I am puzzled since this does not happen when I'm flying Velocidrone (with the same TX16s radio as the controller).

When I fly both my GEPRC Phantom or my Eachine Tyro99 and go back and forth practicing when I turn around 180 I often end up much higher than when the turn started.

I'm not managing to be aware what is happening while flying with my goggles (would be easier and does NOT happen when flying LOS).

Any ideas of what bad coordination perhaps between right and left stick I might be sneaking in?

Thanks a lot.

It's all down to throttle management. When you turn and roll, some of the props need to speed up and some need to slow down to make the quad actually turn in the air. The faster spinning props can make the quad gain altitude if you don't mix in some throttle adjustment with the turns. It's all just about practice until you get the required muscle memory to do it right.

Thanks Snow.
I am attempting "coordinated" turns with a mix of yaw and bank maybe out of my sailplane piloting habits I am exaggerating
Do you have ideas as to why this happens more/only with the real birds rather than with the sim?

Cos sims suck. Lol I'm kidding I use them to get muscle memory down for new tricks. But they are pretty bad beyond that in my opinion.

It's what Snow said - throttle control. No secret or trick behind it. Just keep practicing sharp turns around trees and poles at speed until you get it right. That's really all there is to it.

Thank you mr. Samurai
So as I turn around I should strive to bring the throttle down and as soon as I am heading on the new tack re-power it to build the momentum in the new direction?

You learn fast, grasshopper.  

Thank you

I didn't want to get into the nitty gritty of pitch and thrust vectoring when turning because I didn't want to just confuse you more, but I just remember this old Rotor Riot video back when they were a real FPV group of respected pilots giving out great points on cornering. It does not speak to altitude loss specifically but I do think if you take these recommendations to heart, you'll find you will maintain your speed and altitude much better on turns ...

regardless throttlecontroll.i beleive there is also a possibility of high pid values, i or d. probably antigravity or d-min feater? settup throttle value to dispaly in the osd and post it here could probably sort this out.

general rule is; if you get more attitude you like, you should add degrees to your cam angle.
another thing i dont use or understand is the feater about cam angle "where it mixes yaw and roll" not sure about.

The way I look at it theoretically, put your hand out flat like an airplane. Yaw and roll look normal. Now aim your hand straight down like you are crashing that airplane straight into the ground. Yaw and roll are now switched.

Sometimes it's hard to remember for new pilots that the quad axis rotate with itself and don't keep aligned with ground, so ronin example is spot on. Typically when you coordinate a hard turn you end up with less altitude so you have to pitch back a little. I would try a bit more agressive move. If you don't want to risk it go light with pitching back on the turn and you should be ok.

Well I 'm not sure I can make a lot of use of the suggestions of those monsters in the video  Too much differential between their skills and mine.
One thing to clear  up maybe is that (as a certified pilot I do understand thrust vectoring physics quite well  ) what is happening is the opposite of what I'd expect while doing a bank turn, since the lift angling away from vertical should cause less upward force hence sagging in turns, while my problems is that I'm climbing during them.

A big difference from piloting as I did sitting in the cockpit and on FPV goggles is that with the former I knew exactly at all instants what my plane's attitude was, while on goggles I might BELIEVE I'm doing a bank turn and maybe I'm very uncoordinated, flattish???

As per hugnosed bat here's a screenshot of those values which I still am very confused about



for sure I see Anti-gravity there

Next time I fly I'll try to arrange a video with the throttle value and if I can also my fingers on the sticks.

Thanks to all for the good advice.

d-min isnt set to a high value, i-term isnt high aswell. probably you can switch off both for a try but it seems it isnt what cause climbing.
what cam angle do you use? i would go for 45degrees as a try, cam angle does matter a lot.

Ok thanks a lot will try. No idea of the current angle

(27-Oct-2020, 09:43 AM)rjalex Wrote: One thing to clear  up maybe is that (as a certified pilot I do understand thrust vectoring physics quite well  ) what is happening is the opposite of what I'd expect while doing a bank turn, since the lift angling away from vertical should cause less upward force hence sagging in turns, while my problems is that I'm climbing during them.

I have been flying mini-quads for about 2 years.  While I don't consider myself to be particularly skilled at it, I do have the basics down.  I have also wondered why I tend to gain altitude in turns, especially since, as you say, the vertical component of the thrust vector is reduced when the quad is banked away from the horizontal.  As I see it, there are only three possible reasons for the altitude gain.

1. As mentioned, the quad banks by speeding up the outside motors and slowing down the inside motors.  Perhaps these two actions don't entirely balance out, and the total net thrust increases.
   
2. If the turn is not well-coordinated and the quad is skidding outward during the turn, I suppose there could be a small aerodynamic effect from the banked frame skidding sideways.
   
3. The pilot, anticipating the reduced vertical component of the thrust, gets a little bit nervous and unconsciously increases the throttle too much.
   

For myself, I'm betting on #3.  And focused practice does help with that.  If you have a couple of race flags or other landmarks suitably positioned, practice flying a figure-8 around them while working on keeping your altitude constant.