Help! Power loss

[TerryG]

I recently got my Simple Cub flying with a FT 2212/1050 kV motor, Tattu 3s/45c/1300 mAh battery, & an FT 40 amp ESC. When throttle is advanced beyond 50% (as in a take-off), motor slows down and "sags." At 75-80% throttle, motor speeds up again. Whenever throttle passes through the 50-75% range, power goes down/RPM drops. Too soon in the flight for over-heated ESC. What's happening? How can this be corrected?

 

[M.Peanut]

Have you tried calibrating the ESC? Also make sure your prop nut is nice and tight.

 

[Mr NCT]

To calibrate the ESC:

1. Remove your prop
2. turn the Xmitter on
3. bring the left stick to full throttle
4. plug the battery into the ESC
5. wait for the beep
6. lower the left stick to minimum throttle
7. wait for the beeps

Done

 

[LitterBug]

What Brand and model of transmitter and reciever are you using?

 

[Merv]

... When throttle is advanced beyond 50% (as in a take-off), motor slows down and "sags." At 75-80% throttle, motor speeds up again. Whenever throttle passes through the 50-75% range, power goes down/RPM drops....

Make sure the Tx is airplane mode. What you are describing sounds like what happens when the Tx is helli mode.

 

[Shurik-1960]

For Beginners, it's time to make a separate section with typical questions and answers. If you read all the forum pages, then 60% of them will have the same questions and answers.

 

[TerryG]

To calibrate the ESC:

1. Remove your prop
2. turn the Xmitter on
3. bring the left stick to full throttle
4. plug the battery into the ESC
5. wait for the beep
6. lower the left stick to minimum throttle
7. wait for the beeps

Done

To calibrate the ESC:

1. Remove your prop
2. turn the Xmitter on
3. bring the left stick to full throttle
4. plug the battery into the ESC
5. wait for the beep
6. lower the left stick to minimum throttle
7. wait for the beeps

Done

Looks like it worked! Field test next. Thanks!

 

[TerryG]

Have you tried calibrating the ESC? Also make sure your prop nut is nice and tight.

Re-calibrating did the trick. Thanks.

 

[M.Peanut]

Glad to hear it. Time to get airborne