Saxon, yes I agree it is very easy to overbuild, but if you get it just right you will shoot right past everybody else because you are building more and sooner.
CW stands for Charlie Whiskey which is my call sign in combat flight sims which is also my initials.
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A propeller is just a big fan in front of the plane designed to keep the pilot cool. Want prove? Stop the prop and watch the pilot break out in a heavy sweat!