Hi all,

Recently built a electric plane with 400 motor but could not get hold of the recomended prop which was a 5.5 x 4. all my model shop had was a 5.5 x 4.5. How would this change the handling? Also i think ive worked out that the 5.5 bit is the length but what is the other figure for? One last thing, the plane feels a bit under powered could the wrong size prop be causing this?

Thanks

Joseph