Long takeoff with flaperons

[Gabe]

Here is an interesting publication I found. I skimmed it over breakfast this morning. I will need to take some time to play with and fully understand the equations:

www.nar-associates.com/technical-flying/gear&flaps/gearflaps_part2_wide_screen.pdf

[19000rpm]

Interesting stuff Gabe I'll leave it up to you to work the math out.

It seems that the authors intent was to deliver information about slowing down for landing rather than taking off and also what happens if you need to do a go-round and already have the gear and/or flaps down.

One key thought in there is that, to paraphrase; having either too high, or too low, a velocity both degrade climb performance and that having both the gear and or flaps down results in a higher climb rate at a lower velocity than if you have a clean plane.

This statement would seem support the assumption that you if you use flaps in the right degree on take off (about 30%) you get lift sooner than if you don't use them and as soon as you get that lift you need to retract them and continue with the power full on to get maximum rate of climb.

I think that fairly well bears out what you've found in your testing so far.

[Gabe]

I'm more interested in determining if the addition of actual, full functional flaps, instead of flaperons, would be beneficial in STOL with EDFs. I know it would help with landings.

Time for some research.

[Gabe]

Found some good information if anyone is interested:

Flaps and Slats:
www.aerospaceweb.org/question/aerodynamics/q0008.shtml

Takeoff and Landing Flap Settings
www.aerospaceweb.org/question/aerodynamics/q0056b.shtml

Lift Coefficient & Thin Airfoil Theory
www.aerospaceweb.org/question/aerodynamics/q0136.shtml

Reference Area and Lift
www.aerospaceweb.org/question/aerodynamics/q0078.shtml

Calcs on the Habu to follow shortly.

[19000rpm]

Good stuff. Looking forward to the Habu calcs.