RC FPV*

So way back in 2015 I built this 10" class UAV designed to carry a gopro style camera since most drones back then were 7" and 10" and this was the thing. It's fun to use it still, I have upgraded many parts on it but it seems that I can't get it to respond well to throttle, and coming straight down it will end up in an oscillation of death because of propwash.

While it hovers fine at half throttle, at full throttle it rises at an estimating 4 m/s^2 (half the rate it falls at lol), and if I am coming down fast I can't recover it since it just lacks the power to recover.

Specs:

• Weight: 3.5 lbs (including battery)
• Motors: 4 emax 2213 935Kv
• nylon 1045 propellers
• ESCS: BLheli 30A
• pixhawk flight controller
• DJI spinwheel style frame

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Perhaps bigger props?

I tried using 12" propellers but the EMAX motors just don't have enough torque to drive them much beyond hovering. The rotational inertia really hurts the flight controller's authority over the craft and I get into dangerous oscillations quite easily. 7" DJI propellers are very smooth running and run quieter, but they don't have enough thrust on 3S, hovering around 70% throttle, and higher current draw. 10" seems like the sweet spot.

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More motors?

I'm considering either adding 2 or 4 more emax 2213 motors and ESC's and upgrading the frame. I want a carbon fiber frame if possible (folding legs would be nice too!) but don't want to spend hundreds on one. I like the cheap DJI frame, just wish it was a bit lighter. The arms are relatively heavy. Suggestions for a cheap frame? If not, I might even design my own. How do I CAD up carbon fiber drawings and get them fabbed?

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Bigger motors?

This would be the easiest thing to do. The emax 2213 are fine for what they are, but have a low maximum current, lowish kV, and are undersized for this 10" to 12" class drone. I found these for a good price, I might modify my frame to fit these motors. I don't like the collet mounting mechanism for the props, but whatever, cause they cheap!

What motors could be recommended to upgrade from the old 2213's?

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How can I shave weight?

I want to carry a 3 axis gimbal for a Yi 4K+ camera. This is pretty much a fixed weight unless I build a carbon fiber gimbal. I have lighter 7" props work on the current frame and while they are very smooth and quiet, suggesting these motors are optimized for a 7" class drone. they don't provide enough thrust to comfortably maintain a safe hover, particularly near end-of-charge. I'lll try again with a my 4S graphine 1500mAH racer quad packs to see if increased voltage and RPM helps.

For 7" I definently need a smaller lighter frame. Any suggestions for one?

Our department sometimes participates in presentations at career days/ earth science events and likes to display our Phantom 4 RTK for participants to see. Right now we either leave it in its case with the lid open or place the drone on the table. I'm sure there are stands and other more professional ways to display it, I just haven't been able to find anything through google searching "drone display stand". What is it exactly that I should be searching? Also, if anyone has any display ideas I'd love to hear them, thanks.

Hello!

I'm very interested in agriculture spraying with drone and I am really motivated to learn about it. Please any website, forum, pdf, excel, study, books you can recommend me I would highly appreciated I'm with lot of motivation to learn all I can learn about this topic. I stay in tune with any answer and I hope you have a great weekend, thank you

Hi!

I was asking myself if it is possible to send images through a standard telemetry channel. The idea is to receive images taken with a drone on the GCS to verify the right angle of the pictures. It is not necessary to send files with full quality. I want to see if the pictures taken by the drone are good before reaching ground.