Actually it is safest bet to that speed,

You can modified to make it steer by:

1) with moving the wheels closer to the center you will be looking at the expense of mild banking while performing a very slow turn, and the resistive point backroll which do not affect the direction, however will need a lot of time to get use to.(based on the personal experience).

2) with the wheels closer to the center and steering to the wheels turn on, you will get smaller turn radius at the expense of uncontrol banking rolling limit ,that is when the turn banking tip-over the aircraft and rolling become uncontrollable. Which is highly undesirable, unless you are very familliar with how the aircraft will react to holding or tapping the directional keys.

It is suppose to be fast but not exactly shaky, sorta like flying a sub sonic jet aircraft with a slow roll of sailboat.

If you are comparing shaky nothing beats multiple small airblades aircraft drone-like responds when doing a "hold" steering, where the jerk back are really jarring and jerky and uncomfortable to me, which is the reason pilot out cockpit while handling them.

Lastly, huge airblades aircrafts acting like a lumbering tow vehicles, which is okay for local 2-5km runs but if you are looking at cruising over the planet both ends of a 24km planet, which would be ideally real life 2~hours or a more tested 3~4 hours marked passage given the flight ceiling, which I more then often fell asleep towing at 36khp.

However, do feel free to explore whichever suits you more as time goes on...

Just tried it out and it works fine, at the highest altitude you can reach 240 KPH if you keep tapping S. But ... I don't like the tapping. :) Without tapping it reaches 54 KPH, but then you can't steer while flying forward, so I think i will stay with the 'slow' version (at least most of the time). I like to travel in a relaxed and comforable way rather than in a fast and shaky one. :)

Anyway, thanks a lot for teaching me how to speed up vehicles!