A math problem

[dloh]

If my motor is drawing 18A and I am using a 2200 mAh 3S Lipo, how long will my flight time be? How do you calculate that?

[Pang]

If my motor is drawing 18A and I am using a 2200 mAh 3S Lipo, how long will my flight time be? How do you calculate that?

assuming your motor average amp draw is 18A, to get your flight time,

(2.2/18) x 60mins = 7.333mins

to protect lipos we used up to 80% of capacity so its better to be

(2.2*0.8)/18 x 60mins = 5.866mins

[Abdul]

Motor Calculator

If my motor is drawing 18A and I am using a 2200 mAh 3S Lipo, how long will my flight time be? How do you calculate that?

Use motor calculator : - Link

[dloh]

wow..interesting

assuming your motor average amp draw is 18A, to get your flight time,

(2.2/18) x 60mins = 7.333mins

to protect lipos we used up to 80% of capacity so its better to be

(2.2*0.8)/18 x 60mins = 5.866mins

Good thing this problem didnt come out during my A level 20 yrs ago or sure fail one

[dloh]

cool

Use motor calculator : - Link

Thanks for the link,...almost like electrical engineering 101

[Babylon5]

If my motor is drawing 18A and I am using a 2200 mAh 3S Lipo, how long will my flight time be? How do you calculate that?

When the plane is in flight, depending on the airframe and flying speed , the air passes over the propeller will unload the motor.Meaning if you motor draws 18 amps at stationary , in flight it will draw much lower current between 10 to 30 % lower depending of the aircraft drag factor.
Therefore, a low drag airframe will give you some degree of extra flying time.
So calculating the duration of flight is not so simple.