My test stand.

JCP

I mostly just wanted to put everything together a turn it on to make sure I did everything right before putting it all in a plane. A few seconds is all I need.

Thanks for the pictures.

Static current at the desired RPM setpoint typically consumes more than 4/3 of the average flying current; sometimes more.

Regards,
  Dean Pappas

Hello Chris,

It is difficult to say, but usually it is motor which burns first. However we have experience with situation when one component takes another, and then whe you exchange that "bad" then it will take also another (right Keith? :- ))) )

Overloaded motor (improperly selected motor for prop and power) can heat so much that magnets will loose strength. Motor will need even more current to keep RPM and it will go even quicker. Burned winding will confuse ESC and it will try commutate in improper time and that can kill also ESC. So they usually go together. And burned ESC can short also battery which can make nice firework 

But it could be caused also by deffective component - short between windings in motor coil can also heat motor or make erros in commutation, it can kill them also.

And defective transistor in ESC can do the same.

Those two last probles can be checked when motor is tested on test stand WITHOUT PROP. Motor running at full power (not with ESC with governor) without load should take defined "no load current" which should be stated in motor specifications. Weak magnes, short between coils or deffective ESC will make that current signifficantly higher. Do not use such components.

Thanks for the response Igor. I suspect it may have been a defective ESC. The motor is an E-Flite 25, with an APC 12 x 6 pusher, so the motor should have no difficulty at all turning that prop.  I have turned much larger with the same motor.  The ESC was an Ice 50, so again there should not have been any issues with respect to load being drawn.  The defective transistor seems the most plausible theory right now.

I will go over the installation with a fine toothed comb before we risk another ESC.  If I remember correctly, the ESC was mounted fairly tight up against the fuselage, so I will recommend the owner stands it off a bit next time so that cooling air can reach both sides of the ESC!

Cheers 

How so Randy?  Both Alan and I used the Ice Lite 50's in our original electric ships with no issues (once Will Hubin sorted out my software version issue).

Hi all
This allows me to kill two birds with one shot.
This test stand I made up about 4 years ago. I can set up any motor
by making mounts that fits a universal pattern. There is the Watts up meter
What you see now is Igor's ESC/Timer setup (Just came in the other day)
I only run it long enough in this case to check rotation and delay. Thanks Igor everything works
fine. Now I get to put it in my Infinity and try it out this weekend. 

Hi all
This allows me to kill two birds with one shot.
This test stand I made up about 4 years ago. I can set up any motor
by making mounts that fits a universal pattern. There is the Watts up meter
What you see now is Igor's ESC/Timer setup (Just came in the other day)
I only run it long enough in this case to check rotation and delay. Thanks Igor everything works
fine. Now I get to put it in my Infinity and try it out this weekend. 

What is that ribbon you have taped to the bench top for?  I also saw it on the bottom of your plane in the other thread??

What is that ribbon you have taped to the bench top for?  I also saw it on the bottom of your plane in the other thread??

Doug
The ribbons are the wires for the timer/accelerometer The ribbon wasn't taped to the bench it was just attached as part of the system to run briefly mostly to make sure the rotation and delay is correct.