no, but i had problems with that to. is it just DC10's and me? none seem to want to take off for me.

that's what i wanted to point out,but it was just  a wrong key,okay?

You basically need more tail-down foce if you have to get to 280 knots, unless the weight or wing area/incidence/sweep is really out of whack.  A downward force on the tail causes the nose to rise--"rotation".  

To increase tail-down force, in the aircraft.cfg file:

(1) move the horizontal stabilizer more to the rear--like a lever, the further the end you are applying foce to is from the fulcrum, the more torque you will have (nose up/tail down force in this case).

(2)  just set your take-off trim from the central, "neutral" position to something more nose-up.

(3) Or decrease the incidence of the vertical stabilizer  This will cause air to reflect upwards, pushing the tail down and nose up.

I think it's best to just adjust (1) until you get it about right.  However, if you then need to much nose-down trim in cruise, work on (2).  (3) should just have the same effect as (1).