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Nov 17, 2013, 09:43 PM
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Would SunnySky X4112S-11 KV400 motors work for a Quadcopter?


Hello, I was wondering if the X4112S-11 KV400 motors would work for a 2 Kg quadcopter.
What is the min trust that the motors should have for a quad?
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Nov 19, 2013, 12:11 PM
Registered User
Quote:
Originally Posted by MARTYNOLY
Hello, I was wondering if the X4112S-11 KV400 motors would work for a 2 Kg quadcopter.
What is the min trust that the motors should have for a quad?
he answer to your questions is, that depends. With low kV motors you have to have a quad big enough to swing larger props because of their low RPM. Your projected weight is a little higher than say a 450mm quad, depending on the payload you are flying.

When choosing motors its best to refer to the MFG prop testing data to determine what the best prop is for the battery you are wanting to fly. Not how many mA but the voltage, 3S, 4S, 5S etc.

My largest Multi is a 800 mm Hexa running Sunnysky 4018 380kV motors spinning 14" props. It has no problem lifting and AUW of over 3.5 KG and flying 10 mins + on a single 5000 mA 4S battery. Your projected quad is much lighter and only has four motors to feed.

The bottom line is I think the 4112s are a bit of an overkill for what you have described, but I have not been able to find prop testing data on the motors. I suggest you email Sunnysky and ask for current prop testing data so you'll know for sure what the lifting capability is of these motors.
Nov 19, 2013, 02:13 PM
Registered User

Thank you.


Quote:
Originally Posted by hoggdoc
he answer to your questions is, that depends. With low kV motors you have to have a quad big enough to swing larger props because of their low RPM. Your projected weight is a little higher than say a 450mm quad, depending on the payload you are flying.

When choosing motors its best to refer to the MFG prop testing data to determine what the best prop is for the battery you are wanting to fly. Not how many mA but the voltage, 3S, 4S, 5S etc.

My largest Multi is a 800 mm Hexa running Sunnysky 4018 380kV motors spinning 14" props. It has no problem lifting and AUW of over 3.5 KG and flying 10 mins + on a single 5000 mA 4S battery. Your projected quad is much lighter and only has four motors to feed.

The bottom line is I think the 4112s are a bit of an overkill for what you have described, but I have not been able to find prop testing data on the motors. I suggest you email Sunnysky and ask for current prop testing data so you'll know for sure what the lifting capability is of these motors.
Thank you very much for your answer. I decided to go for a higher Kv, about 600kv or above.


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