[NotInControl]

No problem,

I will try to post some datasets from my model later so that you can compare more than just one data point.

In terms of design, it will be hard to ignore drag and obtain meaningful numbers. The ball is relatively large in size, and if you reduce your Cd in your model to 0, you should be able to see the numbers reported for the "No Drag" case.

At shallow launch angles the No drag model will report the ball traveling a lot further then it will in reality.

As for spin, the magnus effect on a ball is very real, and if you plan to put significant spin on the ball then you should at least consider modeling it if your model will be used to help narrow your design parameters.

For my case all the ideas my team has come up with so far are of the type of sling-shot, or catapult launcher, and in most cases will not impart spin on the ball.

For any object traveling though a fluid, spin does offer greater stability which leads to better accuracy. So without spin repeatability will decrease. By how much I can not say cause we are still testing the flight behavior of this ball on our prototypes.


Hope that helps,
Kevin