, aren't gear powered...

wtf are you talking about?

 

[mavster 10+ year member]

But you said the plane won't lift off.


Which is wrong.

Actually not...depends on the aircraft...

With ultralights/props the powerplant is used to create a takeoff roll to gain lift and to aid with pulling the aircraft through the sky...

But if you use turbine powerplant...the powerplant pushes the aircraft through the sky.

See with props...the aircraft is light enough to glide and fly on its wings, but it still too heavy to glide on its on throughout the flight...hence why it has a prop.

But with commerical airliners like a 757, which is pretty much a flying brick. Remove the powerplants and you got squat. The Wings provide lift to stay aloft and able to glide to safety. But without its powerplants its screwed...

 

[IamDeMan 5,000+ posts]

wtf are you talking about?

Thank you. It could be pedal power for all we care. It could be trubine. It could be rubberbands. It doesn't matter. All that matter is where the thrust is being derived from.

 

[mavster 10+ year member]

wtf are you talking about?

In the youtube video the guy is testing the theory using a model aircraft which has it's gear powering it's movement...

Unlike in real aircraft...

 

[tommyk90 5,000+ posts]

I think we have two arguments going on here.
The people saying that everyone here are idiots are looking at it one way, while others who say it won't take off are looking at it another way.

Squeak, tama, njizzum, etc. are looking at it like this: The plane is able to move forward on the treadmill because the wheels aren't driven. The plane can move forward relative to the GROUND, generate enough air speed (and thus lift) and take off. This is pretty obvious.

Others in this thread are looking at it like this: The plane is completely stationary relative to the ground. The treadmill is moving at 150 mph backwards and the plane is only throttled up enough to keep the plane in the same position relative to the ground. Thus, no air speed (and no lift) is generated.

Bottom line is that we'll have to wait until the episode to see EXACTLY what they are trying to prove here.

Nobody commented on my post ^^^^^ //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

I think it explains a lot of the arguments going on.