What wind is a 5700?
 

Anyone have an idea what a 5700 is compared to against a turn brushless motor?

Maybe a very quick sorted 19t or maybe a std 15t... (At 7.2v..)

I thought it was a bit more powerful than that, possibly 6.5 or 5.5.

Ive had a look at the B4 manual and they say the

6.5 is 21 pinion and 81 spur
4900KV motor a 19 pinion and 81 spur
6100KV motor a 18 pinion and 81 spur

Confused, yes I am.

It's about a 6.5t

Do you want to know the equivalent of the 5700kva in brushed 't' terms i.e. 19t or 15t... OR do you want to know the 't' rating in brushless turns i.e. 6.5/5.5t

To calc max no load rpm for 5700kva BL...

5700kva x 7.2v(nimh)= 39898 rpm...

5700kva x 7.4v(lipo)= 42180 rpm...

On the Novak site 5700kva is very close to a 7.5t(5800kva) velociti series BL...

Cheers, kindof makes sense. Close to a 6.5 is good enough for me.