TopShelf2010:
xlviii:
SidersBest:
every 3 feet equal a yard and check your wind effect.
Siders Best
+1
Also, I subtract a yard for every four feet down. I know some who use a slightly different calculation for downhill, but that works for me.
I would agree with you here. There are many holes, for me personally, where the 4 foot down works better for me as opposed to the 3 foot rule. I am not sure why this is.
Don
I believe it's because of the arc of the ball. On a downhill shot, your ball is still in the air when it normally would have landed. As the shot continues through the air, it's rate of forward travel becomes less and less. (Wind resistance slows the object down more and more and it's forward speed decreases.) In other words, it's coming closer and closer to travelling straight down the lower it goes. On an uphill shot, the opposite happens because the ball hits the ground sooner.
I hope that makes sense. The only time it should be very noticeable (and important to calculate differently downhill than up) is on a steep downhill shot such as CB #9, but the calculation seems to work pretty well anywhere.