Problem with 30cc Sbach sugestions please

[Aerobeez]

Still having problems. I moved the cg back like you said plane became almost uncontrolable. I played
with the cg a little no help. right now i am at 5". I noticed if I turn or loop and use very little elevator
it flies good but as soon as I add more elevator for a tighter turn or loop it washes out like it stalls,
Are you getting other complaints about this problem? I can not get this plane to fly right

[MENTION=4218]dirtbikebobby[/MENTION] Can you please give us more info about the plane.

 

[dirtbikebobby]

@dirtbikebobby Can you please give us more info about the plane.

This is the plane I have with an OS gt33 engine Spectrum DX8 radio with the good receiver, Hitec HS645mg servos
2- 2000 mah Life batteries. What else would you wamt to know?

http://aerobeez.com/73-26-Sbach-300-30cc-Gas-3D-ARF-V2-Black.html

 

[dirtbikebobby]

@dirtbikebobby Can you please give us more info about the plane.

What elevator servo torque rating do you recomend. It looks kike guys are using 300-400 oz
My 654's are only 133 am I under powered?

 

[Bushwacker]

Do you have the voltage set correctly for you servos? Those should be set to either 4.8v or 6.0 the latter giving the 133 oz-in. Even if your servos were under powered, which I think they are for that size plane. I don't think they would do what you described. Didn't you say it only does this while in the air? Wonder if you are getting corrupted signal or fade while in the air at any significant distance. Have you done a range check? Do you have another RX you can throw in there. I would try swapping out the RX with a different one if I could and if that checks out I would try a different esc if I could. I would also test the servos. It's going to be a process of elimination brother. I know it sucks but guessing until you get sucks more. All your hinges are glued tight right, no big gaps or anything? Im just throwing ideas out here.

 

[BirdStrike]

I agree that the servos could be stronger, however I doubt they are causing you the issues your having. I don't think it would be a receiver issue either due to the fact your having problems at the same low speed elevator maneuvers, and not all while on the ground or in regular level flight. It just seems like a CG issue, but I know you followed aerobeez instructions and tried an inch back from their original point.

 

[Bbcorvette18]

Does it roll out to the same direction everytime? My guess is elevator halves not synced perfectly. However 645s aren't the best servos. Slow and weak.

 

[Aerobeez]

[MENTION=4218]dirtbikebobby[/MENTION]

Thank you for giving us more information. When did you start having this issue? Is it possible we can get a video showing exactly what the airplane is doing? It would help a lot of help if we can see the tail functioning.

 

[I Love Nachos]

Usually in a loop you have to add a little right rudder to keep any plane flying straight. I would suspect what some of the others have mentioned.

Is it a dual servo elevator?

Has the plane ever been crashed and repaired?

Is it at all possible to get a video of the tail surfaces working?

Do you have any type of mix programmed in to your radio?

Send pics of the plane and maybe one of us can spot something.

 

[3dNater]

Any plane can snap out of a turn if it is too tight. You can stall the wing at any speed by changing the angle of attack. Are we sure this is not the issue? I think a video would really help.

 

[I Love Nachos]

Also where are you located? Maybe one of us is close by?