Flite test Power pack A overheating problems

[Shampooinghippo5]

I Have the FT power Pack A running on the mighty mini p51 running on a 3s 850mah, It was flying great until the motor stopped mid-flight about 4-5 minutes in on about 60% throttle. I was able to land it and immediately I realized the motor was smoking, I immediately unplugged the battery and power pod and let it cool, I tried trouble shooting but I do not know what the problem is. Can someone please help?

 

[Merv]

...Can someone please help?

What prop were you using? How was it installed? Were the numbers facing the direction of travel? Or was it back wards, the numbers facing the rear of the plane?

 

[Shampooinghippo5]

What prop were you using? How was it installed? Were the numbers facing the direction of travel? Or was it back wards, the numbers facing the rear of the plane?

I was using a three bladed 6x4.5 propeller that was on right and facing the correct direction of travel.

 

[Merv]

I was using a three bladed 6x4.5 ...

I don't have much experience with the A.
May someone else knows if the 3 blade prop is too much on 3S.

 

[Foamforce]

I was using a three bladed 6x4.5 propeller that was on right and facing the correct direction of travel.

The 2 blade 6x4.5 is the recommended prop. The rule of thumb is to drop one prop size when going from two blade to three, so it’s fairly likely that you burned out the motor. There’s a slight possibility that there was a difference cause though, such as if the motor was rubbing against the firewall.

If you’re going to use a non-recommended prop for a motor, it’s best to measure the amps to make sure it doesn’t exceed the motor’s rating. If you can’t test the amps, then do a short flight and touch the bell of the motor immediately after you land and see if it’s hot. Warm is ok, but if you can’t hold it comfortably in your hands, then it’s way too hot. Also check the ESC the same way.

 

[Shampooinghippo5]

The 2 blade 6x4.5 is the recommended prop. The rule of thumb is to drop one prop size when going from two blade to three, so it’s fairly likely that you burned out the motor. There’s a slight possibility that there was a difference cause though, such as if the motor was rubbing against the firewall.

If you’re going to use a non-recommended prop for a motor, it’s best to measure the amps to make sure it doesn’t exceed the motor’s rating. If you can’t test the amps, then do a short flight and touch the bell of the motor immediately after you land and see if it’s hot. Warm is ok, but if you can’t hold it comfortably in your hands, then it’s way too hot. Also check the ESC the same way.

Thank you, I suspected this muhht have been an issue as I have run a smaller 4 blade propeller before and the motor was fine. I snapped the original propellers on a very rough landing so I had 3d printed the 3 blade ones to the same size as I live far away from any hobby shop and I wanted to get flying before it gets too cold I will test out a 3d printed version of the 6x4.5 and see how that works if not I will just make a special trip to get the proper propeller.

 

[Foamforce]

Oh yeah, a 3d printed one may also be heavier and have more drag, so it might pull more amps. Whatever you print, just see if the motor or ESC is running hot after 30 seconds. Good luck!

 

[Shampooinghippo5]

Oh yeah, a 3d printed one may also be heavier and have more drag, so it might pull more amps. Whatever you print, just see if the motor or ESC is running hot after 30 seconds. Good luck!

Too late as I burnt out the motor, Thanks when I get a new motor I will test this out

 

[Merv]

...I had 3d printed the 3 blade ones...

I would be very cautious using a 3D printed prop. Don't let anyone stand in the ark of the prop. A 3D printed prop may fly apart and a fragment hit someone.

 

[Shampooinghippo5]

I would be very cautious using a 3D printed prop. Don't let anyone stand in the ark of the prop. A 3D printed prop may fly apart and a fragment hit someone.

I fly in my own acreage far away from anyone i am aware of the risks.