Contra-rotating Ducted Fans are Fun!
I am not a great pilot and I don't have a joystick, so I never really got into making planes. But, with contra-rotating ducted fans, even a numbskull like me can put a plane on the helipad! It doesn't work except with the the fans glued tip-to-tail like this, though. Not sure why.
No matter what configuration or size the fans are, the top speed of an airplane powered with these seems to be about 270m/s. And, so long as there is daylight, I can travel at that speed with no fuel forever.
This configuration also seems to glue the plane to the sky and makes acceleration and deceleration nearly instantaneous. It is definitely easy mode.