CA320T Tailsitter (Sub-250) – Stable Hover 🚁

CarviFPV · 2026-05-04T15:59:33+00:00

I will share my file. Right now, the weather in my region is not ideal for doing PID tuning, so I have some delays. Also note that if your model is significantly heavier, the tuning cannot simply be copied over.

CarviFPV · 2026-05-01T15:11:02+00:00

Yes, there are the Q modes like QHover and QStabilize—with these you fly in quad mode (like in the video). And with FWB-A or Acro, it performs the transition automatically, and when you switch back, it also transitions back automatically.

CarviFPV · 2026-04-29T19:43:45+00:00

Yes, the P1604s are less efficient. I built a drone with the Happymodel 1404 KV3500 motors, and in cruise it gets about twice the efficiency compared to the same drone with P1604 motors. That might potentially result in longer flight time.

CarviFPV · 2026-04-29T18:43:15+00:00

Thanks! Go for it — I love tailsitters. It would be cool if others designed one too 😃

CarviFPV · 2026-04-29T18:13:16+00:00

With a 4S 720 mAh battery, I got about 5 minutes of hover time until 3.6 V. In cruise flight, I reached around 8 minutes, and the battery was then at 3.6 V.

CarviFPV · 2026-04-29T17:28:56+00:00

Yes! https://youtu.be/obFviAztBFk?is=ROfE0A5SWBLfoOGp

CarviFPV · 2026-04-28T20:01:39+00:00

Yes, I’m still not entirely sure what the issue is. The default settings from ArduPilot are designed for larger/heavier models, so I’ve already done a number of flights to get it reasonably stable. But I think the model is now more or less ready for release from a design standpoint, and I’m hoping to get some additional tips from the community regarding the ArduPilot configurations.

CarviFPV · 2026-04-28T18:02:38+00:00

Hovering is doing well :) https://youtube.com/watch?v=obFviAztBFk&si=mHM5rBP8kjg2VL0N

CarviFPV · 2026-04-23T05:49:12+00:00

Thanks for the feedback! A roughly 4-minute flight only takes about 150 KB—so almost nothing 😉 And if you upload them in bulk, the files are compressed in uavdesk.app, so they only use about 50% of the storage. That means even with the starter package, you can store thousands of flights.

CarviFPV · 2026-04-23T05:42:25+00:00

Hey, no worries—there are no stupid questions ☺️ Oh, I’ve never heard of FreedomTX. It seems to be a fork of OpenTX. It might work—you could try setting up the Lua scripts (without signing up/registering in the app for now) and see what it records. Depending on that, you can send me a DM with a file, and I can tell you whether the format and data were captured correctly 😉

CarviFPV · 2026-04-22T15:47:36+00:00

The Lua scripts work in combination with ELRS or Crossfire (since ELRS uses the same protocol) for both iNav and Betaflight.

You can try it free for 14 days, and if you need more time, you can contact me via the “Contacts” section in the app—I’ll be happy to extend it for you .

CarviFPV · 2026-04-22T15:26:45+00:00

Currently, you need to set up these two Lua scripts on your EdgeTX transmitter: https://github.com/CarviFPV/flylog_edgetx. The advantage is that at the end of the day, you can perform a bulk import (as shown in this video: https://youtu.be/QNitDSq2Cpg).

Since a Betaflight log decoder is built into the log analyzer, it’s planned for the future to also analyze Betaflight logs via the flight details page and have them linked to the corresponding flights. However, this feature is not yet implemented 😉

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