Help! Need help with the ID of this Motor

[Mr Man]

Need help with this one, it has an outer diameter of 3525mm Thank You!

 

[Mr Man]

Anyone?

 

[Mr Man]

maybe an outer diameter of 3626.

 

[Mr Man]

Need to know if I can run it off of 4s.

 

[gk4rpv]

Need to know if I can run it off of 4s.

I've heard of a device that will tell you the kv rating. Once you know that you can guestimate cell coun t and propsize combinations. Or you could figure it out if you have a tachometer. Take a small prop, a three cell battery, measure rpm and divide by 12.6 or so. Lower kv uses bigger props (they have more torque). Higher kv uses smaller props. Look for other motors of same size and if and see what the recommend. Get a wattmeter and experiment. If the motor or esc gets hot, you are pushing it too hard.

 

[Mr Man]

I've heard of a device that will tell you the kv rating. Once you know that you can guestimate cell coun t and propsize combinations. Or you could figure it out if you have a tachometer. Take a small prop, a three cell battery, measure rpm and divide by 12.6 or so. Lower kv uses bigger props (they have more torque). Higher kv uses smaller props. Look for other motors of same size and if and see what the recommend. Get a wattmeter and experiment. If the motor or esc gets hot, you are pushing it too hard.

Thanks!

 

[LitterBug]

I have run 3S motors on 6S. It's more about making sure you don't overprop/overload the motor and watching the temperature. I need to throw some Avatar gear on my old A450 and F550 frames and shoot some "modern" video flying some old school multirotors. I had my F550 at FliteFest this year. Only flew it LOS for a brief period but people were like WOW when they saw me punch it out on 6S. Running Sunnysky 2212 980KV motors with 9" T-motor props now.

This was it running on 3S back in the day with a dRonin FC and beta firmware.

LB

 

[Mr Man]

Thanks man! I think Joshua Finn did that too with his pylon racers.

 

[Merv]

Need to know if I can run it off of 4s.

I agree with Litterbug, with motors, any voltage will work just as long as you don't over prop it. The higher the voltage the smaller the prop will need to be. I like to run a prop test on any new setup.

I think I would start with a 6 or 7 inch prop on 4S. Run the motor full throttle for 10 seconds, then stop, check the temperatures of the motor, esc & battery by touching them. Warm is OK, but if so hot you don't want to hold them, then stop. Try a smaller prop. If it passes, try a 30 second run. If it passes, try a 60 second run. If it passes, it's time for a fly. It always a good practice to check the temp of everything when you land. Stuff that worked when it mild outside, may over heat when it's hot outside.

 

[Mr Man]

Thanks @Merv !

 

[Merv]

Thanks @Merv !

I should have said, if it passes a 60 second run, start the test over with a larger prop or go for a fly.

 

[Mr Man]

I should have said, if it passes a 60 second run, start the test over with a larger prop or go for a fly.

Thanks!