2 ms·
Curious...going big picture about ballistic projectiles for a moment...what about a hollow-all-the-way-through projectile shaped like a jet engine air intake wi
by graderjs 5y ago
Curious...going big picture about ballistic projectiles for a moment...what about a hollow-all-the-way-through projectile shaped like a jet engine air intake with "rifling" on the inner side to turn airflow, spiraling the incoming air from the wider "mouth" of the bullet toward a tiny "nozzle" at the rear of the bullet, through which this air is expelled. I'm not physicist-enough to know if this will do anything, but is this in anyway a plausible idea...or just terrible? Happy to learn.
- chipsa 5y agoI think what you're effectively looking at is a rifled (Foster) slug. Turns out the rifling on the slug doesn't do much. The majority of the stabilizing effect on a Foster slug is from the fact that the center of gravity is well ahead of the center of pressure. Having an actual hollow all the way through the slug with rifling would probably have increased air resistance compared to having the rifling on the outside, while rifling on the outside would have better ability to apply torque to the projectile. So knowing that rifling on the outside doesn't work well, we can estimate rifling on the inside would do even worse.
- graderjs 5y agoAwesome, thanks! Well was worth a try.. Heh