Quote:
Originally Posted by xoxoxoBruce
But how do you get a continuous blade, with two red tips, and no red nose cone in the middle?  |
Good question, lets see if we can work it out.
Looking at the pitch of the blades at the top-center of the picture (where there is least distortion), I think the propeller must be spinning clockwise as we look at it. That way the blades are pushing air towards the back of the plane.
If the shutter is a vertical slit that moves from right to left as we look at the picture, I think that explains the effect we see....
In the top-center of the picture, the blades and shutter pass in opposite directions when both are close to vertical, so we see straightish blades.
On the right of the picture, the tip of the blade passes the shutter first, then as the blade swings down through horizontal the shutter has moved slightly further left so we see the middle of the blade slightly further left than we saw the tip, and finally as the blade approaches the bottom of its swing the fast-moving blade tip overtakes the slower-moving shutter, and so we see the tip again slightly further to the left. The result: it looks like a double-tipped blade floating unattached in the air
I'll let you figure out what's happening on the left of the picture yourself
