Motor Test Rig

[Burkeomatic]

Shockingly, it took me quite a while to find a test rig that tickled my fancy. 

www.thingiverse.com/thing:2902341/files

What caused me to do this? Well, I made a thread about it on RCG. 


www.rcgroups.com/forums/showthread.php?4303447-Is-Ecalc-off-here

The long and short is, if I punch the information about the set up I plan to or hope to use, eCalc says that my motor will overheat in a fiery death at half of it's rated capacity. 

But that doesn't make sense to me. I know stuff gets fluffed up and over rated, but it doesn't make sense to me that the motor would be extremely over heated at 45% of it's capacity, but I could be wrong. 

So one dude even goes to say it will only be safe to around 200-300w. 

Ok, well now this really doesn't add up. So either they are wise beyond their years, and this motor is overrated by an extremely large amount, or they are using old numbers based on old stuff and conventional wisdom. 

[droneflyer200]

that looks very cool I dont have a printer but I bet I can make one out of wood!

[Burkeomatic]

Well, the truth lies somewhere in between. 

The motor does fine at 60% and about 300 watts, no over heating. 

Max throttle, after about a minute (around 500 watts) it heats up in about a minute. Of course, this probably wouldn't happen in the air with the prop unloaded, so my guesstimate was right. 

So basically I did find a place where ecalc was wrong, and they were kind of right on RCG too, actually, they were closer to being right than EMax was. That motor would only put out 1100 watts once. 

However, at 60% throttle, it was producing over 1000g of thrust on a 7x6 prop, and at max it was approaching 2000g, so this is a great set up. Although this is a $20 motor, which is about $13 more than I normally pay lol.