Hi, new here! Vector on bixler, gain and pids? Help!

[SnoozeDoggyDog]

Loopdreams

That is  not a nice attitude!

Sorry if someone has been offended or in any other way been upset...
Yes, i flied helicooters. And yes, i was quite good at it.
I stated in my first post that i have got 6 planes.

And there is a whole different story to fly planes than to fly helis and quads.
I can make my way with a plane. But that is if the plane reacts and functions as it should.
If the weather is nice with no winds, and good visibility so i dont loose orientation.
I am a beginner with planes. But i can fly...
But to tune a FC, and perhaps getting into situations where it misbehaves,  is more than i can handle.
I can barely recover from anything at all. So anything the vector woud do, would lead to a crash.

OK, this is my story.
Built quads, flew quads, bought phantom 3, flew phantom 3.

Sold everything I had to get into fixed wing.

Bought axn, crashed axn, repaired axn, crashed axn, fixed axn, crashed axn, flew axn.

Bought Talon, fitted vector and changed airframe to V tail, ran wizard, set level and set up what I thought we RTH and fail safe. Flew Talon on a maiden and other than it nosing down a bit I flew it without issue. Landed great.

So I mean to say that I had about 40 mins on the axn actual fly time before moving to a vector. And probably the least advice I've had about any aspect of the setup was the vector.

If it's a 2nd hand unit perhaps try zeroing the gyros.

Have you centered your servos? Are you control surfaces "flat" when you power up on a level surface?

[FPVSteve]

Maybe you're expecting too much from the flight controller? They don't instantly make a plane impervious to all weathers

[Nozer]

Loop: Guess you have a point..
For for me the problem is that i need full attention on what i do. And i can barely compensate for gusts of winds. As long as the flying is on my terms, and i only have to compensate for my own misstakes i can solve it in 50℅ of the cases. But then its more like "ok, i pulled left and its wrong, then i try left instead"...
The bixler might be an easy plane to control. But because i have problems wirh the vector engaged. It puts me in a situation where i for sure cant recover if the vector all by a sudden banks or stall the plane.
An i can tell there is a big difference flying planes conpared to helis :)
Helis is actually i while since ibflued, so im quite rusty. Mainly flied quads the recent years.

[SnoozeDoggyDog]

Loop: Guess you have a point..
For for me the problem is that i need full attention on what i do. And i can barely compensate for gusts of winds. As long as the flying is on my terms, and i only have to compensate for my own misstakes i can solve it in 50℅ of the cases. But then its more like "ok, i pulled left and its wrong, then i try left instead"...
The bixler might be an easy plane to control. But because i have problems wirh the vector engaged. It puts me in a situation where i for sure cant recover if the vector all by a sudden banks or stall the plane.
An i can tell there is a big difference flying planes conpared to helis :)
Helis is actually i while since ibflued, so im quite rusty. Mainly flied quads the recent years.

So turn stability off ....

[Nozer]

So turn stability off ....

Why did i then bought it in the first place?

[FPVSteve]

ARE YOU SURE THAT THE CONTROL SURFACES ARE GOING IN THE CORRECT DIRECTIONS WHEN STABILISATION IS ENGAGED?


CHECK - THEN CHECK AGAIN.

[Brucey]

Why did i then bought it in the first place?

Exactly.

Beginners shouldn't be starting with autopilots. It's just another thing to cause problems. Start simple and have a spotter so they can help talk you round a circuit.

Where are you located? There might be an experienced member nearby that can help

[SnoozeDoggyDog]

Why did i then bought it in the first place?

Turn it off to troubleshoot your issue. Narky!

And Steve is correct, check your surfaces. I had mine reversed on one occasion and I crashed obviously. I had no idea it was my fault.

[SnoozeDoggyDog]

Exactly.

Beginners shouldn't be starting with autopilots. It's just another thing to cause problems. Start simple and have a spotter so they can help talk you round a circuit.

Where are you located? There might be an experienced member nearby that can help

#cough# He's not a beginner #cough#

[Brucey]

Not so sure... it's a bixler ffs

[FPVSteve]

A bixler should self-stabilise on the roll axis anyway to some extent - it has dihedral built into the wing tips so it always wants to roll back to center.

There's something very wrong with this vector setup and I'd bet it's related to the control surfaces, it's a super-easy mistake to make. Failing that it's either the servo centres haven't been set properly, the trim is wrong or the gains are not set properly so it's over or under-compensating.

Start from the top and if any of these doesn't check out, sort it out before going to the next step.
a) are the control surfaces working properly in MANUAL MODE? (ground check)
b) does the plane fly in a controlled manner in MANUAL MODE (i.e. can you set 1/2 throttle and watch the plane fly hands off).
c) are the control surfaces working properly in STABILISED MODE? (ground check)
d) does the plane fly in a controlled manner in STABILISED MODE?
e) will the plane come back when RTH is set?

Control surface check (standing behind the plane)
--------------------------------------------------------
ROLL RIGHT - Right AIleron will go up, Left aileron will go down
ROLL LEFT - Left aileron will go up, right aileron will go down
PULL ELEVATOR - Elevator will come up
PUSH ELEVATOR - Elevator will come down
RUDDER LEFT - Rudder will go left
RUDDER RIGHT - Rudder will go right

Stabilisation check (standing behind the plane)
--------------------------------------------------------
Roll it left - RIGHT aileron will go up, LEFT aileron will go down
Roll it right -LEFT aileron will go up, RIGHT aileron will go down
Nose it down - Elevator will come up
Nose it up - Elevator will go down.

If all of those check out and it's still playing up you either:

• have an issue with your gains so the plane is either set up too neutral and not stabilising very well (increase the gains) or the plane is oscillating because the gains are too high (so turn them down).
• or, your trims are not set properly - set them to neutral position on both the plane and transmitter, then balance the plane properly by making sure the CoG is correctly set.

[Nozer]

Steve:
Thanks! Good information!

I have tried the plane manual. And as far as my experience goes, it flied pretty decent.
Trims transfered after.
All surfaces are compenssting in the right directions. Have checked and doublechecked this several times.
In 2D mode it flies and does it job so to say...
It can work pretty ok and just feel "untuned". But then, all of a sudden, sometimes after 5-8 minutes something happens and it bank or dive without any input.
I have had thid behavior both close with good RSSI, and further away. For me that eliminate FS due to lost reception.
But if something is seriously wrong with the rx...maybe.
But why dosesnt it just go into RTH in that case?

I mentioned earlier that i am a bit concerned about my servos in the cold weather.
They are sometimed really hard to move. So i dont think its impossible that the untuned feeling of the plane and the sudden pitch/roll is because of that. Servos more or less lock up.

All settings in the vector is pretty much default. Have not changed anything that i belive can cause a behavior like this.
All i have changed is RTH height, max allowed distance & height. And osd layout.

Will look over it once again and recenter servos and check settings.

[Nozer]

Ok, things are starting to make progress...
But today i saw something that can explain my problems. But i dont know what to do?

Recent flights has been on pretty windy days. And flight in manual have been a bit unsteady. So the trimming in manual have been hard to accomplish to 100%.

Today there was only a slight breeze, so i tried to trim it properly.
What i noticed was that there is a pretty nasty roll to the right with the surfaces centered. To get the plane to level i had to trim it to the left pretty much.
When looking at the surfaces its like 5mm off center now. But the plan flies straight?

What the heck is this?
Could it be because the motor twists the plane?
Have a raised mount and a 9x6 prop.

[FPVSteve]

Have you got anything in the wings that might be throwing it off balance?

video transmitter? receiver? antenna? a weight? LED light? Big servo in one wing, small one in the other?

Basically - does the plane balance on the ground, or does it "tip over" - in which case, put a small weight in the other side until it balances

[BlueFlyer]

Do you have anything that might be causing more drag on one wing than the other? VTX antenna or similar?