with either of these planes is it possible to land on a gravel road? or do I need a smooth runway I looked around and I can't find the diameter of the tires. Do you know how big they are. and is it possible to put bigger tires on them for rougher terain. As far as an instructor I don't have that luxury. I live in a small town and only know of one other person that flys planes.. and he is just getting into it to. Kinda like helis I had to teach myself.. yes I learned by trial and error and had to replace alot of parts but I figured it out over time. I will have to do the same here with planes.