Is it okay too

surfnaked said:

Move the clevis closer to the surface to get more throw? Ive ALWAYS done that and never had any problems but now im worried after reading that huge thread on (ick) rcu.

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You just said that you've always done it successfully right? There certainly becomes a point a where the mechanical advantage of the control surface over the servo will cause the servo to fail but as long as you are using appropriate servos for the application you should be fine. Now I havent read the thread but I know that there are a lot of idiots over there and I can just see them putting standard Futaba 3003 servos in a 25% Cap and trying to get 45 degrees of deflection. And we all know what would happen there :wink:

But your a Pro-Bro so just use common sense and you'll be fine.

surfnaked said:

Move the clevis closer to the surface to get more throw? Ive ALWAYS done that and never had any problems but now im worried after reading that huge thread on (ick) rcu.

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It is okay, but it is always better to go out on the servo arm if you can. Being further out on both also reduces the "percentage slop" in the connection.

Theres a big difference having incorrect mechenical advantage on a small .40 size plane then a bigger one. This is one of the big reasons so many morons had trouble with there F90s. It only gets worse the bigger you go......

dhooks said:

Theres a big difference having incorrect mechenical advantage on a small .40 size plane then a bigger one. This is one of the big reasons so many morons had trouble with there F90s. It only gets worse the bigger you go......

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So its no big deal on these little planes? I just dont see any other way to get the throw i want.

surfnaked said:

dhooks said:

Theres a big difference having incorrect mechenical advantage on a small .40 size plane then a bigger one. This is one of the big reasons so many morons had trouble with there F90s. It only gets worse the bigger you go......

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So its no big deal on these little planes? I just dont see any other way to get the throw i want.

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I didnt say its no big deal ....just less of a problem. Running my endpoints on my servos out to 140% I can get about 45 degrees of throw at just slightly less then a one to one ratio on the surfaces. You want the best setup possible on any size plane. Ive saw some setups that would make you cringe....... How much throw are you trying to get anyways?

my epa goes out to 125 :roll: so should i go with long servo arms and move the clevies out at the surface? and im going for atleast 45degrees

i have those

ok, i have the clevis at the end of the servo horn and at the second hole from the bottom on the control horn, is that bad? I really dont want to move servos and bend new pushrods.

There shouldn't be any reason to move servos. The longer servo horns will make a big difference. The setup you described sounds like some I've had, but it's not great. If you are really working the plane, i.e. blenders or wall, you may bust something. Without seeing a pic, knowing the plane, what servos you have, and what you're doing with it, that's all we can say.

Gordo said:

There shouldn't be any reason to move servos. The longer servo horns will make a big difference. The setup you described sounds like some I've had, but it's not great. If you are really working the plane, i.e. blenders or wall, you may bust something. Without seeing a pic, knowing the plane, what servos you have, and what you're doing with it, that's all we can say.

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Ditto to Gordos words of wisdom....If you worried about it post some closeup pics so we can look at it.

dhooks said:

Gordo said:

There shouldn't be any reason to move servos. The longer servo horns will make a big difference. The setup you described sounds like some I've had, but it's not great. If you are really working the plane, i.e. blenders or wall, you may bust something. Without seeing a pic, knowing the plane, what servos you have, and what you're doing with it, that's all we can say.

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Ditto to Gordos words of wisdom....If you worried about it post some closeup pics so we can look at it.

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It would be kindof hard for me to do that at the time but just some pics of linkage setups would really be appreiciated. With all the bad luck ive been having lately im getting paranoid about my planes.