Gravel 2.5" pusher drone

I design this frame/drone to do hard flies in busy places like thick forests. I used 3mm thick plates for the main plate, so it can survive hard crashes. Pusher configuration with bottom mounted battery, which I prefer especially on smaller drones, feels smoother and more stable also the o3 unit is center mounted, so the CG is very close to the center. I use three different batteries, 550, 650, 850mAh 4s, the flight times usuall 3-6 minutes depending on how hard it pushed. It's a but heavy but I like the extra intertia, it reminds me to heavier drones, similar to tiny trainer. 

https://www.instagram.com/butcherengineering/