You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser.
Help Support The Rocketry Forum:
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, and others.
-
Z
I have a question,
what are example of rocket used progressive,regressive and neutral propellant grains?
when the above 3 propellant will be used?
