Try unchecking it from your scenery library (the location I made) and see if the wheels still get stuck. I didn't do anything to the runway, that was "there" ... so now you have me curious. I think my beaver is slow to take off there too, so I'll do the same check here. If it still slows down, then it is something in the original. I can put a "surface" on it that might fix it. Lets nail this one.
Doug
Update ... I'm seeing the "slogging" with the scenery unchecked. So there must be something screwy about that runway. I haven't seen that before. But usually I can get up to 80 mph quickly and lift off, it takes me almost the whole runway to get to takeoff speed. So there is something screwy there.
Anybody got ideas?