joeccrc

My Feedback: (3)

I'm building a Mr. Mulligan, sort of following plans by Bowers. The plans have allot to be desired. But that’s my problem. Anyway, since I’m not exactly following the plans to the point I’ve redrawn the wing. I was thinking wouldn’t Air breaks on it be a hoot. Problem is I’m not sure how to go about doing it. Could I get some input from the masses? Photo of the wing may help.
Thanks

krossk

My Feedback: (27)

Air breaks could be catastrophic on any model -
you might want to investigate air brakes instead

FlyerInOKC

My Feedback: (6)

I have seen airbrakes on low wing aircraft but never on a high wing. I would go with flaps instead they will perform the same function. I am currently building a Ryan SC-W this is a low wing aircraft which was designed with an airbrake mounted to the belly between the main gear. The airbrake is used in lew of flaps. The only other times I can think of that airbrakes are useful are dive bombers during a dive to give more time to sight in the target or large commercial jets to slow the aircraft down after touch down in a landing.

Mike

Edwin

My Feedback: (2)

A Mr. Mulligan will stop plenty fast anyway when you idle down. Doubt you have much chance to use it.
Edwin

joeccrc

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Ok, Thank you for the input. So you think for the most part a high wing airplane wouldn't have time to use them anyway. I guess I was thinking of Flaps. They just turn down on landing?

Acs_guitars

My Feedback: (3)

Yes, Flaps just hang down... Airbrakes/ dive brakes split horizontaly. Flaps are what you want, place them inboard of the ailerons next to the fuselage.

joeccrc

My Feedback: (3)

Thanks for the drawing, that helps allot. Okay, so I'd locate the towards the fuselage. Would they need to be on a veritable servo or a fixed servo like landing gear, so they are either down or up. Photo is just a size idea, I know they would be on the underside. How large? This might be fun.

Edwin

My Feedback: (2)

Not all high wing planes are created equally. A streamlined fuse design acts very different from a big round cowl design. A large amount of frontal area (such as the mulligan has) like a P-47, cessna 185, and such can slow the plane down quickly as soon as you throttle way back. Flaps are a great idea. Spoilers or dive brakes wont do you much good unless you have a very aerodynamically clean design like a high lift sail plane. They use spoiler/dive brakes to make sure you dont over shoot your landing zone. It takes a fair amount of skill to manage you lift to the landing zone. You dont get much of a second chance without an engine.
Edwin

joeccrc

My Feedback: (3)

Thanks Edwin. From what your saying, my fat, round, short, overweight Mulligan will slow down just fine. Still it was fun Blogging with you. Thanks again.

BMatthews

Yeah, the big cowl along with a relatively light weight will slow things down in a hurry. Another air brake that is available to you with an electric motor is to turn on the throttle so the motor is just barely spinning and let the air freewheel it up to speed. That prop disc acts like a big air brake. It's like how a gyrocopter stays up but in this case the gyrocopter blades are not lifting but just adding lots of drag.