Please explain why the crank handle shown is this funny shape rather than being straight.
Sigh. You know why - you can get greater torque with a greater turning radius. I don't question that. But it seems to me speed is the issue here - how to get the thing going fast enough to work. If the axle the cord is wrapped around has a circumference of 5 cm and the flywheel has one of 50 cm, is it faster to pull a cord 5 cm or move your hand in a 50 cm circle? At the beginning you could always start the flywheel with your hand to overcome some of the initial inertia, making it easier to start pulling the cord. Once it gets going faster, can you even move your hand in a 50 cm circle in, say, the space of half a second or a quarter second?
Why do you think mowers and outboards have a cord, rather than a crank? They need the speed to turn the engine over fast enough that it will fire in rapid enough succession to keep going of its own accord. Well, I think so, anyway...I'm certainly no motorhead, and if that's wrong, hopefully someone will correct me.
Just so we all know, this is a friendly discussion, right? and not a heated argument. I enjoy friendly, respectful debates as long as no one takes things the wrong way and gets offended. It's good brain exercise.