Guys at The Short Grayon Designs have created excellent frame that they call Doinker. It is a 82mm ducted frame for small brushless motors and 1.9" propellers. Ideal for riding larger indoor spaces without fear of cutting interior with the props. Frame is Licensed under Creative Commons and is available for everyone to download and print. We provide a 3D printing service for the frame. 

What components needed?

Motors

• DYS BE1104 - 6000kv / 6500kv / 7500kv
• Racerstar 1103 - 8000kv

Propellers

• FuriousFPV 1935 4blade

ESCs

• Furious Silky 20A 2-4S 2-in-1 Blheli_S
• Sunrise 10A 2-3S 4-in-1 Blheli_S
• Sunrise 6A 1-2S 4-in-1 Blheli_S
• Littleblee 20A 2-4S
• Kiss 18A 2-4S
• any other lightweight & fast...

Flight controller

• FuriousFPV Piko BLX F3
• any other with 20x20mm

Camera & VTX

• Eachine MC02
• Eachine TX02
• FX798T

Radio RX

• FuriousFPV Micro RX with s-bus
• Flysky FS-A8S RX with i-bus / s-bus

Battery

• Nanotech 2S 350mah 65C
• Nanotech 3S 450mah 65C
• Bolt 2S 500mah 65C
• Bolt 3S 500mah 65C