Finally got around to building the RS90 yesterday, been thinking about doing it for over a year. I’ve watched @rschoi_75’s videos of his RS90 many times can’t believe he was rocking this in 2015! Way ahead of time! (btw, he was also the first I have seen put an FPV camera on Inductrix way before Tinywhoop existed. I was like meh… 2 minutes of flight time… I’ll stick to the Nano QX)
But yes, RS90 is an old design and micro brushless whoop isn’t special anymore nowadays, but the plus side of that is the parts have become a lot better and cheaper compared to 2015. And most of all, I built this completely from spare parts I had laying around which makes it feel extra satisfying!
- Piko BLX (clone)
- Racerstar 4in1 ESC
- Racerstar 1103 10000kv
- Frsky XM receiver
- Some old school 200mw VTX I’ve had for over a year, let me find that thing, ah here it is:
It needs a filtered power supply so I used the filtered VTX output of the Piko BLX coupled with a 5v polulu
Would be easier to use a VTX03 but this was more fun as I didn’t have any other use for this vtx. I put a 4 blade clover on there for looks and because I have a whole bunch of those from replacing AIO with dipoles. Again dipole would be easier and lighter but I wanted something different.
- And this is connected with a very long signal wire that runs all the way to a cheap ‘banggood’ 600 tvl
Have it coming in at 88 grams including the 2S 350 battery.
- First used Racerstar 2035 4 blade props (trimmed down a mm or so) but these are so damn inefficient I got 2:30 flight time and beeper beeping like constantly. I’m now using drilled out HM830 paper airplane props and it’s much better, they fit perfectly and get around 3 minutes of flying, still more than enough thrust for indoors. I was hoping to get less noise as well, but it still screams aggressively! ah well
I did print the frame in ABS, it’s recommended to use Taulman 910 nylon. Whilst I did get a spool for this build about half a year ago, I couldn’t get it to print well, probably too much moisture and I need to try the oven dry approach but it’s a hassle and I haven’t taken the time yet. It feels pretty tough as is, should be enough for relaxed whooping style of flying at least. Time will tell, I hope it doesn’t break soon because I’m loving it!