drone frame sizes determines the diameter of the propeller, calculate the straight line distance between two adjacent axes, which is the distance of the AB line in the figure, and the distance of the AB line is just the maximum diameter of the propeller.
drone frame sizes
It can be seen that the wheelbase is a four-axis rack with 450mm.
1 inch = 25.4mm
318.20 / 25.4 = 12.5 inches
Therefore, the maximum propeller diameter obtained is 12.5 inches.
The actual propeller diameter cannot be exactly equal to this value, otherwise the two propellers will fight.
Most of the propeller diameter specifications are integers. It can be known that the maximum propeller diameter supported by this rack can be selected to 12 inches.
If you want to diy drone, recommand a drone diy web, droneassemble.com, you will find different drone frame size for multi-rotor, fixed-wing and VTOL.
KIT frame material: carbon fiber Composites
Frame Weight: 2.68kg
Total Weight: 5.5kg(without battery)
Max Take-off Weight: 12kg
Max Payload: 6.5kg(including battery)
Max Flight Time: 2.5 hours
Max Speed: 100km/h
Contact: Fly Dragon Drone Tech.
Email: export at dronefromchina.com
Add: NO. 9 Dayu Road PiDu distric, ChengDu 611730, China