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Old 05-06-2019, 05:40 PM
LEE JAEHUN is offline
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South Korea, Daegu
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Question
EF YAK 91" RUDDER PUSH PULL...

I have EF YAK 91" DA70.
I use pull-pull rudder but I would like to change push-pull.
I feel lose somthing Pull-pull
there is no push pull rudder servo bed to fuselage
please tell me how rebuilt push-pull rudder.
Please photo & picture.
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Old 05-11-2019, 01:18 AM
DGrant is online now
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Just havin' fun!
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Put a servo bay in it. You'll have to cut the covering somewhere, fabricate a servo bay slab out of something, and figure out where/how to install it so it's structurally sound.

Are you sure you're pull-pull that's in the plane is set-up for optimal performance? That's the first place I would go is figure out if there's really any problem, or if it's something in the set-up, or even a weak servo that's driving it.

What kind of cabling are you using for your rigging?... What brand/model servo are you using?.. There's many ways to "tune up" a rudder system, which is much easier then remounting a servo to the back of the plane.

That plane in that size really should work just fine with a pull pull system. The Extreme Flight planes are very well engineered from what I've seen.

Up to you if you want to change it around, but I'd look at some other "fix" before I tore into one of those planes... and I say that coming from alot of building experience. Moving that servo might not be your best option... for many reasons. I'm sure you thought about what it would do to your balance too... if not, I can tell you it would directly affect your CG/balance moving a servo that far back in a plane that's not designed for it. Just throwing thoughts out there is all.
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Old 05-11-2019, 07:55 AM
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Easy to do

This is how I did mine,

Works great.


This is an Extreme Flight Yak 91"
With DA 70
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Old 05-12-2019, 08:00 AM
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Old 05-12-2019, 08:01 AM
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Dear

..
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Old 05-12-2019, 08:05 AM
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Quote:
Originally Posted by DGrant View Post
Put a servo bay in it. You'll have to cut the covering somewhere, fabricate a servo bay slab out of something, and figure out where/how to install it so it's structurally sound.

Are you sure you're pull-pull that's in the plane is set-up for optimal performance? That's the first place I would go is figure out if there's really any problem, or if it's something in the set-up, or even a weak servo that's driving it.

What kind of cabling are you using for your rigging?... What brand/model servo are you using?.. There's many ways to "tune up" a rudder system, which is much easier then remounting a servo to the back of the plane.

That plane in that size really should work just fine with a pull pull system. The Extreme Flight planes are very well engineered from what I've seen.

Up to you if you want to change it around, but I'd look at some other "fix" before I tore into one of those planes... and I say that coming from alot of building experience. Moving that servo might not be your best option... for many reasons. I'm sure you thought about what it would do to your balance too... if not, I can tell you it would directly affect your CG/balance moving a servo that far back in a plane that's not designed for it. Just throwing thoughts out there is all.


Dear
Thank you.
I think so best hardware.
(futaba bls 172 × 5)
I agree too that EF best design.
But I feel scarce somthing to pull-pull.
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Old 05-12-2019, 08:13 AM
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Old 05-12-2019, 08:14 AM
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Quote:
Originally Posted by orthobird View Post
This is how I did mine,

Works great.


This is an Extreme Flight Yak 91"
With DA 70
Thank you dear 
I will rebuilt right now~^^
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Old 05-12-2019, 08:15 AM
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