Basic flight aerodynamics 101

Very basic flight dynamic info for Full sized planes from the smallest trainers to the biggest jets and applies well to R/C flying. Of course fully aerobatic planes are capable of changing the rules to some degree

More airspeed = more vertical lift

Less airspeed = less vertical lift

Turn changes lift vector sideways in direct relation to angle of the bank which will cause loss of vertical lift.

Trim is always used once the desired airspeed is reached.

You also need to remember that more power does not always give you more lift as angle of attack (AOA) of the wing is everything.