> dont understand what the "tweaked, NoFudge, Vonmises, & Von+" buttons are supposed to represent.
Thanks, I've added a little info to the page today. The prototype isn't finished and there are four different simplified static math models, some of which are more accurate in some situations for some values but not all. As you can imagine, modelling rotor dynamics of everyone's heli is an almost impossible task but with some experience you can draw some useful conclusions from the estimates although sadly limited.


Just a few mm on the blade chord can make a noticeable RPM change.
Longer flight times are gained with lower head speeds by reducing the 200 to 300mph tip speed drag, then gearing the motor for it's peak efficiency range, normally ~80% of full throttle.

Mini Titan 10T calculator estimate (Tweaked static modelling), change the main rotor's Blade profile drag from 0.0035 (for micro's) to 0.005 or 0.01 (for mini's) and the numbers might be even closer... who knows the actual profile drag of a MTitan blade anyway?
Edit: increased blade chord from 30mm to 33mm
Mini Titan 10T calculator estimate revised with Von+ static modelling which seems closer to reality for ~700mm rotor mini class belt tail electrics.



By swapping across 9T,10T and 11T, and hitting the hover button estimates that in this case, each extra tooth adds around 1 Amp to hover current and looses 1 min flight time of hovering from a 2100mAh 4s pack. Of course there are a lot of variable and data not accounted for, even a slightly over tight belt will trash all the best estimates in the world.
Running a low head speed will impact the heli's handling, slowing your flip and roll rates. How low is to low for your flying? I don't know. 10T looks to give the 2600-2800 rpm recommended. Try the 9T for an extra min or two in the air at ~2400rpm (depending on throttle curve and pack voltage in the flight) but the slower roll rate may be too slow for you at the end of a pack. I'd be surprised if you can get 15mins on such a belt setup but you never know. Have a play .