Which props should I buy for the T-Motor MS2212-13 KV: 980?

[G+_James Coleman]

Which props should I buy for the T-Motor MS2212-13 KV: 980? Ep 123 notes don't mention which props to buy and I'm somewhat lost on how to choose a prop. The props I bought was the HQ 6x4.5 Carbon Composite but the motor's shaft (if that is what you call the place where you place the prop and screw on the item which holds it in place) is a little too big and will require some drilling of the prop to fit it in.

 

I'm going to drill these props, but I would like to know what to buy so I can order a ton of them for backups.

[G+_Adam EL-Idrissi]

If you have a local hobby shop that deals with planes,I would suggest a prop reamer. I forget the reasoning for this over drilling but some of my flight buddies said to use the reamer when I flew rc planes.

[G+_Taylor Graham]

There's a lot more to props than what fits on the motor.

http://cdn2.bigcommerce.com/server3100/531da/product_images/uploaded_images/ms2212-spec-a.jpg

All the info i saw on these motors were with the props mentioned in the that test. With a motor that size, you're probably going to want to run a larger prop. I kinda doubt those 6045s will get you off the ground.

[G+_James Coleman]

Taylor Graham So if I understand that, ( should go with a 10x4.7 or 9x4.7 as that's what's been tested with 11.1V?

 

I'm still wondering how do I know what prop will fit the motor.

[G+_James Coleman]

Adam EL-Idrissi I see that Amazon has some, I do not know of any stores in my area that will sell one.

[G+_Taylor Graham]

Its being tested there with an apc 1047 and 9047, so those should work. Look at that chart to see whats different about each props. TL;DR: bigger prop = more current draw.

Other brands of the same size will probably work, find a build using these motors and see what props they're using.

[G+_James Coleman]

Taylor Graham Thank you for your suggestions.

[G+_Taylor Graham]

http://www.readytoflyquads.com/propellers/

Padre recommends RTFQ. They have both props, but from a different brand. The carbon props should work for you, but don't quote me on that.

[G+_Fr. Robert Ballecer, SJ]

With a 2212 spinning at 980, I would suggest 10" props if you're going to run a 3s battery, or a 8" prop if you're going to run a 4s battery. -- Have fun!

[G+_Nathan Coon]

Can you teach us how to make that type of decision on our own or point us to a place read up on it.  I've been doing a little research and I'm finding hard to find straight answers on the subject. 

[G+_Fr. Robert Ballecer, SJ]

Yes... when we get to the "Advanced Thrust Tester" in 6 weeks, all will be explained!

 

But here are some basics:

1. Given two motors with the same size rating but different KV (i.e. a 2213 980KV vs. a 2213 600KV) the lower KV motor offers more torque and can spin a larger propeller (though not as fast as the higher-KV motor can do with a smaller propeller)

 

2. Given the same motor (2213-980kv) you can use a 8" prop with a 4s battery or a 10" prop with a 3s battery. Both will pull about the same wattage, which is your limiting factor. (Too much wattage = dead motor) -- Since KV is rotations per minute x voltage, and since a 4s battery provides 14.8v vs. 11.1v for the 3s, that means you can spin a smaller prop faster, or a larger prop slower.

 

3. A larger prop is more efficient, but a smaller prop can be spun up and down more quickly, which gives you better performance. 

 

More to come in 6 weeks. :)

[G+_Nathan Coon]

I figured you'd be getting that. :)  Iv'e figured some things out, but there is definitely a void in the knowledge hole begging to be filled!  Thanks for all you do!