RE: AK Models Su-27 with push/pull configuration
I'll take a stab....I'm looking at my AK-27 "half built" plane right now and I think it would really take away the looks to add a prop to the back. Even if you tried to put the motor midway (like the Balsa USA enforcer), it would take away the strength of the body because the wing area is not that large.
I too feel like the Jett engine is a bit much and if you are willing to sacrifice a little power you might want to look at the Evolution 1.00NX or the OS .91.
It sounds like a great project though.