Hey guys, I'm new to these forums so I am unsure if this is the right place to be posting this, but here it goes. I have been working on a drag spread sheet using OpenOffice Calc to predict where a potato will land when fired from a potato gun. I have gotten pretty far along, using: projectile mass (kg) launch angle (degrees) initial velocity (m/s) temperature (Fahrenheit) [this number is then converted to both Kelvin and Celsius] humidity (%) air pressure (InHg) barrel radius (m)[which is used to determine cross-sectional area] And projectile shape [which is used to determine Cd] After typing in all of this information into the corresponding cells the spread sheet then does all the math and displays the projectiles flight path. But what I am working on adding is wind, so I can add a 3rd, z axis, to my graph. I am not far along enough in my physics class to know how to do this, and I am not patient enough to wait to hear back from my physics professor on how to do this. I know using a potato is a problem on its own because there are too many variables to account for, so I am planing on having a more stable projectile printed for me out of abs plastic. Any help would be great. Here is a link where you can find my spreadsheet and see it for yourself: http://forum.openoffice.org/en/forum/viewtopic.php?f=9&t=60186 FYI: This is not a homework assignment, I started working on this my senior year of high school and now that I am in college I have the resources to finish it.