Ritewing Mini Drak is probably the best looking RC flying wing. You might not agree if you want to. It just looks awesome! Geat foam quality, great flying experience. Sure, it's not 100% perfect and I would not mind if Ritewing improved Mini Drak a little, but for sure it is an amazing design!
I have a theory that 7-inch FPV quadcopters fly "below expectations" due to frame resonance, I did not expect, so many pilots agree with it. We had nice talks in comments, I've learned a lot about stiffness and moment of inertia (that you Pierre-Louis). Many of you shared some of their tricks and ideas on how to solve that. Let's start testing some ideas how to fix that!
What happens when multirotor world meets flying wings? Flying ZM250 without arms is born. Today we will take a look at a new example of German Engineering: Flybot Flux Freestyle FPV Flying Wing
Weather like this happens only a few times a year: raising fog, low sun and another layer of clouds… And very little wind. To be honest, when I went to the "airfield" I did not expect to use my Mini Drak at all. The fog was too dense and too low. But then it raised and holes appeared… Awesome…
- Airplane: Ritewing Mini Drak
- HD Camera: RunCam Split Mini 2
Good screwdriver set that will not ruin your budget? Or rather honestly priced screwdrivers set that will not disintegrate after the first usage? That's a tough one. Xiaomi to the rescue? Why not, Xiaomi Mijia Wiha is apparently good enough!
Let's measure power output from Eachine TX805 that is supposed to be up to 800mW. Well, it is not. It matches the specification only at 200mW and 800mW is just not there. But, well, it's only $16 and when used at 200mW or 500mW it works quite well.
RF power meter can be purchased for really cheap. Surprisingly, it is a pretty decent hardware too…
I love Team BlackSheep Unify Pro series of video transmitters. But they are bloody expensive. $50 for an HV version is way too much in my opinion. Still, I own several of those. Whey on Banggood I've found a presale of Eachine TX805 VTX with SmartAudio for $16, I could not resist and I've ordered a couple of them. This is what came out of it:
I will keep it short: drones are not designed for a long flight. Sure, you can put bigger props, bigger batteries and make it lighter, but comparing to even simplest airplanes, there is nothing to compare.
The conclusion is: try airplanes. They are cheap, simple, easy to fly with modern flight controllers and are much more efficient than drones!
The second generation of my 3D printed coaxial dualcopter is here! And this time it works almost as I wanted.
Just watch the video
On the more technical details:
- It runs INAV 2.0 with a custom mixer
- Thrust and yaw control is provided by 2 counter rotating propellers
- Upper motor is 2205 2300KV with 5×4.5×3 propeller rotation in CW direction
- Lower motor is 2205 2600KV with 4×4.5×3 propellers rotating CCW
- Control surfaces are rotated 45 degrees from the long axis to fit servos
flight controller is also 45 degrees rotated
- Any 9g servos will do
- runs on the 4S battery that has to be on the top of the device
- All 3D printed parts can be downloaded from Thingiverse
- 2205 2300KV brushless motor
- 2205 2600KV brushless motor (2300 also will do but will have less yaw authority)
- 5×54.5×3 propeller
- 4×4.5×3 propeller
- 2 14mm carbon pipes (12mm internal diameter), each around 270mm long
- 2 2g servos
- 3M bolts to secure the motors
- good adhesive tape to make control surface hinges
- hot glue
- flight controller compatible with INAV
- radio receiver
It's time to start thinking about INAV 2.1. No, I will not give you any timeline, but I can point two features that are very likely to go into the upcoming INAV release.
The first one is Braking Mode for multirotors. I already made a video about it, so you might want to watch it first. Right now there is an open test phase for this feature made as part of my fork of INAV. If you want to test Braking Mode, please visit this page and download the hex file for your board.
On top of that, it's very probable that DSHOT will finally make it to INAV too! DigitalEntity started to tackle with the DSHOT implementation so yes, this is finally happening for INAV!