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My flaps think they're ailerons !!

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Old 10-05-2003, 07:16 PM
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dennisB
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Default My flaps think they're ailerons !!

My flaps think they are ailerons! I have one servo on each, connected with a "y" to a futaba 8u super 8 chanl on channel six. Lower the flaps, one goes down one goes up. Reverse the channel, the same thing happens in reverse. I don't have a channel free to mix the two servos and reverse one, but don't the flaps know they are flaps? Ailerons when connected with a "y" still know to act in opposite directions. Aren't flaps taught to move in the same direction? But seriously, what's the trick for a "y setup with two flap servos?
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Old 10-05-2003, 07:34 PM
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Default RE: My flaps think they're ailerons !!

Is the push rod for the flaps on the same side of the servos??? If so just turn the servo out put arm 180 degrees so it is on the other side of the servo.

Dru.
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Old 10-05-2003, 10:17 PM
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dennisB
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Default RE: My flaps think they're ailerons !!

Both servos are mounted with the servo horns facing the wingtips, which coincides with the location of the control horns on the flaps. Reversing the servo horn 180 deg. in this position will point the horn down at the top of the wing.Reversing the servo so one is facing inboard will mess up the alignment of the control horn on the flap. This is my first flap setup...I asssumed the channel set aside for flaps would allow both servos to operate the flaps both downward as its default, just as the ailerons when "y'd" operate them in opposite directions. Any of you out there know what dumb mistake I'm making?
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Old 10-05-2003, 11:08 PM
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JohnW
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Default RE: My flaps think they're ailerons !!

"Any of you out there know what dumb mistake I'm making? "

Yes, it is just like Buzzard said. You need flip a arm on the servo 180 degrees. Specifically, you need to flip the arm on the flap that goes the wrong way.
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Old 10-06-2003, 12:44 AM
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Default RE: My flaps think they're ailerons !!

Or you can buy an EMS servo reverser Y harness.. i used this for my flaps.. works GREAT! just stay away from the "miricle Y" brand.. they start to Jitter and get wayyy out of whack after awhile. Ems says they don't have this problem.
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Old 10-06-2003, 12:47 AM
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Default RE: My flaps think they're ailerons !!

When using a "Y" your servos will always operate the same direction, either clockwise or counterclockwise. Your choices are to reverse the linkage on one of the servos as stated above or purchase a reversing "Y" that will allow you to change the direction of one servo. You could also use a "matchbox" to reverse one servo. If you had a spare channel you could use a mix to get them to work.

If your using Hitec digitals you could also use the programmer to reverse the direction of one servo.

Mark
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Old 10-06-2003, 07:37 AM
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Default RE: My flaps think they're ailerons !!

all i can say is DONT USE A "Y" LEAD! what you want to do is( if you have a digital radio) link 1 aileron to the aux1 and link the other to the ail. then use the transmitter to make the aux move the different way to the ail!. i had the same problem in my WOT 4 befor i decided to do what i stated above.
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Old 10-06-2003, 10:04 AM
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Default RE: My flaps think they're ailerons !!

Or send one of the servos to a repair facility and have it reversed.
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Old 10-06-2003, 11:03 AM
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dennisB
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Default RE: My flaps think they're ailerons !!

Thanks to all for the responses. I forgot to say that on this plane, the servos are mounted on their sides, making a simple reverse of the servo arm impossible.

For anyone else in this fix, I'll let you know that I called Futaba and they told me that without a spare channel, there is no mix to get flaps to work together. SO...either a "y" servo reverser, or as one person suggested, have the servo itself reversed.
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Old 10-06-2003, 03:08 PM
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tinman
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Default RE: My flaps think they're ailerons !!

how bout a 'y' reverser? http://www.cermark.com/Merchant2/mer...t_Code=EDR106Y

if ya look around ya may find a cheaper one...[8D]
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Old 10-07-2003, 09:23 AM
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Default RE: My flaps think they're ailerons !!

i keep two y connections in my box. one straight and one reversed. most of my stuff requires the reversed for the ailerons to work right. if you have used a reversed y on the flaps switch to the straight y or the other way around. I am assuming that you only want them to operate as flaps and not as programed flaperons or such...
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Old 10-07-2003, 09:56 AM
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Default RE: My flaps think they're ailerons !!

If the servos are mounted on thier sides, then can you mount one servo on the "other" side??? Flip the front now to the rear?? If you put the out put gear in the front for one servo and at the rear for the other servo that will get the servo reversed.

Dru.
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Old 10-08-2003, 11:32 AM
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Default RE: My flaps think they're ailerons !!

Ditto on blvdbuzzard.. I think either reversing the arm (it seems you don't have much clearance) ot turning one servo around so it faces the oposite... servo will efectively reverse them...


There is anonther way... Use one FUTABA servo on one side and a HITEC servo on the other.. they move in opposite directions straight out fo the box!!!
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