Mighty Mini Arrow Oscillations

[jbeckwit]

Greetings - just flew my Arrow and at higher speeds I get vertical oscillations. Seems unrelated to throttle position - only speed - high throttle level or climb - or low throttle but descent. Using a Spektrum AR630 receiver and NX8+ Tx. with and without Safe - but AS3X on. Any ideas, thoughts?? TIA

 

[Mr Man]

Greetings - just flew my Arrow and at higher speeds I get vertical oscillations. Seems unrelated to throttle position - only speed - high throttle level or climb - or low throttle but descent. Using a Spektrum AR630 receiver and NX8+ Tx. with and without Safe - but AS3X on. Any ideas, thoughts?? TIA

It has to do with the AS3X, it's over-correcting.

 

[jbeckwit]

My suspicion as well - but I'm just using the default settings. I'll tone it down and see if that helps. Kinda fun to watch though (just not a good idea....). Thanks

 

[Houndpup Rc]

Greetings - just flew my Arrow and at higher speeds I get vertical oscillations. Seems unrelated to throttle position - only speed - high throttle level or climb - or low throttle but descent. Using a Spektrum AR630 receiver and NX8+ Tx. with and without Safe - but AS3X on. Any ideas, thoughts?? TIA

Are you talking about that when you get up to higher speeds your air frame starts bouncing?

 

[AIRFORGE]

Be sure there is no slop/play/slack or flex between the servo, pushrod and control horns. It can sometimes cause that. If it persists you can try reducing the AS3X gains.

 

[LitterBug]

How do your throws look at full rates . If the control surfaces move too much/far, that causes the controls to be super reactive, and the AS3X will have a tendency to overcorrect as well. Is there a way to disable the AS3X with a switch and see if it changes with it turned off? Is it possible to set the AS3X gain with a potentiometer while in flight? You may be able to fine tune the gain if so.

It's possible that your airframe is bending at speed/load.

 

[jbeckwit]

Litterbug - all good answers - much appreciated. I'll check 'em out. On the variable AS3X - that's a possibility, but will be new territory for me. I've never used that variable knob for anything - a good time to try it. Thanks!!

Be sure there is no slop/play/slack or flex between the servo, pushrod and control horns. It can sometimes cause that. If it persists you can try reducing the AS3X gains.

Thanks - good ideas. And working the gains idea.

 

[jbeckwit]

Are you talking about that when you get up to higher speeds your air frame starts bouncing?

Correct. To be more specific - the back end oscillates on the pitch axis at higher speeds.

 

[Houndpup Rc]

I have that problem too! I thought it was my gyro make getting a little shook up! lol

 

[jbeckwit]

I have that problem too! I thought it was my gyro make getting a little shook up! lol

Pretty good bet it’s the AS3X overreacting - at least in my case. I’m using the default settings, but I can turn them down so, we’ll see. Again, I’m using a Spektrum AR630 with a NX8+ Tx.

 

[Foamforce]

The fastest way to confirm is to fly it and turn off AS3X. If the oscillation goes away, that’s what it was.

On my cheap gyros, I can set the gyro master gain with a knob on my Tx and tune it mid-flight. I would imagine you can do the same with yours.

 

[jbeckwit]

The fastest way to confirm is to fly it and turn off AS3X. If the oscillation goes away, that’s what it was.

On my cheap gyros, I can set the gyro master gain with a knob on my Tx and tune it mid-flight. I would imagine you can do the same with yours.

 

[jbeckwit]

Thanks - that’s pretty much my plan. I do have a control knob on my NX8+ I can use - but have never done that before - good time to learn….

 

[Houndpup Rc]

I can't change the settings on my gyro so I might just put the control rod further in on the servo arm, it's all the way out right now.