Self milled from 2mm thick carbon fiber sheet.
Motor: RCX H1306 3200KV Micro Outrunner Brushless Motor (Performance Racing)
Motors, ESCs, PDB, power connector total137gr – 35gr = 102gr
First flights without FPV, weight with battery 264gr:
Final setup with FPV capability, 230gr without battery and 302gr with 950mAh 3S battery. The FPV setup (camera + TX) added 32gr weight):
Really hard. Either the carbon fiber resonates or some motors are unbalanced. However with these PID values I got somehow decent full throttle:
I used betaflight with these new filters:
set gyro_cut_hz = 40
set pterm_cut_hz = 30
set dterm_cut_hz = 12
.. But returned back to defaults.
This is my version of a carbon 250 quad. It’s based on Hammer v 3.0 plans (big thanks!) but I have made some modifications that suit my taste.
The carbon pieces are self milled on 1.1mm carbide tool. 16.200rpm, 0.5mm layer, 210mm/min.
Each arm weights 10.1gr. Thickness 2.91mm. Modified from Hammer arms; removed that suddenly narrowing shape (weak point) and made it “evenly breakable”. They are still 100% compatible with the original Hammer design.
The two identical base body plates weighted 23,8gr each. They are 2mm thick carbon fiber.
Motivational assembly! 100gr total at this point.
DXF’s of arms and base body
Spacers (stl) and upper deck (dxf)