Hi Alejando,

The Fuji 32 weighs 4lbs once you include muffler, prop bolt and washer, and mount. That said I would imagine that the weights you gave for the Saito at 2.3 lbs would be at least 1.5 lbs lighter than the Fuji. Thats a big difference.

If your heart is really set on a four stroke twin I would go with the Saito 182. That engine makes just as much power as the Fuji I think in that it makes more tork. The Fuji can turn a 18-8 prop but it needs to rev to do it. If you over load this engine it labours more than the Saito would.

The Saito 200 is an inline twin which I think would look funny in this type of plane. However the Saito 182 would look very scale and if the plane came out at 12 lbs it would fly very well. Also power would be truly unlimited and hovering would be reasonable at about 3/4 throttle I think. The Saito 300 would be overkill in this plane in my opinion, and you would be sacrificing wingloading over performance.

Also when I built my pitts I covered it in fabric, if you use film type coverings you will save another 1/5 lbs. Also I would not recomend putting the servos for the elevators in the tail. It would become tail heavy. Just move your battery back until you get it to balance.

Good luck in your choices.