Lumenier RB2205C-12 2400KV SKITZO Ceramic Bearing Motor
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Old Oct 25, 2010, 05:45 PM
planatlas is offline
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Help!

Anyone know How to use ailerons same a flaps???


Hello, I can not use ailerons works as flaps. Sorry for my english, Iīm spanish.

My airplane havenīt flaps and I want to use aileron for flaps mode.

Anyone can help me???


Thanks in advance.

Alberto.
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Old Oct 25, 2010, 05:50 PM
Codimasta is offline
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What type of Transmitter ? What receiver ?

Codimasta
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Old Oct 25, 2010, 06:03 PM
Daedalus66 is offline
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Also, what model? Using ailerons as flaps (flaperons) is a very bad idea on some models as it causes tip stalling and crashes.
Old Oct 26, 2010, 01:00 AM
planatlas is offline
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My airplane is P-40 and my radio gear is Eurgle
Old Oct 26, 2010, 07:33 AM
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I tried Flaperons on an aerobatic plane just to see how it would work and it didn't. Plane had no roll control and crashed. Expensive test!

When the flaps were deployed both ailerons sat below the wing and so the ailerons didn't work as they should. The ailerons could no longer raise above the wing TE so both were creating a bit more lift and drag, but by a slightly different amount. Worked ok as flaps but not at the same time.

I was told by an experienced pilot that if this technique was to have any chance of working the aileron must still be able to raise above the wing TE.

Greg
Old Oct 26, 2010, 08:59 AM
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Quote:
Originally Posted by RCSaturnFlyer View Post
I tried Flaperons on an aerobatic plane just to see how it would work and it didn't. Plane had no roll control and crashed. Expensive test!
That's my point, too. You can't use outboard ailerons as flaps. The exception is where they work in conjunction with inboard flaps on, for example, a glider with multi-servo wing. In some cases, flaperons will also work on a model with full span ailerons, but movement must be strictly limited.

The problem with using outboard ailerons as flaps is that it is like twisting the wing to a higher angle of attack (the very opposite of what you need). This makes the tips stall before the center section and can cause snap rolls and even spins on approach. Flaps are supposed to help landings, not make them dangerous!

Models such as the P-40 generally don't need flaps. If they do, you must install proper inboard flaps separate from the ailerons.
Old Oct 26, 2010, 09:22 AM
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ok, thanks.
Old Oct 26, 2010, 11:10 AM
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However, it is possible to use outboard ailerons as `spoilerons' (I would prefer to call them `reflexerons' as that is a more accurate description). Mix them as reverse flaps, giving an upward direction to both ailerons. This gives a similar action to washout and lessens the tips stalling prior to the center portion of the wing. It also adds drag to slow the plane. The overall action closely resembles typical flap operation.

I use it all the time with good results, but it does only work with outboard aileron designs.
Old Oct 26, 2010, 11:45 AM
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I think you will need several things. The first is a servo for each side (two servos), a transmitter that will support channel 1 & 6 - the two channels necessary to run the two servos individually. A transmitter that will support flaperons (that is a mix). When you have that capability, then you can run the ailerons as flaprons. That is you can dial in some flap and still use the ailerons as flight controls (that they will continue to operate as ailerons.

Having said all that, I have found flaperons, flaps, butterfly's etc. do not do much for me. Kinda nice to play with once or twice but just straight old ailerons get the job done with ease.

Chip
Old Oct 26, 2010, 11:46 AM
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I have used Zaurak3's technique -- ailerons up. That reduces lift requiring the plane to fly more nose up. That than increases drag yielding slower flight. It worked that way for me on several models. Don't know how well it would work for the P-40 though.
Marion
Old Oct 26, 2010, 03:21 PM
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I have do flaperons in my radio gear and 2 servos for each ailerons. What is Zaurak3's technique?
Old Oct 26, 2010, 06:27 PM
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Quote:
Originally Posted by planatlas View Post
I have do flaperons in my radio gear and 2 servos for each ailerons. What is Zaurak3's technique?
planatlas - it's what I described a few posts up. I'm not familiar with your transmitter, but, if you can program flaperons with it, you should be able to program what I call reflexerons (reverse flaperons) with both ailerons deflecting upwards. Is your plane the Kyosho P-40? If so, I believe it does have the scale outboard ailerons, and should work well.

Program about 10-degrees of up ailerons using the flap switch, take off in the normal manner to a safe altitude at cruising speed and try it. The plane should slow with a gentle decent, but you should still have control - if not switch out and re-assess. You may need to adjust the angle of deflection a bit. Keep the nose slightly raised.

This is especially useful with fast models that normally need a long landing approach. If you have a small field, you can shorten the approach and slow the landing with this function.

Good luck!
Old Oct 26, 2010, 06:48 PM
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We stilll need to know some more about the Transmitter and receiver.


If it is this one
https://www.rcgroups.com/forums/show....php?t=1123610
then the manual at
http://www.r2hobbies.com/manuals/rcps61207.pdf
on page 31 makes it pretty easy to setup flaperons and/or spoilerons.

BUT, look at post 22 in the Rcgroups...maybe not so easy???
Last edited by kg6uvp; Oct 26, 2010 at 07:01 PM.


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