Ballast Fuel
Hey All
Its been over a year and half since I last flew the X, but as I remember...
The ballast fuel was carried in the wings (if I remember right, could be wrong on that part). You only needed to carry that fuel if you had a certain C of G condition and then it did become 'unuseable' to keep the aircraft within the limits.
Of two years flying and over 1100 hours, I never once had to use ballast fuel to keep the aircraft in C of G.
Hope you bet something good!
Gord