i have a h9 edge 540. this plane has been a pain in my a**. i have tried countless different things to get this plane to quit rolling or snapping to the left with full up elev.. when the plane is right side up and full up elev. is given or close to that. it will roll to the left. it weighs 12 lbs.. stock out of the box it did this. and i tried everything. it now has two servos in tail for elev. hitec 605's. i purchased an incidence meter. found a big twist in elev.. so i began to heat and corrected this problem. my wings were slightly out of wack. so again i corrected them. all twist is within a 1/4 deg. then the plane had 2 deg. pos. inc.. on wings. i zeroed the meter on elev. and shimmed the wings to get zero deg.. i set my thrust up and down to zero deg.. it was 2 deg. up. it has 2 deg. right thrust. this i left alone. my wings are sttaight. my tail is straight. my inc. is on the money. zero. it flys well. knife edge u name it. but when up elev. is given it roles to the left. also does this in banked turns. it will role out of the turn when given up. now inverted it flys perfect. no rolling. with full down elev. it will loop perfect loops all day and no roll. but when in right side up flight it rolls. and ive tried the stock setting of 9/16 up. and ive dropped it to under 1/2 up. i have to take so much throw out of it. its hard to control. ive checked lateral balance. my cg is at 4 1/2 inches from leading edge. ive put countless hours in this plane and it still does the same thing. it does roll slower rather than just snap on its side like it did before. it also has a saito 180. but either way it still rolls left with full up elev. ive contacted horizon and everyone in between. im about done. maybe its a lemon. and its not the wing recall thing. found that out thru horiz.. i cant figure out why it flys perfect inverted. it will do anything u want. but right side up look out. ive about put this thing in the ground dont know how many times. ud think what ever causes this would also make it do this during inverted flight. maybe i should just fly it upside down. any help would greatly be aprecciated. im so sick of this. but yet i wont give up. cant wait to get my h9 cap together. dont think id buy another h9 edge. thinking of the lanier. help anyone. im just about to crush this plane and scrap it. thanks to anyone who may be able to understand this. sorry for such a long post.. bill ps ive also tried giving rudder input during this rolling. seems to help some. but has been too cold to really get more time trying this.

posible programing problem if you have computer radio and using 2/6 mixing.See if anything else moves when you pull only elevater.Had a bi-plane that did the same thing because of a weak wing.Hope you find out ehats happening.

I've had three of these guys... I truly love them. There has been much discussion all over the place this last year about snap'n out with up elevator. Alot of guys ended up liking the plane better with the CG at 4".

Switch the elevator servos from side to side and see if the prob goes the other way. I had a futaba servo that was slow in only one direction. Also If you are using a servo reverser switch that to the other side, sometimes they are a prob espcially at 6 volts.

It is a set up problem. There have been several reported issues with this plane doing what you are describing......

Pug

when i assembled my wings. i set the dihedral at zero. i checked it with a thread run from one side to the other. it originally would have had andihedral. if i did what the book said. so i called horizon and they said this was how to do it. so i believe there straight as can be. my elev. halves work together perfect. they are aligned perfect. they work together in harmony. it did this with one servo and a dave brown push rod. but i will try to move my cg to 4 inch. that i have not tried. and i have the servos on channel 2 and 8. ailevator function on my radio. ive herd to many bad things about reversers. ive tried elev to flap mixing. nothing has helped this thing. and its more frustrating when i hear of all the edges that fly so well. i really like this plane. i should say the looks of it. but its sick. do all u gys set ur dihedral zero like the book says. i can also deflect full rudder in level flight and it just yaws from one side to the other. it does not attempt to turn or roll like if it had too much dihedral. its making me sick. thanks so much for all the replys. i cant thank u all enough. if i ever get it figured out. ill post a good reply on what i had to do. again thanks so much. bill

How much up elevator are you using,??.
Use NO MORE than 9/16"

If I use more than that, mine will try to snap out

Yepper definately sounds like Elevator transition isn't linear. Here is a little trick for split elevators. Take a straight piece of piano wire and mount it so it angles from the Elevator to behind the Rudder. Do the same thing and line-up the ends of the piano wire. Now turn on the radio and ease the elevator up and Down Full deflection and see if they have they exact movement.

Lay odds this is where your problem is.

thanks again for replies im going to try this. with the wire and elevators. and it does this even with 1/2 of throw. just not as bad. any less throw this thing takes up as much sky to loop as a b-17. thanks again. ill lick this thing yet.

Roadracer you may have a weak servo that lags under a load. If you switch the servos and it does the same thing you have eliminated the control system and can start to look for something else. Also there was some discussion about C.G. but I don't think its your problem, If the C.G. was too far aft it would snap roll not just roll, and it would do it inverted as well.

ive tried digital servos and now i have 605,s. and it still does the same thing. ive checked to see that both haves move the same. it also did this with one servo and a push rod. so ive tried several different things with the elevator and to no evail she still rolls. so ive moved my cg. i rechecked my wings for andihedral. i weighted them in the middle and heated them. to see if i could get just a teeny bit of dihedral. didnt move much but we will see. and if my elevator was really not working right ud think it would do it inverted also. so i went for the andihedral theary. i will not give up till it either smashes or i just get so tired of it. lets hope no smash. and i moved my thrust from 2 deg right to 4 deg. right. so another maiden voyage is on the way. ill let everyone know if i ever get this thing figured out. again thanks so much for all the great replies and i hope somtime i can also help someone.

EDGE lovers -may not agree-BUT-frankly I did not care for this model .
It is prone to high speed stall- -which is a snap-
The straight leading edge wing and quite small chord on outer panels will make it easy to do this.
Please ,no "Edges don't stall easily" comments.

I have a CAP 232 from Superkraft/Kangke and it rolls out to the right if you pull too much elevator. Not a fun airplane as everytime I fly it I am waiting to get "bit".

It is weird. On landing I can slow it down and it acts normally. Seems to only act up during loops or other up elevator applications. Some very small part of the wing is stalling enough to lose alittle lift only in one small spot.

One thing I want to try is to really "smoke" down the covering just to make sure I don't have a small area that is lifting enough to effect the aerodynamics. You might try that too.

If I can't get it corrected it's going to the flea market next chance but I will be talking with Kangke at the WRAMS show if I get up there.

Mine doesn't snap out. Just rolls out and aileron will catch it with no adverse effects. I think it's the nature of the beast with the highly tapered wing. Would be nice to get alittle wash out in it but those Chinese build a wing that wasn't meant to be changed. One tough wing.

Back to Bipes.

Good luck.

Roadracer,
Had a thought while browsing. (I have WAY too much time on my hands!)
Being that you have two servos on two different chanels for elevator, would you want to try giving the right half a little more travel volume?
I know. That can cause a host of probs. But what could it really hurt to give it a try?

Would a gyro help in this case? I don't have any experience with'em and they do have a wide variety of applications.

Jeff

like the Air Wild (which I love - 60 % of throw, harriers like a trainer - no snap out), the Lanier 540 (no indication of snapping) and several large Aeroworks Edges. No display what the H9 Edge does. We have several at the field doing this same thing. H9 made a very bad version of the Edge IMHO (which is too bad because I wanted one...........). When you set one side by side to other Edge's of the same size, it just "looks" out of wack.....I flew several of them, and they are unstable, unfriendly birds compared to the above offerings. Now, a lot of it could be due to the way they were set up, granted (but some of these guys are good builders/flyers). I don't own one, never built one, but I've flown them. I wouldn't buy a H9 Edge for $50 bucks.....not worth losing the radio/engine over............

Just my thoughts.......

Pug

Pugsley- you are -in my book -right on target.
Having built/trimmed -etc many models -this one was a classic example of a model which easily went into high speed stall.
I sent it to a friend - (ex TOC winner) who lives at sea level - he said the same thing about it .
Now in all fairness - if you really square it away - (trim it )and accept it is this kind of a bird - you can do some very snappy stuff and flail it like a cat's tail.
Just recognize the characteristics -and use em to advantage - don't try to change it -

well i think im going to try a lanier edge 540. ive herd good things about this plane. and i read a good report in airplane magazine about this plane. i also am going to get my h9 cap together another plane ive herd many good things about. i want a plane that i can fly comftorabley. ive only flown for little over a year. but ive learned alot and ive flown alot. everyone i tell that ive only flown this long cant believe it. but it just depends on how bad u want somthing. and i love to fly. but from what ive herd here. i think its about time to give up on this plane and move on. i have a pizzaz that i fly the pants off of. and i love it. also like the big edge if it would just quit this bad habbit. im going to try the throw difference like jazzy said. what can it hurt. ive tried everything else. if it still does this after all that ive done this time i think ill quit. but then again this is all a good learning experience. and if i figuer it out maybe i could help someone else with this plane. now if the darn wind would just quit blowing around here so i could go fly it. thanks again so much. all u gys have been a big help. this is the best part of a dreary day to get on the computer and talk about planes. take care cya bill

roadracer....

before you give up...be sure the problem is not in the dual elevator servos.
I have had servos that will not act the same when rotated in opposite directions. maybe the holding power is different when one servos is rotated in the opposite direction

ive tried different servos. single. dual. digital. ive tried them and everything in between and it still does the same thing. thanks for all the replies. bill

lets try a simple minded approach(i'm good at that)lock the wing srvos by turning your equipment on and support your plane on the bench with cans or blocks under the ailerons and see if one has more flex than the other.If the left one flexes up more than the right one it would create less lift on the left wing and make it roll out.I know it works inverted but it may only want to flex one way.I know this sounds simplistic but you have tried everthing else.

thanks i have nothing to loose. ill try it. thanks again bill

Roadrunner,
It may be an engine thrust problem. Full scale planes will also snap to the left when you add to much eleavator. The wing stops flying and engine torque takes over. In a full scale you stand on the right rudder to keep the plane from snaping to the left. In our models we generally build in some right thrust to get rid of this. It's worth a try add a few more degrees of right thrust.