4 ms·
A smooth bore gun (like the one in tanks) with a very long barrel will work for moon projectiles as well.
by pranavdotexe 6y ago
A smooth bore gun (like the one in tanks) with a very long barrel will work for moon projectiles as well.
- robin_reala 6y agoSee also: https://en.wikipedia.org/wiki/Super_High_Altitude_Research_Project https://en.wikipedia.org/wiki/Super_High_Altitude_Research_P...