Roger wrote:

Actually in some areas we have a lot of leeway and onthers very
little.
On some planes you can move the wing fore, or aft to fine tune the CG
with no problem and on others the change in coupleing can be
pronounced.

Any time you change something from the original design you may end up
in untested territory, unless it's a popular mod.


Bingo, Roger.
It's important to know what you don't know. I don't know enough to
predict what will happen, and don't want to take the time to do the
proper experiments to find out. The wings on a Dyke Delta aren't easy
to adjust. Impossible really, as it would entail rebuilding the entire
wing. The stall progression on the swept delta wing is also different
than a conventional wing. Lots of variables. Just enough knowledge to
know the variables exits. Leave well enough alone, I say. 8*)

As for switching the engine, there's a decade(s) of flying data that I
can dig into and feed off of. Maybe I'll learn as much about
aerodynamics and structures and design my own delta some day, or maybe
I'll finish this one and have enough fun to forget about it. 8*)