This build was my attempt at making a long-range cruiser that's not too heavy, so that I can potentially try to fly a 6s1p Li-ion custom pack without drawing too much current. I found the Yeti frame by FridayFPV which comes in at 96g which is super light for a 6" non-racing frame! It should be able to carry a GoPro Hero 7 (which I enabled by designing custom TPU parts), and carry any size or shape batteries which is why I wanted a bottom mount style.
Components
- BrainFPV Radix as flight controller: it has a nice graphical OSD to display gyro noise and features a high-quality gyro chip
- T-Motor F55A Pro ESC: according to some tests I saw, this ESC is low-noise and will provide waaayyyy enough headroom for current draw
- MB Primo 2208 motors: smooth and quite cheap, these are really enjoyed by long-range enthusiasts
- Runcam Racer (first version): camera with a very nice dynamic range, not going for realism here, the picture looks kinda weird but you see EVERYTHING
- TBS Unify Pro MMCX: first time actually using a MMCX vTX, came in handy when assembling the quad because I could easily pop off the pigtail to remove the "canopy"
- Crossfire Diversity Nano RX: the new receiver allows to use 2 antennas, thus cancelling nulls in the reception pattern and also can use a backup battery to run after the main battery is ejected
- 35mm GPS board: I found the small 18x18mm boards tend to lose reception over time, and become quite useless after a few months. The bigger ones provide quick fixes and seem to work better
- Vifly Finder 2: buzzer with its own battery so that it can still beep in case the main battery is ejected. And it's loud.
Build
Here are some pics of the build, it's pretty tight but you can take advantage of the height to make a 4-layers stack.
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 Fitted a capacitor as an afterthought because I'm gonna use 6s |
 Printed some custom parts to angle the two antennas 90 degrees to each other |
 waiting for motors to be delivered... |
 motors are here! |
It's done! I won't lie it was not easy cramming everything into that stack, but I'm super happy with the result!
Finished
And here are the not-so-glamour shots! I'm pretty happy with the weight, it would have been hard to make it much lighter without compromising on motor power or features.
Maiden Flight
Hope you liked it!
Photos
Part List
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nice build and good video.
can you post the 3dmount of gopro and gps(are they together?)?
thanks a lot man
There you go! https://www.dropbox.com/s/6hl9tk41d2l2uai/GoproMountYeti.zip?dl=0 The gopro part only needs support for that bottom part that goes into the standoff, and it's the same part for both 20 and 30 degrees. The part that holds the GPS doesn't need support and is different depending on the angle. Print in the default orientation of the STL. Enjoy!
Nice build. Do you think these antenna positions are best for long range? What distance are you getting? Happy flying.
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how to feed the vtx?
do you use lipo source or fc source ?
thanks a lot
I use the 5V on the FC (coming from the ESC regulator) but it's not recommended. Apparently the traces on the Radix are not made to support that much current, but I never had an issue.