If it's the Lil Rascal 180 size, you have to change to a 7X5 APC E-prop, Mine on the stock motor and a 1200 2 cell lipo flies nicely. It does'nt light the world on fire but cruises fine and will loop ,for about 15 min. It's a very cool little plane and handles wind well for it's size. I want to drop on an Astro BL 010 and on 3 cells it'll really move. Try the 7X5.