Nik wrote:
What would you do in the following situtation:

You are approaching a non towered field, communicate right and all that
stuff, your on final, suddenly a cessna pulls up and starts it's take
off roll.

I would immediately abort the approach, climb, and maneuver so I was
flying parallel to the runway at a safe distance until I could get a
better sense of what the other pilot is going to do. As soon as
practical, get out of the pattern and re-enter it per the published
procedures (standard or otherwise). At no time would I put myself in
front of the other plane, since I then lose my only defense against a
midair--visual contact with the other aircraft so I can maintain
separation. How can I trust that this pilot, who didn't acknowledge my
presence before by either waiting or making radio calls, will see me?
Answer: I don't trust that pilot, or any other when it comes to my own
safety.

Also lets bring the same situation to a towered airport where the
controller tells you to go around while you are on final.

I go around. If the scenario matches the above, I would still abort,
climb, and fly parallel to the runway, all the while explaining to ATC
what my intentions are. I'm not the one who would get busted because
I'm complying with the instruction to "Go Around", I'm the one on final,
and I'm maneuvering to avoid a collision. An argument *could* be made
(though I'm not sure how strong or weak it is) that I was in an
"emergency situation" and was deviating from whatever regulations I
needed to in order to avoid contact with another aircraft.

The way I fly, if the controller says "go around", by the time he
finishes the word "around", my throttle is already wide open. My
instructor taught me well to have an instinctive reaction to going
around. It saved my bacon a couple times after some approaches that
didn't translate into good landings.

I am asking this because I am just wondering that at some point the
aircraft could collide (one climbing out, the other at pattern
altitude), and what the pilot going around should do...

The aircraft will collide only if you let them (provided you have time
to avoid the situation).

Chris G.