Originally Posted by biskit
I know it's off topic, but there are three types of drag - you forgot parasite drag.
Yes, you are right. I just rolled profile drag and parasitic drag into the same thing. Profile drag is normally applied to wings and parasitic drag to fuselages and bits hanging out such as tail servos ( I am just changing a two servo in the tail B6 into a single fuselage servo partly for drag reasons). But both these drags are just a consequence of pushing the thing through the air and are independent of weight. The induced drag is a consequence of creating lift and goes up with the weight, quite sharply as the coefficient of lift approaches one in turns. Drag times speed is watts so wastes our watt.minutes. So the lighter the better as Eric said.