Neither I nor my friend know much about airplanes, but I think I know
what the parts in this picture are called. My friend does not agree
with me. I'm not saying what I think they're called, partly to avoid
influencing the answers and partly to avoid embarrassment if I'm wrong
.

What's the correct nomenclature for parts 1, 2 & 3?

http://img177.imageshack.us/img177/8...inggearlm1.jpg