Yeah, now try a fully loaded lancaster and see what it takes to get off the ground without hitting trees. -- you taxi to the very edge of the airfield square, behind the threshhold, run up the engines as you turn onto the RW direction, roll down the runway, hit two notches of flaps as you pass 100 mph, overrun the runway, hope there aren't any trees blocking the end, then at 120, you pull up as hard as possible while retracting gear, get above treelevel, and hope you have enough juice left to accelerate before you drop back into the trees.
Just as long as there aren't any hills down there you'll be ok.