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Old Feb 25, 2012, 12:56 AM
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Multicopter Motor Guide 101

Hello!

I've been doing a lot of research on building a quad. Read a lot of the beginner threads here. I'm still confused regarding motor selection. I was hoping some of you could give a brief guide to selecting and comparing one of the most important decisions.

What you should know before selecting your motors...

What exactly is the KV rating?

How do you match a prop for a particular motor?

How does the weight of the motor come into consideration?

What to look for regarding max RPM and Working current?

Any recommendations on inexpensive motors.

Thanks!
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Old Feb 25, 2012, 01:18 AM
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KV rating is the RPM per Volt

so a 1000KV motor will rotate at 11,100 RPM at 11.1V

will have to wait for answers from those with experience for the rest of the questions
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Old Feb 25, 2012, 04:22 AM
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Here's a useful resource for comparing motor/ battery/ ESC /prop combinations :

http://www.ecalc.ch/xcoptercalc_e.htm

Happy flying
P
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Old Feb 25, 2012, 10:50 AM
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So, higher KV is not necessarily better for a quad? Is their a rule of thumb high or lower KV for acrobatic, or as a stable camera platform, how does the KV selection effect your prop choice? High KV with a smaller prop equals lower KV with a larger prop?
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Old Feb 25, 2012, 11:18 AM
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"I've been doing a lot of research on building a quad.
How do you match a prop for a particular motor?"

What is the projected weight of your quad ?
200g, 1000g or more ?
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Old Feb 25, 2012, 11:34 AM
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Quote:
Originally Posted by disneytoy View Post

What you should know before selecting your motors...

weight of EVERYTHING you plan to fly


What exactly is the KV rating?
rpm of motor at a given voltage

How do you match a prop for a particular motor?
by the amp draw with the prop selected


How does the weight of the motor come into consideration?
the lighter the less you have to carry?

What to look for regarding max RPM and Working current?
whatever you like as long as you know what you are doing

Any recommendations on inexpensive motors.
loads but this has been said so many time the thread is flooded with setup info

Thanks!
no worries
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