There are only 2 engines I'd consider for this plane: Saito 100 or YS 110. Saito 100 will have enough power for most 3D moves if I prop it right w/ 16x4W using 20%+ nitro fuel while keeping the CG tail heavy enough for easy harrier, hover and waterfall. YS 110 would be ideal if I want continuous snapping on vertical lines, using 16x6 or 17x4W.