LynnBlakeGolf Forums - View Single Post - Arc of Approach Thread: Arc of Approach View Single Post #18 02-09-2009, 03:47 AM no_mind_golfer Senior Member Join Date: Oct 2008 Posts: 118 Venturi? As in Ken Venturi? Yodeli Venturi? As in Ken Venturi? Surely you're not referring to the aerodynamic venturi effect (a decrease in static pressure_ which occurs in contracting duct flows situations).... which a golf ball is not... ever. Its the Magnus effect... circulation which causes lift just like on an airplane wing that you want to be talking about. And as far as the relative magnitudes are concerned... a 50 - 50 side v. back spin ratio would put the lift vector off a a 45 degree angle, in which case the ball would neither fly very far nor stay on the of the fairway... unless a gale just so happened to be blowing perpendicular the the fairway (at just the right speed) in which case the tournament would be postponed anyway. Low boring flight on windy days? i.e. tee it low and de-loft accordingly .... yes ... there is less wind (aka graidient) close to earth's surface... makes sense in that situation but attempting to put a "counterbalancin" "english" side-spin on? That's messing with disaster imhop. Did Ken Venturi do that? no_mind_golfer View Public Profile Send a private message to no_mind_golfer Find all posts by no_mind_golfer