RE: GSP KATANA w/ Brison 2.4
mudspike
A plane with such little wing and a gas engine will fly, it will just not be too much fun for 3d, heavy aerobatics, and landing....you might just have a mudspike LOL!
I learned a lot in the hobby about wieght, you want this plane to come in at 12lbs TOTAL or less, 10.5 lbs would be cherry. With this gas engine you will be in the 13.5-14.5 range, does not sound like much, but enough to cause high speed stalls, no 3D, and fast landings.
OS 1.60. Saito 1.80, Moki 1.80 are the only choices for this plane.
Areobatic planes for the 2.4 - GP extra 300 78" Patty, H9 Atallia CAP 80", DP extra or Edge 78" or anything else with 1200 + inches of wing area
good luck