what headspeeds are you guys getting usinng 15t pinion and 210t spur

??? [sm=50_50.gif] What heli are you talking about. I dont know anyone running a 15t pinion.

it's not 'running' yet but it's a 450 xl custom. i have upgraded... it has all the bling from micro-heli.
i am just wondering if this is a good setup

has anyone tried it?
i am looking at 1964 head RPM with 15t pin and 210t spur

any comments and advice welcome

For a trex i recomend buying what ever size pinion you need to obtain a 2800 to 3000 head speed with your motor.

cool, i will def keep that in mind!!! thanks i have a few more and i'll do the math to see which one works that way

thanks...
Scott

ok, let me get this right.... i was doing the math and was wondering if my calcs were right..... am i really gonna need at 30(plus)t
to get this result
i am using the fomula spur divided by pinion =x then 27000 divided by x = head RPM

am i even close??? i don't know enough (not running still settin up) about the specs yet to use the link you gave on the other thread

ready heli has a headspeed cal and you can use this one as well http://dhrc.rchomepage.com/calc.htm

o dont know about the XL but. me SE came stock with 150 t main gear, which i think is youjr problem, try using the 150 for calculations and see if that helps

which motor are you using????



I ran 2400 rpm in normal mode and 3000 rpm in Idle up...


anything under about 2200 and the Trex feels sloppy