Shogun V2 - Feigao brushless - pinion suggestion?

[Boidman]

I was given a Feigao 2045-3600kV brushless motor:

Size: 20mm diameter x 45mm length
Shaft size: 2mm
Weight: 62g(2.21oz)
RPM/V: 3865
Internal Resistance: 0.0687 ohm
Without load: 0.7A
Maximum Amp Draw: 16A

At this point the Shogun is stock. I enjoy controlling the ballooning effect in fast forward flight with the stock blades. I use wooden blades when working on a bit of 3D.

My limited contact, with folks about as inexperienced as me, gets a variety of suggestions for the optimum number of teeth for the pinion, when the Feigao gets installed.

At this stage I am a medium competent flyer, improving regularly. I will almost certainly do some mechanical upgrades before moving on to the next helicopter.

Right now it might be most important to have a relatively cool running motor, and longer runtimes from the ThunderPower 2100s. I have a Phoenix-35 available to drive the motor.

If you have a suggestion, would you also give your reasoning, to help me to learn?

Thanks

[jondbennett]

I would start with an 8 tooth. You want the motor RPM to be as high
as possible. That motor should be close to
40K RPM at 11 volts (as I understand the K/V thing).

You are trying for a head speed around 2400+/-

[Boidman]

"Self", I sez, "why not swing back by HeliFreak's one more time, just for sh!ts n grins".

Thanks jondbennett. Glad you came out of the woodwork, even if just for one post. Your comments agree with what i have learned elsewhere, along with the calcs I ran, but wasn't sure of.

Keep twitching the gimbals.