This is based on MAPA's great flying Do-228, that I was fooling around to replace with VTOL engines.

How to fly:

TAKEOFF

1) Just push the throttle to 100%
2) when you reach about 300 ft or (100 meters) move the VTOL up SLOWLY !!! until VTOL to 100% UP - the plane will move forward. When the indicated airspeed is greater than 100mph, the two main jets will run and add the forward speed. Max speed is around 450 mph

LANDING:

You can reverse the VTOL (Negative 100% or Lowest) to reduct the airspeed very fast. when the speed it around 100mph, main engines will shut down. Then move the VTOL to ZERO and land vertically.

OR you can always land line a normal plane using throttle controls-

HOVERING:

You can adjust the VTOL engine to back and forth and hover the plane at almost stopping in the air. Try it.

Video Tutorial; https://www.simpleplanes.com/Videos/View/1746522/How-to-fly-VTOL-Do-228X