I've been answering questions about jet engines since 2007, and this is one of the best ever. Let's squeeze our minds into goo over this one!

If you work on or with the F-135 engine, maybe you can share a bit of info.
If you are not in the know, but think you might have an idea... post at your own risk.

The basic question is "where does the power go?", when the lift fan is disengaged.
If you ignore that point, well...