i know its a four sroke but this thing would look very fast doing 90-100 mph i realy hate the sound of two strokes so if anyone has any imput id be glad to hear it this plane ways 5.7 pounds i would like to have unlimited vertical i was thinking maby a saito 82a or the YS 63 if there are some of you that are looking and dont know the web site its www.kmp.ca