planes turns right
 

ok im new at building/repairing planes, i have a biplane and only the lower wing has ailerons on it, and it needs alot of left trim, when i put it in the plane of course then doesnt want to turn very well. could the wings be warped. if so how could i go about fixing the wing or wings without taking off the monocote. could it be out of balance from left to right? if so could i through on some weight to fix it.

RE: planes turns right
 

If the engine is mounted with the head on the right side of the airplane, it could be out of lateral balance. You can correct this with stick on weights under the left wing tip. If the wing(s) is warped, try having someone twist the wing and apply heat to the covering. That should take out the warp. Might take a few tries to get it perfect, but it can be done. You can visually sight along the trailing edge of the wing (looking from the tail forward) from several feet away to see the warp. Use a bright overhead light and the warp will be easy to see in the reflected surface of the wing trailing edge.

Paul

RE: planes turns right
 

you might wqant t look at how much right thrust you have in the motor as well.

RE: planes turns right
 

im going to put the wing back on now and will check it out will let you know if i see anything

RE: planes turns right
 

i would doubt it is right thrust, because it turns pretty hard and quick, checked the wing for warpage and cant see anything, meaning i cant tell because im so new. however the top wing which is fixed to the fuselage was a little crooked, so i got that straightened out, i guess i will see if its still jacked up this saturday. hell if it still does it i think i may have to remove it from my hanger by way of dive n explode.

RE: planes turns right
 

I don't think you really want to crash it. Its just a simple matter of finding whats not right and fixing it.
Make sure both ailerons are zeroed when the stick is neutral. make sure there is not twist in either wing, make sure the horizontal stab isn't twisted, make sure the Fuselage isn't twisted, make sure the elevator halves are in sync with each other, If every thing checks out then consider putting some twist in a wing to 'trim' the roll out.

If all else fails and you're tired of looking at it, box it up and send it to me.

oh forgot another option, if you're out of aileron trim then just pop the servo wheel off and move it one or two teeth then recenter the trim.

RE: planes turns right
 

well i did all options given, i will see how it flys this saturday, if it still does it i will try to put some weight on the wing to counter this issue. see what happens i guess, its a good looking plane
got the plane with engine and servos for 50 bucks so im not complaining to much, just got to get this issue figured out, however its kind of hard since im rather new at building these things.

RE: planes turns right
 

lateral balance is important, but it would have to be extremely heavy on one wing to not even be able to trim it out. I mean real heavy. most often a heavy wing will show itself by the need for some trim and being a little sloppy in vertical maneuvers. I.E. falling off to the heavy side in loops. I really think by the sounds of it the problem must be some twist or warp some where. or there is too much incidence between the two wings, upper and lower. to check that you will really need to know exactly what kind of plane it is mfg and model, and look up the specs on it then check what you have with an incidence meter. for example if it is a Goldberg ultimate bipe, the manual should be available for download on line or some one here may just know what the incidence should be, then check with your handy dandy meter. It really sounds like something in the structure is out of alignment.

RE: planes turns right
 

YEAH, WHO MAKES IT? WHAT TYPE OF PLANE IS IT? ALL GOOD QUESTIONS!!!!! I HAVE NOT SEEN ANYTHING LIKE THIS ONLINE ANYWHERE, ITS NOT A PITTS, NOT ULTIMATE, NOR A PT-17, NOT AN EAGLE, THIS PLANE LOOKS LIKE IT WAS BUILT FROM A KIT LIKE 20 YEARS AGO.

I GOT THIS FROM A GUY HERE IN SAVANNAH AND HE DIDNT KNOW ANYTHING ABOUT IT, BUT HE WAS EAGER LETTING IT GO FOR 50 BUCKS. HE SAID IT WAS HANGING ON HIS WALL FOR AWHILE AND HE GOT IT IN A TRADE HOPING TO GET INTO FLYING, BUT DIDNT GET TO FAR IN FLYING SO ITS BEEN COLLECTING DUST.

NOW HOWEVER WHEN I FIRST FLEW IT IT WASNT SO BAD, BUT ITS GOTTEN WORSE, SO IM THINKING ITS PROBALLY A LITTLE WING WARPAGE..

TOOK MEASUREMENTS FROM WING TO RUDDER AND STUFF, THEN FROM THE TOP AND BOTTOM WING AND THERE WAS ABOUT 5/16 OF AN INCH DIFFERENCE BETWEEN LEFT AND RIGHT. GOT IT NOW TO WHERE THEY ARE ABOUT 1/8 OF AN INCH DIFFERENCE. THATS ABOUT AS GOOD AS I COULD GET IT.

RAN SOME HEAT OVER THE ENTIRE PLANE TO TRY AND TIGHTEN THINGS BACK UP AGAIN.
WE'LL SEE THIS SATURDAY WILL LET KNOW HOW IT FLYS. ROGER THAT HOOAH!!!

RE: planes turns right
 

Hey mshay, I am at the Savannah airport M-F 8 to 430 bring it by Sheltair and let's have a look...I am here now

RE: planes turns right
 

I had a problem with my trainer last year always wanting to roll to one side a not trimming out. Turned out to be a twist in the Horz stab. I could heat it and straighten it but eventually it came back. When I looked closer, I found a couple of broken pieces in the stab, so I biult a new one, we see this year if it's fixed.

RE: planes turns right
 

thanks for the offer but im at work from early am to late pm as well.

RE: planes turns right
 

well that dam thing still goes right. hell i even put it into a tree, minimal damage fixed it. then decided it needed some balancing weight on the wing. wouldnt you know it the dam thing still banked right just as much before.

now let me remind you it got worse over the 7 or so flights i put on it.

i guess i will just hang it on the wall as it looks good hanging there, well at least i got a decent asp .46 and 4 servos for 50 bucks.

RE: planes turns right
 

Offer still stands...I can go to you over lunch....

RE: planes turns right
 

You said that it was a biplane. Most if not all bipes exhibit this. If you bank left and are turning left, the nose wants to pull to the right. If this is what you are experiencing, it is called adverse yaw. It is caused by the aileron that is down creating more drag than the other aileron that is up. In other words, you bank left, pull some up elevator to make the turn, and the airplane wants to go to the right. You can take care of the problem in a couple of different ways. If you have a computer radio, dial in some differential, where you use only about 30 or 40 % of down aileron when compared to the amount of up aileron. You can also do this by resetting the control arm on the servos. The other way to correct this is to fly, using the appropriate amount of rudder when making a turn.

You often see this same thing in other airplanes that use a flat bottom wing. Notably, Trainers.

Bill, Waco Brother #1

RE: planes turns right
 

that would be great but will you be able to get on the base with no problems?

RE: planes turns right
 

it does it while flying straight tried to correct with trim, have even done a mechanical trim. have added weight to wing. and while flying straight it wants to dip the right wing hard. not really concerned with it dipping the right wing while turning because well i would be turning to the right and its no problem, but even turning to the right its hard to bring back to the left(servo isnt bad). has me confused even with adding trim, and weight to the wing it still dips right. didnt really see any warpage. like i said oh well i will just hang it on the wall.

RE: planes turns right
 

[quote]ORIGINAL: Stickbuilder

You said that it was a biplane. Most if not all bipes exhibit this. If you bank left and are turning left, the nose wants to pull to the right. If this is what you are experiencing, it is called adverse yaw. It is caused by the aileron that is down creating more drag than the other aileron that is up. In other words, you bank left, pull some up elevator to make the turn, and the airplane wants to go to the right. You can take care of the problem in a couple of different ways. If you have a computer radio, dial in some differential, where you use only about 30 or 40 % of down aileron when compared to the amount of up aileron. You can also do this by resetting the control arm on the servos. The other way to correct this is to fly, using the appropriate amount of rudder when making a turn.

You often see this same thing in other airplanes that use a flat bottom wing. Notably, Trainers.


This is not true! Most biplanes does not exhibit this!!! If you turn right (using aileron and elevator) the plane should turn right!
If a plane turns in the opposite direction it has too high wing loading...sometimes enhanced by a warped wing! That's what we call a snap roll!
The only time you can experience adverse yaw in a model airplane is when you fly a big, slow flying, flat bottomed airplane like a big CUB!

RE: planes turns right
 

Hi!
If your plane doesn't turn well in one direction it is due to the wing being warped ( you have wash-in built in in one wing) ! Difficulties to turn in one direction has nothing to do with engine trust angles!
Use a Robart incidence meter to check the wing! Bet you have a warped wing!
You should have slight wash-out in each wing tip!

RE: planes turns right
 

You might want to go back and recheck this for yourself. Look up adverse yaw.

Bill, Waco Brother #1

RE: planes turns right
 

Hi!
I know what adverse yaw looks like! But most of the time newbies experience the adverse turning effect in the air it isn't due to adverse yaw but due to the wing being warped...or too high wing loading! Been in this hobby for 34 years and helped many new guys with planes that have behaved like this.

RE: planes turns right
 

Gee,

I stand in awe. I've only been in it since 1949, and last time I checked that will be 60 years this fall. I bow to your greater experience.

Bill, Waco Brother #1

RE: planes turns right
 

ok ok who cares about hey im smarter then you and have more experience then you. i dont want to read about hey im more experienced then you, what are you guys teenagers.

listen to what im typing

i take of the plane will dip the right wing down, have max'd out the trim on wings and even put in trim in the rudder. with out putting in any turning input it will dip the right wing/turn right

i put on wieght to try to keep it from doing this but it still does it, and i put on a substantial amount of weight to the left wing. put a heat gun to the wing to try and fix a possible warped wing.

everything i have done doesnt fix it. is this a lost cause? should i give up and just hang it on the wall?
'i would like to keep flying the plane, its kinda nice looking and i like it but not willing to crash it beyond repair.

RE: planes turns right
 

One other question comes to mind. Are you sure that you are not deflecting your rudder stick when advancing the throttle. It's easy to do.

Bill, Waco Brother #1

RE: planes turns right
 

no im not doing that, because i can take off then let go of everything and while still getting altitude take my hands off the controls it will still dip to the right , theres definetly no pilot error at all.