So what? Why would you ever put full fuel in a Decathlon? The extra
fuel is for cross countries. We usually just kept 10 gallons in it.
When I did my CFI I went up and did 2 upright spins (each direction )
and 2 inverted spins (each direction). What a blast! I was already a
Decathlon pilot so I did some loops and rolls before heading back. We
probably burned 4 gals. Not too many people have the internal guts to
fly more than 45 minutes in a D anyway.

-Robert, CF

EDR wrote in message ...
I cannot tell you what the FAA requirements are, but I will tell you
that with two full size adults in the airplane, you cannot have full
fuel onboard a Citabria/Decathlon and be with in the legal CG.
Make certain you play with the W&B before you fly.