Ball Distance at differing temps

[peterjthomps]

Hey folks, anyone done or know of any research that can help extrapolate different yardages based on a range of temps? Essentially, if your 8 iron is 145 at 75 degress, what could you expect at 40 or 95 degrees.

 

[leon]

You should see the pdf linked here (in particular page 31):

http://www.brianmanzella.com/forum/...ecting-ball-flight-question-3.html#post185520

 

[peterjthomps]

You should see the pdf linked here (in particular page 31):

http://www.brianmanzella.com/forum/...ecting-ball-flight-question-3.html#post185520

Thanks for pointing this out. It doesnt exactly give the formula to extrapolate the temp/yardage difference, but ill use the graph on page 31 to calcualte the slope, from there ill post a simple calculation that should give a crude way tro figure the yardage out.

 

[peterjthomps]

Ok, i have put together a simple spreadsheet to do this calculation, based on the graph provided in the .pdf in the Wind Effect thread. Granted, its only as accurate as the graph provided, so it will be interesting to see how close the results are during real world testing. One thing however, i do not have a way to post an excel spreadsheet on this site. Any suggestions?

 

[dbl]

Is the relationship linear? Can you indicate if it's like 1 yard for every degree F...or whatever?

As to the spreadsheet, you can upload to a free place like Mediafire

 

[peterjthomps]

Is the relationship linear? Can you indicate if it's like 1 yard for every degree F...or whatever?

As to the spreadsheet, you can upload to a free place like Mediafire

Thx DBL. As to your question, yes this is calculated using a linear relationship. Standard slope calculation from Algebra 101. A rough rule of thumb looks like 1 yrd per 5 degrees F. (.229 yds per degree F to be exact)

The spreadsheet is here:
Golf Distance Calculator.xlsx

Again, this is calculated using the previously provided data from the Wind Effects thread, I have only done the math.

 

[chino]

From USGA :

Temperature: Air becomes lighter as temperature increases; warmer air also rises more than cold. That translates into less resistance to ball flight, reducing drag and lift, resulting in lower trajectory and minimizing slices or hooks. According to Golf Journal in Sept. 2002, the mechanical golfer used by the USGA in ball testing, Iron Byron, traditionally generated clubhead speed of 109 miles per hour. At that velocity, carry increases 1.3 yards for every 10 degrees (Fahrenheit). When temperatures exceed 100 degrees, professional golfers swinging around 120 mph can gain as much as 15 yards on a drive versus when it's 70.

Barometric pressure: A drop here makes the air lighter, allowing for longer ball flight. Positioned at 5,000 feet, Iron Byron would pick up 10 yards over the distance achieved at sea level. At Tulsa's elevation the gains are appreciably less, although they could spell the difference between landing next to a flagstick or burying short in a bunker guarding a tucked hole location.

Humidity: A yard or two span between completely saturated to bone-dry air. For elite players seeking distance the goal is shirt-soaking humidity: Dry air is denser and causes more drag, reducing ball flight. (And in case you're wondering, a 15-mph tailwind can tack on six yards for Iron Byron while a similar headwind takes away 14 yards.)

Read More Weather: A Major Factor: Golf Digest