I don't mean any disrespect but if you don't know the answers to these questions ... you shouldn't make any flight attempts.

Yes ... you have a throttle curve ... which YOU must ensure is set correctly for your heli
And ... you have a pitch curve ... which YOU must ensure is set correctly for you heli.

These two curves must cause the power and pitch of your heli to interact together to produce the most power efficient performance of the heli (ie hold a constant RPM at a good power output of the engine). The least problem is that your heli doesn't perform as good as it could ... and of course you've already figured out what the worst thing can happen ... out of control heli. Actually, the worst is someone getting hurt due to an out of control heli, second is just crashing due to an out of control heli.

You need to find a local heli person that can explain these things too you or at least sit down and study exactly what makes the heli fly and how the TX accomplishes this. It's not magic ... but there is a lot to figure out. Play with with these settings on the bench (engine off) and get to know your TX settings. You can't just flip the ON switch, move the sticks, and fly. Some amount of set up and measuring and testing and fine tuning is required.

Good Luck,
d.tipton