The Down Range Forum
Member Section => Down Range Cafe => Topic started by: billt on December 29, 2010, 12:03:51 PM
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Now THIS is a short landing and takeoff! Bill T.
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My flight instructor made a landing that short in a Cessna 150 to demonstrate to me what was possible. He landed on the 20x20 run up pad at the end of the runway, slamming on the breaks to stop. The 150 is not a tail dragger so it would not nose dive.
That take off in the video was so short I suspect there was a pretty strong head wind. On the landing he seemed to be fighting a bit of turbulence so there might have been a strong wind. I didn't see any other indications of high wind like dust or or blowing debris but then it was a pretty barren place.
He seemed to be heading up hill which would have shortened his landing and allowed the tail dragger to brake more, but made such a short take off harder. Takes air passing over the wings to get enough lift....or the prop has to be able to "pull" the plane up and I doubt a stock Cub could ever do that.
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I've seen Piper Cubs fly backwards when the wind was right.
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In slow-flight configuration, I could get the 150 to be flying a few feet above the ground at about 30 mph with no wind. All it would take would be a 40 mph wind to go backwards
Loved the "physics" of slow flight.
That thought about slow flight physics just might explain the short take off.
In regular flight attitude, speed is controlled by the throttle and altitude by the attack angle...point the nose up, the plane goes up, point it down and it goes down.
In slow flight, you have full flaps on, which that Cub did, and you have a nose high attitude which make the plane like an air brake...lots of drag.
In that attitude, you increase speed by lowering the nose a bit, reducing drag and increasing speed. You gain altitude by giving it throttle and the prop will pull the plane up a bit....everything is happening by only a very small amount and very slowly.
That Cub, sitting on the hill with full flaps and brakes was in slow flight attitude sitting still. To take off, you could hear him gun the engine and then release the breaks. The plane, being in that attitude, responded by gaining a few inches of altitude. If the wind was near 30mph, maybe less for a Cub than the 150, that could be how it was don.
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It's funny to watch a plane lift off then touch down 20 feet behind where it lifted off ;D
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All in all, you couldn't have done it much better with a helicopter. If that guy needs a job and has a desire to travel to exotic locales, I'm sure the boys at Langley are hiring. ;D
FQ13
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FQ, He's already in what many would consider an "Exotic locale" and while the pay may be lower the lack of ground fire makes up for it. ;D
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He lands with full flaps. He then fully retracts them. He then opens the throttle full, THEN once again extends full flaps, and immediately lifts off. Bill T.
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That was so the brakes would hold until the engine was up to speed.
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Its just a windy day. its a cub, they take off at like 35 mph. lol
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(http://www.ballslist.com/travel/la/helicopter.jpg)
This type can do short take off and landing also..... hahaha ....
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(http://www.ballslist.com/travel/la/helicopter.jpg)
This type can do short take off and landing also..... hahaha ....
But they don't really fly.
They just beat the air into submission ;D