I give you....the Airplane on a treadmill thread.
Question: If you put an airplane on a treadmill, and start the treadmill up, so that the wheels under the plane are turning, and then gun the engine(s) will it take off??? :D:D
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I give you....the Airplane on a treadmill thread.
Question: If you put an airplane on a treadmill, and start the treadmill up, so that the wheels under the plane are turning, and then gun the engine(s) will it take off??? :D:D
Only if it gained more airspeed than the speed of the treadmill.
Only if the power to weight ratio is off the charts.... ;)Quote:
Originally Posted by SBS933
Of course it will take off. But it better be one very long treadmill. The only thing the plane has to over come is the drag of the wheel bearings and tires from the weight of the plane with no lift on the wings. This is a very minute portion of the engine's capabilities but it would still increase the distance required to travel in order to take off. Once the plane started to move forward and generate lift, it would accelerate faster and faster until it generated enough lift to fly. It takes airspeed to generate lift, not tire speed. So if it takes 68 knots to generate enough lift to fly normally, it would still take 68 knots of forward airspeed, not tire speed to generate the lift required to fly regardless of how fast the tires were spinning.
What he said.Quote:
Originally Posted by SnoC653
But heres the deal. The speed of the plane is a product of the wheels. So if you take the ability of the wheels to turn power into speed, I.e. you negate any ability of the plane to achieve any kind of forward motion, you will never ever take off. Unless you have a jet engine attached to a glider. :DQuote:
Originally Posted by SBS933
With Mythbusters proving its possible the question is mute.:D...beside the fact that the wheels on a plane have nothing to do with the speed or motion of it, like the speed of a skateboard has everything to do with how hard you push it .:)
From my POS T-mobile thingie
I considered Bre's box one of the most infamous threads of all time. Might have been before your time though.:secret:
Myth busters did it with a piper cub. Barely an airplane. All engine, paper and wood. The power to weight ratio was off the charts. The original thread dealt with the idea of a 747 on a treadmill. So lets keep this conversation limited to a real plane. Not toys that are one step above an RC plane..... ;)Quote:
Originally Posted by Ziggy
The wheels are not powered, the propeller is. What if we take the wheels off and use floats in their place and point the plane up riverQuote:
Originally Posted by Tishimself
Man o man were her early posts during the Andy years classic......butt plugs and all:eek::D:p:eek:Quote:
Originally Posted by Wheeler
From my POS T-mobile thingie
No matter how you scale it, the properties are still the same.Quote:
Originally Posted by Tishimself
From my POS T-mobile thingie
Quote:
Originally Posted by Wheeler
Sorry, for the purposes of this argument, it has to be limited to wheels only. But tell me, with out wheels, how does the prop move forward. If they are turning 100mph due to the movement of the treadmill, how are you ever going to move forward when you can maybe generate 100mph without the treadmill...??
A friend has those pix and more, he's trying to get 'em out the the old modem now. I hear that Tom Brown is working on the old system trying to retrieve them for us all to see again, Right Here on Hot Boat!!:eek:Quote:
Originally Posted by Ziggy
Then again, While talking with Tom today he mentioned that Wendi banned him for this site. Too much competition I guess. :D
Bre and Foxy99!!!!!!!!!
Those pics should stay in the long lost files, honestly. Not something that would be productive today.....but the memories will be lasting til alzheimer sets in.
God bless the Canatard:)
From my POS T-mobile thingie
Not too sure that they would jive so well with the new and improved "family Friendly" Hotboat, but feel free to text them to me.... :DQuote:
Originally Posted by Ziggy
It will need to overcome any drag induced by an outside source and when the plane reaches V2 it will be off. And safely I might add.Quote:
Originally Posted by Tishimself
It's history man and you cant' stop something that has already happened! They're coming!! I'm sure there are plenty of people that will allow Tom to use there login info. for this little bit of history. :gathering:Quote:
Originally Posted by Ziggy
The neighbor girl gave me a little white pill, said it would help me sleep. At the first sign of dizziness I decided to come back home and lock my doors, she's bigger than me!! I wish I had my pit bull about now!
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As mentioned, the wheels and their speed have nothing to do with lift. If lift plus thrust is greater than drag plus weight the plan will accelerate until they are equal or climb. And long before the drag of the wheels could overcome the thrust the plane will develops lift which will reduce that drag to nothing. Even a fully loaded 747 can climb at over 500 feet per minute. As soon as the wings start flying the treadmill becomes a none factor.Quote:
Originally Posted by Tishimself