One more thing "extreme speed"

These planes are going 120+mph turning VERY high rpm (anywhere from 18k to 35k rpm) the wings are SUPER thin and everything possible is done to reduce drag, props are short but very high pitched flight times are most of the time short as for high speed you take a HUGE engine on a TINY plane meaning not much room for fuel

Some planes dont use a carb that is there WOT full time not very forgiving, There control surfaces are very small to avoid fluter