Look! A plane takes off from a moving runway

[dash8driver]

if chuck norris got outta showbiz and quit making crappy movies and tv shows, would anyone notice?





.

 

[minitour]

if chuck norris got outta showbiz and quit making crappy movies and tv shows, would anyone notice?





.

No...but if he quit making crappy infomercials too???

-mini

 

[enigma]

what's the coefficient of friction on those dolly wheels?

If an ex-mil, now 747 driver builds a mini dolly and places it on a treadmill, what scale of 208 model must he buy in order to perform a scientifically valid test?

Chuck Norris can quit the infomercial business anytime, but I vote to keep the chick that co-stars!

 

[joe_pilot]

Is it a mini-Ditka or full size?

Mini-Ditka, in a wheelchair.

 

[Flysher]

No, actually, it wouldn't be like that at all, but I'll let you go read the other massive thread on this subject to figure out why.

Care to post a link? I tend to agree with buffettck. Tread mill is a perfect example in my mind.

 

[mtrv]

Care to post a link? I tend to agree with buffettck. Tread mill is a perfect example in my mind.

If the search function works, several weeks of thread was here. Then it jumped to an aviation magazine and so forth.

But in the end, visualize that the air mass isn't traveling backwards like the belt. The prop pulls the aircraft through the airmass, while the wheels just freely spin up for the ride.

Initially, I didn't think it would go anywhere either.

 

[enigma]

Yeah, and let's look at this incredibly stupid scenario from the side with, say, a building in the background. Sure, that airplane is going to get up to rotation speed on the "treadmil runway" speedometer...

Anyone who believes that plane is going to magically lift off with ZERO airspeed (no ambient wind) and in the same relative position to the building in the background doesn't even belong inside an airport boundary...

I'm having a bit of a problem deciding which side you're arguing.

Actually this present thread is mostly a joke, a sarcastic remembrance of the original FOURTY, or more, page thread that beat this issue till it was dead and buried.

If you care, search for the first thread and read up on it.

BTW, Not one person who originally said, "it WILL fly" changed their mind; while about ninety percent of those who were first in the "it will NOT fly" camp did change their mind after being exposed to logic and science.

regards

 

[:-)]

The aircraft WILL not take off. The airplane is NOT moving over the ground or in relation to the surrounding air mass.

There is "ground speed" under the wheels, but NO airspeed at all (no wind day) flowing over the wings, therefore no derived lift.

Hence, my previous quote concerning anyone believing that a plane will lift off a runway moving in exactly the opposite direction as the thrust (i.e. running/treadmill effect) does not belong inside an airport boundary!

I'm going to be nice and make this my only reply to your assertion. You're making a fool of yourself. I won't go further because I see that your profile shows that you've only been here for a couple of months.

As others have stated, this issue was discussed for forty some odd pages last year. Out of hundreds of persons weighing in, only about one ended up believing that the airplane would not fly.

 

[:-)]

Here, I'll help out the search impaired.

http://forums.flightinfo.com/showthread.php?t=66860&page=2&highlight=moving+runway

And,

Uhhhh, guys. the plane will fly. yeah, it got me too when I first read it, because I didn't really think it through, but geez now that it's been explained, if you're still arguing that it won't fly you need to sit down take a deep breath and think about it a little. It doesn't matter what the treadmill runway is doing, the plane gets it's forward speed through the air with it's prop. the treadmill runway doesn't affect that one bit. You need ... say 60 knots to fly, the prop accelerates the plane to 60 knots. period. It really doesn't matter if it's wheels are turning 60 knots or 120, the wheels don't drive the airplane. You guys have been fooled by the question and you're not thinking it through.

 

[nethan]

Just remember.... a wise man once said

Do not meddle in the affairs of dragons because, to them, you are crunchy and taste good with ketchup.

And if you can figure out what I mean, well, good for you.

hint: the plane will fly off the treadmill just like a plane taking off from a runway not like a rotorcraft.

 

[enigma]

ps in all fareness i never read the other thread. But i never really cared about the psychics one of the best pilots taught me this and it works.

Diesel, all you did was substitute the dolly/trailer for a set of wheels. The physics question that this thread aludes to, is alltogether different from your situation. This thread was only a joke, then buffet decided to take up the original subject and argue the already proven incorrect point.

 

[enigma]

Wow, I posted a response to Diesels post (#38) and mine now shows up AHEAD of his at #37. Freaky

edit, it did it again. I guess I should have read the announcement

 

[Diesel]

I've done this a bunch of times. What would happen in the fall we would land the floatplane in the grass and then take the floats off with a hoist in the hanger put skiis on it and it would be good for the winter months.

In the summer we would hoist the plane back up put the floats on. By the way we never got them straight. We would then lower the plane onto a big flat wide trailer kind of like what helicopters would land on.

We would then tow it to the end of the runway with the engine running behind a pickup truck. The pickup truck would slowly gain speed down the runway as i would add more and more power. You had to stay right on the rudders because our runway sucked and as the plane got lighter the plane would start to vibrate to the left and to the right. You wouldn't want it falling off the trailer before you got up enough airspeed.

As you got to 60kts you would slowly pull off in ground effect and bear the right. (this way you could see where the truck was) the truck would keep going until you were well clear and you'd be all set. Fly the plane down to the lake and you were done.

Did this for both planes twice a year for a 172 and a 180. I've got some pics I'll dig around and post. Really great of me going right over the cab in the pickup truck.

ps in all fareness i never read the other thread. But i never really cared about the psychics one of the best pilots taught me this and it works.

 

[Bjammin]

what's the coefficient of friction on those dolly wheels?

If an ex-mil, now 747 driver builds a mini dolly and places it on a treadmill, what scale of 208 model must he buy in order to perform a scientifically valid test?

A 1/50th scale of a chevy dirt mobile to be exact. By the way the video is a fake, I can prove it.

 

[Diesel]

Well if that video is fake. The pictures my boss took from the bed of a pickup truck of me doing the exact same thing is a fake too.

It's really not that big of a deal in the woods. We do a lot more stupider things than that.

My first time doing it i did it alone. My boss talked me through it and then said good luck.

 

[troy]

This thread is STILL GOING? Please, get a life. If you fail to find one, at least read the other tread that mirrors this one.

 

[Diesel]

ahhh gotcha. I should at least read through the whole post.

 

[Bjammin]

Yea, I just joshing ya. This entire thing is funny epilogue to the moving runway thread.
Asquared and I had a fun time debating the moving runway thing for a couple months. I don't think we ever reached absolute common ground, but we widdled it down.

 

[jeroom]

What I'd like to see is the guy landing on the trailer now...