Modern STOL design explained?

[tian yu]

Hello there. I'd like some clarification from any1 having info on the Kodiak's wing design..taken from the website:

So how does Modern STOL Design inspire confidence through technology?
http://www.questaircraft.com/uploads/modern_stol_design/image_p2.jpg Allison Ranch demands a 60-degree turn on final, and every knot over 70 means using more runway for rollout. KODIAK’s discontinuous leading edge helps give a skilled pilot the ability to make this approach possible.
Here’s how: The outer section of the airfoil provides lift and full aileron control at airspeeds lower than comparably-sized airplanes can even fly. The sudden change in the airfoil halfway down the wing creates a vortex that keeps airflow moving where you need it most.
This is just one of many features that give you the confidence to fly at speeds and angles normally associated with aircraft half the KODIAK’s size.

My question, how does the outer section of the wing provide more aileron control at low speed? And I got lost on the vortex issue...

Any explanation would be MOST appreciated!

[Lineboy4life]

Bit of a thread drift - I heard the Kodiak has had its payload dramatically reduced in the certification process - any truth to this rumor?

tian yu - I think this will have something due to the wing chord line/angle of attack reducing from the wing root to tip, hence the inboard portion (root) stalls before the tip (aileron end) enabling aileron authority throughout the stall. But it's been a few years since flight school so other more knowledgeable types could perhaps elaborate. :}

[tian yu]

tnx Lineboy! But arnt most planes designed that way? or perhaps in this case the chord angle is a lil higher? I checked the specs and the dihedral is only 3 degrees. Hmmm...

[Karl Bamforth]

Tian yu,

Its known as a saw tooth or dogtooth leading edge.

I hope this link is of some help.

Aerospaceweb.org | Ask Us - Wing Vortex Devices (http://www.aerospaceweb.org/question/aerodynamics/q0228.shtml)

Where are you in Malaysia ? MIAT?

[tian yu]

WOW!!! :ooh: Now THAT answers alot of my questions...:ok: Thanks Karl!!

I'm currently in Dumaguete City, Philippines kinda near Cebu undergoing my flight training, well not really undergoing since im working here already. Not too keen on MIAT at the moment but I just might consider it in the near future :) Maintenance + Pilot knowledge = A good all rounder aviation enthusiast. Too bad im on the wrong continent for it.. hehe*

[Karl Bamforth]

Glad it was of help.
I am in Langkawi, work as Chief Maintenance Officer for the flight school and obviously have nothing better to do today. :ok:

[tian yu]

Wow I'm honored! :) Nice fleet you have at Hm Aerospace. Hows things buzzing around there lately?

[djpil]

Outer wing leading edge droop was developed by NASA Langley (http://oea.larc.nasa.gov/PAIS/Concept2Reality/spin_resistance.html)for spin resistance.

[VH-XXX]

That wing pic looks identical to the leading edge of a Cirrus wing.