Hello Reg Mason
I am going to help you.
1: Your plane is a trainer then you can fly this plane perfectly with a small engine.
2:If you use 2 FUJI 50c.c your plane flys with a 100c.c too much power !
3:Your plane needs a 80 c.c max power !
4: The 2 FUJI 50c.c are (5.2hp + 5.2hp= 10.4hp ! ) very strong...
5: The 2 ZENOAH 38c.c are (2.6hp + 2,6hp=5.2hp ! ) very good...
6: If you install 2 ZENOAH38 you would fly this trainer twice more of time !!! good.
7: The most pilot which they use more than one engine prefer ZENOAH RELIABILITY !
8: Your plane can fly with 2 small engine ZENOAH 26 ! but I advise you take 2 ZENOAH38 with a big fuel tank.You can install the video camera without problem. Do not worry about the weight !
9:The worst you can do is take 2 engines 3W24 ! I know they are very power and consume very much !
10: THis engines runs with electronic ignition connected to a battery 4.8 v. You only can fly your plane
5-6 flights of 10 minutes each one!
10 : Take the best of world small engines for aircraft ,magneto ignition ZENOAH.
Thanks.