Alaska bush planes - 80 degree flap

[tartare]

All - noticed one of the Cubs in the Alaska STOL flying competition recently was modified with what looked like fowler flaps that could extend to 80 degrees?
Is that angle of extension unusual on any fixed wing aircraft?
Wouldn't that be right on the verge of acting more like an air-brake than increasing camber?

[Flying Binghi]

Is a youtube view available ?






.

[tartare]

See

Bush-Plane Competition Spurs Innovation | Autopia | Wired.com (http://www.wired.com/autopia/2011/05/bush-plane-competition-spurs-innovation/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+wired%2Findex+%28Wired%3A+Index+3+%28To p+Stories+2%29%29%2Ffeed%2F&pid=1006)

[FlightPathOBN]

YouTube - Valdez Fly-In STOL Competition 2011 Highlights


http://www.youtube.com/watch?v=1df6Y77X6QQ&NR=1

WOW!

[atakacs]

Amazing stuff

[rogerg]

I think the flaps on a spitfire went to 90 degrees. But they were quite small. The DH Comet went to 80 or so degrees, they just provided some much needed drag.

[FlightPathOBN]

this one...

http://operationsbasednavigation.com/wordpress/wp-content/uploads/2011/04/valdezstol02.jpg

[Flash2001]

I think that the flaps on a single Otter would go to 90 deg.

After an excellent landing you can use the airplane again!

[vineet.mk]

Hi Tartare,

As long as the surfaces are turning aerodynamically (as can be seen) you can turn the flow well (e.g. reverse thrust, harriers). Though I will agree it will a a lot of drag, but that's what makes the flaps interesting - a much higher gain in lift compared to the increase in drag.

Also noticed the flap was pulled instantly, which will surely turn a lot of prop wash down, causing a good push to lift he aircraft at that speed, so in my view, this high angle at that low speed, will also cause a kind of thrust vectoring.