See, I hadn't realized the speedbrakes were supposed to produce lift. In most planes, their only purpose is to produce drag, so I found it really odd that anyone would want to extend them while on approach. The shape of the speedbrakes convinced me further that they would not produce lift, since it was a split surface that deflected in both vertical directions, which I believed would produce equal lift in both directions, thus cancelling any upward lift. Anyway, it turns out that the speedbrakes are supposed to produce lift (at least I don't see any reason why they would be set up in the FDM to produce lift if they weren't supposed to). Furthermore, the amount of lift they can produce doesn't seem to be limited at all, like with the flaps and slats. So, I added a multiplier under the table. I had no idea where to start, so I went ridiculous, using a value of 10. It was quite funny to find that the increase in lift was so enormous that the F-16 was forced into a loop, and it became impossible to force the nose down at all when I extended the speedbrakes. They pretty much rendered the elevons useless. So, using 10 as my upper limit, and 0 as my lower limit, I began a process of bisection, or a binary search, to find a multiplier that produced plausible results. This process was actually VERY fast. So, here's your fix.
Open the FDM file, and search for "Lift_due_to_speedbrake_deflection". Under the table, but within the product tabs, add the following:
- Code: Select all
<value>2.8125</value>
Approach with the speedbrakes extended, and enjoy!