With this plane, I can regulate the taxi speed under the 60 knots. I have tried every variation of prop and trust settings. Have done a full uninstall. Everything reinstalled, step by step: FSX-Gold, SP1, SP2, Accelerator; Add-ons. Passing tests to see if it has already occurred. My FSX has it from the beginning. I have tested with Cyborg Evo-yoke (Saitec), and without yoke, only keyboards. Makes no difference? I have installed my FSX on another PC, he has it to. Forums searched but I found nothing . I can taxi perfect with other airplanes such as Beechcraft Baron, also a twin prop.My question: Can someone tell me if he can regulate his taxi speed with this airplane under 60knots? The normal taxi speed is 20knots. Is there something corrupt in my FSX and do I have to buy a new package. Or can I fix it in one or other file.Please advice!

I think you're talking about the default plane, but I only have experience with the Aerowrox King Air. Make sure you're in low idle, if its not, the plane will want to speed up even at closed throttles.

And in that, it is EXACTLY like the real thing. You may also want to consider pulling the props to beta.