Dunno about the trim required but the game manual states the following:
TakeOff speed: 195km/h
Landing speed: 180km/h
method 1: turn the rudder in the direction you want to turn, hold the brakes (i think B is the default key) and push the throttle as required.
method 2: increase the RPM of the engine from the opposite side (if you want to turn right increase the rpm of the left engine, or the other way around) (this can be associated with some amount of brakes)
Slowly increase throttle to about 30% then use brakes and rudder to control speed and directions. Yes the B key is the default brakes. When you get close to where you want to be slowly lower throttle to about 10%, is lower most of the time a motor will flame out.