Hi Rajib, I hope you're enjoying shopping for your Phoenix Models Funstar 3D ARF. You should find either the .46 AX two-stroke or the F56-a four-stroke from O.S. Max to be ideal engines for the Funstar 3D. You could use the .55 AX two-stroke or the FL-70 four-stroke if you'd like, but the smaller displacement engines should provide enough power to pull straight up from a hover. An APC 12x4 propeller would be a good 3D prop for the .46 AX. The F56-a would probably turn a 13x4 well.

Good luck and good shopping!