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Home✈️Aircraft🚁Helicoptere-BladeOther › Throttle trim CP?
09-06-2006 12:40 PM  14 years ago
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hottuna

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Vienna

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Throttle trim CP?
---> Newbie question (I've search but didn't find anything)

When the 4in1 is armed and I move the throttle trim (just a little bit) the main motor starts spinning, but not the rear. I've seen some videos where the opposite happens (and how it should be?!)

Adjusting the unit does not make any difference. Is there something I can do, or is it normal?

I have Lipo battery if that helps.
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09-06-2006 02:20 PM  14 years ago
Darren Lee

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Woodstock, GA

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Has it been flown yet? Does the tail hold? You should plug in the battery with the throttle trim all the way down, then move to center position after 4-in-1 arms. Yes, the tail motor usually starts spinning before the main motor, especially if the rudder trim is right of center. If not, either the tail motor is shot, or the proportional needs to be turned up.
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09-06-2006 04:05 PM  14 years ago
hottuna

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Vienna

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Yes, it has been flown. The tail is quite stable in the air. (a friend of mine flew it, I'm not so far yet)

I plug in the battery with the throttle trim all the way down, but as soon as I move the trim, just 3-4 "snap" the main motor starts spinning (of course slowly) but the tail motor does nothing. First when I give more gas, or more throttle trim the tail motor starts spinning.
Rudder trim is in neutral.

Maybe it's no big deal, I just have to fly it with no throttle trim, or let the main motor spin all the time.
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09-06-2006 04:13 PM  14 years ago
Darren Lee

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Woodstock, GA

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Something's not right, because the main motor should never start without moving the throttle stick.
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09-06-2006 04:22 PM  14 years ago
s0laris

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calgary,ab,canada

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Thats perfectly ok.

As long as the tail holds straight dont worry.

You just have the proportional dialed in lower so the tail motor is not as aggressive and thus starts later
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09-06-2006 05:01 PM  14 years ago
hottuna

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Vienna

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Proportional is between 1 and 2 o'clock. If I raise it I can't get a stable tail, no matter how much gain I add. I'll leave it like that.

Is it "wrong" to fly with throttle trim off as long as it work, or is it no big deal.
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09-06-2006 05:18 PM  14 years ago
s0laris

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calgary,ab,canada

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its best to never have trim if possible

It may be the tail motor is slowly dying. If you find eventually you need to go full clockwise for proportional, then its time to change out tailmotor and reset proportional to default
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09-06-2006 05:33 PM  14 years ago
hottuna

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Vienna

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Thanks guys You've been very helpful. I'll keep an eye on the tail motor!
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