- Dec 17, 2012
- Reaction score
Hi all; I have a question about static hole sizing. I've generally launched 2" to 5" rockets and the formulas for the static port diameter for four holes always seemed logical and correct. I'm prepping a 7.5" rocket (12" long bay) and when I ran the calculations from various sources and programs the results were all over the place; anywhere from .290" to .500". That's a huge variable. The ports will be about 3.5 diameters back from the nose cone and the rocket will be average speed about 10 Gs max on boost. I'd be interesting in hearing from anyone who has a remotely similar rocket what size ports they used successfully. .500" seems massive and concerns me for turbulent sampling. THANKS FOR ANY HELP!!!