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# First ever nose-in hover! Wahoo!

Posted by JWags | Dec 22, 2006 @ 05:34 PM | 3,267 Views
As some Brits are wont to say, I'm quite "chuffed".

https://www.rcgroups.com/forums/show...8&postcount=19

Not just hovering, either. Transitions from nose-in to flying circuits, to side-in, to touch-and-goes. All in one battery pack. The last time I flew I was still timidly doing tail-in and side-in hovers.

It was as if some neuron finally made a connection between the "heli" and "airplanes" part of my brain. My reflexes aren't right all the time, but the CX2 is stable enough that it gives me a chance to see and recover from the mistake before it gets expensive.

The Blade CX2 is a neat little heli, and probably the only thing I've ever bought on impulse that I don't regret.

Now we'll see how long it takes to get overconfident. "Pride cometh before the bloody expensive crash".

# My own FAQs for motors

Posted by JWags | Dec 21, 2006 @ 06:14 PM | 2,991 Views
Gathered here are some rules of thumb and links to discussions for electric motors. I'm putting things here so I don't have to search. There will likely be many, many edits of this post.

Posted by Nethole:

Quote:
 Originally Posted by Nethole

Definitions:

Rm = "Rm is the copper resistance of one motor phase"

Calculating or measuring Rm
DIY Rig to measure Rm

Nice post describing Kv and Kt (the entire thread is interesting)

Rules of thumb:

More winds on a given motor will increase torque and decrease Kv. I believe this is because the magnetic field with more turns is stronger (attracting/repelling magnets with greater force). Since the inductance is also greater, the field cannot expand/collapse as quickly which will limit how fast the motor can commutate.

Switching from wye to delta increases the Kv by a factor of 1.732 (the square root of 3).

Delta= higher Kv, wye = lower Kv. (thanks to B.L.E., from whom this is "borrowed".)

Measuring Motor Constants discussion.

Nice chart on equivalent wire gauge when using multiple strands.