ORIGINAL: jh4db536

the trex is a 20-35amp machine and your battery only allows 18amps to flow out of it...that's why it shut off. a max pitch climbout is probably the most energy consuming move you can make. that amount of current draw probably pulled your voltage under LVC or hit the current limiter.

i think you need to upgrade your equipment before you total the heli. a great heli like the trex is only as good as the worst component that you put on it.

BTW, what pinion are you running??

low headspeed will sap control and responsiveness

honestly i think your problem(s) are:

#1 the battery. 10c is not adequate esp for that 430L motor. that is a hot motor. u probably need 2200mAH 12c-15c at least.
reason-
even if youre using the correct pinion 11 or 13t (assuming you are), that low C rating is probably sapping headspeed (voltage drop) and causing cut outs. Not safe for the heli's sake or your wallet. probably contributes to poor response.
solution-
apex 2200 15c. probably the best & best bang for the buck lipo you can buy

#2 get rid of those s75's.
reason-
they might work on a little BCP, but a trex is like 50% bigger. and we know just how "adequate" they are on the BCP HehE....save them for a slowstick.
solution-
someone mentioned HS65's for the cyclic, that would be a wise move. buy a nice gy240 only to use a poor tail servo? the gy240 is capable with the right setup. if you want a cheap but GOOD tail servo try the hitec hs81. it's bigger than your average submicro, but it gets the job done and it's cheap and easy to get.