Help! Will my plane be underpowered? (CUB)

arjun21122006

New member
I will be stratch building my first plane the simple cub...
I have a 2212 8T 1800kv motor with 2200mah 3S battery...
I am planning on using 8045 or 1045 propellor with a 3 ch config...
Please tell whether this much power is enough or I need to make other plane
 

Tench745

Master member
I ran the approximate specs of your setup through this online motor calculator: https://rcplanes.online/calc_motor.htm I used a Scorpion 2212-1850kv motor for the baseline
With that 1850kv motor on 3s running an 8x4.5 prop it will draw about 24 amps, for 250 watts of power. Look at the specs for both your motor and ESC make sure they can handle these numbers!
The plans say the Simple Cub should weigh about 18oz ready to fly, and this motor/prop combo can deliver about 36oz of thrust. So that means this setup would have 222watts/pound and a 2:1 thrust to weight ratio which means it could easily climb vertically. This is 3D-aerobatics territory.
If you're a beginner and set on using this motor and an 8x4.5 prop I would recommend running a 2s battery instead of a 3s.

The 10x4.5 prop would draw about 38 amps for 380 watts of power which is probably not going to happen with a 2212 size motor.
 

arjun21122006

New member
I ran the approximate specs of your setup through this online motor calculator: https://rcplanes.online/calc_motor.htm I used a Scorpion 2212-1850kv motor for the baseline
With that 1850kv motor on 3s running an 8x4.5 prop it will draw about 24 amps, for 250 watts of power. Look at the specs for both your motor and ESC make sure they can handle these numbers!
The plans say the Simple Cub should weigh about 18oz ready to fly, and this motor/prop combo can deliver about 36oz of thrust. So that means this setup would have 222watts/pound and a 2:1 thrust to weight ratio which means it could easily climb vertically. This is 3D-aerobatics territory.
If you're a beginner and set on using this motor and an 8x4.5 prop I would recommend running a 2s battery instead of a 3s.

The 10x4.5 prop would draw about 38 amps for 380 watts of power which is probably not going to happen with a 2212 size motor.
Ok then I will be using 3s battery with 8045 prop since 2s batteries are not readily available in my area & my esc can handle 30A