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First plane! (AtomRC Dolphin PnP)
#16
give it a try on 5 or 6inch, i believe you wont loose much efficiency but safety and better performance over the whole rpms either
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#17
(07-Jul-2023, 08:51 AM)hugnosed_bat Wrote: give it a try on 5 or 6inch, i believe you wont loose much efficiency but safety and better performance over the whole rpms either

I had considered it, but I already put the new 7 inch prop on and I really don't want to wait another week for different ones to show up. All I've got outside of 7 inch is a beat up prop from the Nazgul I sold and 3 inch props for my Micro Apex.
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#18
should be biblades or folding on a wing for my taste.

decrease the startuppower and enable demag compensation would be my route, if i allready burned one motor than
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#19
(07-Jul-2023, 04:01 PM)hugnosed_bat Wrote: should be biblades or folding on a wing for my taste.

decrease the startuppower and enable demag compensation would be my route, if i allready burned one motor than

I am running a bi-blade. As for the motor, it's considerably more capable than the last. If I blow another one up, I'll take your advice. Honestly, I think I was just over driving the first motor with my launches. The new launch parameters have it launching around 75% output. I'm also thinking I'll just activate loiter mode once it's in the clear.
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#20
So far things have been pretty good with the new motor. No signs of stress, and even with the motor cap it'll hit a nice 100mph (160kph) when I want it to. Next on the chopping block has been tuning and figuring out this weird behavior when sharply pitching upwards. It will bounce quite a bit, then the left wing dips. It's as though one of the control surfaces is lagging behind or something.
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#21
A few things to Autotune in v6:

- make sure that you run AT when in ACRO mode and NOT in manual (I couldn't see your flying mode in the vid)
- when you do AT, do one axis after the other. fly a long straight, activate AT and then start rolling. it's important that you give full deflection on your stick and not only 50% or so. it doesan't have to be fast but all the way. try not to tune all axis at once. then switch off AT and turn around. AT on and continue with the same/next axis.
- the more lets say rolls you do, the better the result. at least 20 movements are required for a decent result. the more the better
- INAV 6 only tunes FF and Rates. no longer PID. v3 was the only version that tuned it all. since then the PID's have been removed
- check your settings afterwards. if you find FF >100 then increase the throw mechanically
- If you have a plane with a large speed envelope it is difficult to find the right PID's for flying slowly and at high speed. if too high, you'll get oscillation when speeding. too low you don't have any stabilization when flying slowly. you have to find the middle ground which is not always easy. to counter that there is the TPA settings but that does not really work for planes/wings so don't touch/activate that. It's better to use profiles. you have 3 profiles that you can use for a specific speed range with the PIDFF accordingly. a bit complicated to setup and tune properly. but once accomplished it will give you the best result.

the twichyness of your plane is probably too much FF and too high I-term. reduce both by 10-15% and fly again.

a diff file always helps for troubleshooting Smile good luck!

[-] The following 1 user Likes StuweFPV's post:
  • Suros
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#22
This is all very useful information. Been finding it rather difficult to find certain info for planes, so I'll take all the obscure or less discussed tips I can get!
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#23
I guess this is why we use the forum. INAV documentation is really messy. you'll find bits and pieces everywhere but often outdated and incomplete. i guess the best resource is still github especially with all the commands that have a description. https://github.com/iNavFlight/inav/blob/...ettings.md

we should start a dedicated wings/planes INAV thread Smile

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#24
(09-Sep-2023, 07:41 PM)StuweFPV Wrote: I guess this is why we use the forum. INAV documentation is really messy. you'll find bits and pieces everywhere but often outdated and incomplete. i guess the best resource is still github especially with all the commands that have a description. https://github.com/iNavFlight/inav/blob/...ettings.md

we should start a dedicated wings/planes INAV thread Smile

For some reason I thought one was already up, but perhaps the topic was more specific than that.
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#25
(11-Jun-2023, 10:34 AM)Suros Wrote: The manual was actually quite sparce. Most of the worthwhile info I got came from Painless360 on YouTube. While there was a CG marker, I used it incorrectly by trying to place the plane on a flat surface and then trying to balance it by moving the battery around. Turns out I was supposed to put the little dots on my fingertips. So what I thought was still nose heavy was actually extremely tail heavy. Managed to collect around 90% of the foam, but some of it just couldn't be found in the tall grass surrounding the one and only solid dirt patch it landed in.

   The CG is probably the most critical setting on a fixed wing.
  A golden rule for CG is,
 It’s always better to be too nose heavy and never attempt to fly a tail heavy plane.


   With your fingers on CG the nose should dip down about 20-30 degrees but not pitch over.
 The following picture is good but I suggest the nose should be dipping down another 10 degrees if not 20 degrees starting.
  
  


  [Image: RxJ4yC0l.jpg]
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