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the142
Well before you adjust your throw/endpoint which should be the final no solution step, please check one thing:

Its more work then you might want but...erase that model.

Open up a new model memory and name it the same. All trims to 0 or neutral on transmitter. Now unscrew your servo arm from the servo, both of them. Pull out the arm but leave the pushrods connected. Bind your transmitter, the servos will jiggle giggle and wiggle. Now connect your servo arm so that the surfaces are straight. Check travel, if needed cut off the one the travels most so that both travel equal end travel
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the142
This move will ensure that your servo arm is center on servo gear/motor
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FlyteTime
Quote:
Well before you adjust your throw/endpoint which should be the final no solution step, please check one thing:

Its more work then you might want but...erase that model.

Open up a new model memory and name it the same. All trims to 0 or neutral on transmitter. Now unscrew your servo arm from the servo, both of them. Pull out the arm but leave the pushrods connected. Bind your transmitter, the servos will jiggle giggle and wiggle. Now connect your servo arm so that the surfaces are straight. Check travel, if needed cut off the one the travels most so that both travel equal end travel

Thanks for the reply 142, but I centered the servos before I started and I'm using push rods with adjustable ends so I have the ail/elev surfaces even already.
I'd rather have a bottle in front of me than a frontal lobotomy.
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FlyteTime
Ok, I think I've found out what the problem is with my servo problems. I never mentioned it but I'm using those sorry a** Tower Pro servos. It seems that the sorry buggers don't return to the same place when I move the sticks or power off and back on. Never again will I cheap out on my servos. DO NOT BUY TOWER PRO SERVOS OFF OF AMAZON.
I'd rather have a bottle in front of me than a frontal lobotomy.
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Wildthing
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Ok, I think I've found out what the problem is with my servo problems. I never mentioned it but I'm using those sorry a** Tower Pro servos. It seems that the sorry buggers don't return to the same place when I move the sticks or power off and back on. Never again will I cheap out on my servos. DO NOT BUY TOWER PRO SERVOS OFF OF AMAZON.

I bought them once and once only. They are junk
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Sidewayskiwi
Got heaps of them lost 3 in crashes one didn't work straight off the bat but hey have more issues with slop and not recentering in my metal gear servos than on the TowerPro nylons
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Sidewayskiwi
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Hi FlyteTime. Just curious about some conditions. Please correct me if I'm mistaken.

I assume that when TX and plane are ON, then all servos are on zero position. However, when you move the stick position to maximum, a pair of servos that should give identical throw, don't seem to have synced max throw angle. This is annoying on a situation when elevons should travel at the same angle. I experience that sometimes but for me, it's an easy fix. On the TX, there should be an option to set maximum throw on each servo. Sometimes it's called servo travel, sometimes endpoints. Mostly in %. Just reduce the one that has excessive one until it matches its pair. I'm attaching some pics as example with hope it might help you.

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Lots of things cause one flex in control rod hinge geometry binding of shaft in ,say a liner tube, hinge position,one hingeline stiffer than the other,let alone the real possibility of uneven throws from served mechanism
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bimoadiprakoso
Looks like a good candidate for the next experiment, FlyteTime

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      "Hungry for better accomplishments in every way"
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FlyteTime
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Looks like a good candidate for the next experiment, FlyteTime

Parkflyers International Parkjets

My Scratchbuilding Journey

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I'd rather have a bottle in front of me than a frontal lobotomy.
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FlyteTime
You got that right Bimo! The lines on that one are dead sexy! Bring it on brother....
I'd rather have a bottle in front of me than a frontal lobotomy.
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bimoadiprakoso
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You got that right Bimo! The lines on that one are dead sexy! Bring it on brother....
Let's give it a try then, brother

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      "Hungry for better accomplishments in every way"
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FlyteTime
I was able to find some Tower (Not)Pro servos that don't seem to wander on me and have fitted to the plane. Also, I added 2 more so I have a pair for the ailerons and a pair for the elevators. I didn't like the idea of the single servos for both control surfaces. I'm gonna throw it to the wind sometime this afternoon and see how she does. Wish me luck.

Also I have a couple of photos of a full size Phantom that is on display at the U.S.S Alabama battleship in Mobile. I've drive by the plane every time I go to Mobile (I live in the neighboring county) so that's one reason I'm so fond of the F-4. You don't realize how large it is until you're up close to the real thing.
f-4 battleship park.jpg  f-4 battleship park1.png 
I'd rather have a bottle in front of me than a frontal lobotomy.
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Sidewayskiwi
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I was able to find some Tower (Not)Pro servos that don't seem to wander on me and have fitted to the plane. Also, I added 2 more so I have a pair for the ailerons and a pair for the elevators. I didn't like the idea of the single servos for both control surfaces. I'm gonna throw it to the wind sometime this afternoon and see how she does. Wish me luck.

Also I have a couple of photos of a full size Phantom that is on display at the U.S.S Alabama battleship in Mobile. I've drive by the plane every time I go to Mobile (I live in the neighboring county) so that's one reason I'm so fond of the F-4. You don't realize how large it is until you're up close to the real thing.
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Looking great
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