Sky

Introuduction:

The first rs90 was too beat up to fly, so I decided to rebuild it with slightly different components.

Components (~$90):

• 3d printed PETG frame
• M2 x 10mm nylon standoffs x14
• M2 6mm screws x28
• hubsan tri props
• frsky micro D8 receiver
• racerstar 6A 2in1 ESC x2
• racerstar BR1103 8000kv motors x4
• micro F4 flight controller
• FPV camera & VTX (optional)

Conclusion:

The major component changes were higher kv motors and a more modern flight controller. As for the frame, I initially went with the largest lower plate for increased durability. This increased the overall weight of the quad to 60g without a battery. It flew very similar to the first even with the increased kv motors, but after a couple of crashes, I saw that with the stiffer bottom plate, the top plate started breaking instead. This made me realize that the issue was structural. At around the same time, I also acquired an armattan bumper quad. This thing was like a tank - taking crash after crash without a scratch. After thinking about it a bit and looking at the areas that used to break the most, I realized that the frame can be made a lot stronger with the use of foam much like the bumper.

I ended up switching back to the medium plate and added foam to the sides instead the help brace it upon impact such that the top and bottom plates act as one larger unit. Overall, the weight actually went down to 55g without a battery. This leaves room for an AIO camera to be added later while keeping the weight to 60g.