I am going to use an e flite 46 in mine. I just finished my speed controller using a castle creations 60 amp controller. The tango will be my first large plane with e power. The plane sure went together fast it should be alot of fun. You guys should see my girlfriends cat when i run up the motor it just streaks across the house. I have been wanting to do a 40 size electric for a long time the tango has made it really easyfor me to do this just to bad we have snow on the ground. I went over to the church parking lot where i fly alot and there is puddles of water everywhere. No flying today but hopefully the water freezes and i can give it a go tommorow. I should have scooped the flying field snow off this week since im on vacation this week.