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HSQ 02-20-2014 10:55 PM

Hey everyone! I have an interesting idea that not necessarily practical, but I'd like to discuss with yall just for fun.

1. a hypothetical free floating barrel that could revolve around its own axis freely.

2. a hypothetical compensator with unique venting holes that they are lined up with a certain angle to the axis of the barrel, forming a shape of vortex.

Now, upon firing, part of the propellant gas escapes through the compensator and creates a gas vortex which causing the whole barrel spin around its central axis. Since we used a part of that propellant energy spinning the barrel, we should feel less energy coming back towards the shoulder, thus, less recoil.

we all know that give a bullet a lil spin can stabilize it traveling through the air, now would a spinning barrel give you a more stable handling while firing automatically?

Tell me what do you think about it.

danf_fl 02-20-2014 11:06 PM

Welcome to our forum.
We have a section called "Introductions". Stop in there and say "Hi".

Now let's get about your idea.
Please understand that there is a good possibility that the BATF is reading this answer at the same time you do.

There would be problems with extraction and ejection of the spent round. The lands and grooves in a barrel does a good job of stabilizing a bullet now.

JonM 02-20-2014 11:08 PM

If you were able to do a barrel on a rotating ring of bearings you would never be able to zero it as the poi would change everytime it spun on the axis. On top of that to make it tight enough to the bearings to prevent it flopping around it either wouldn't spin due to friction or you wouldn't be able to pick it up due the weight of the superstructure and bearings needed to support it.

Why not just get a surefire muzzle brake which already is one of the best out there for reducing or eliminating muzzle climb....

HSQ 02-20-2014 11:38 PM

Hi! thank you for welcoming me!
I know it would be a problem for extraction and ejection, and possibly a problem for every other step along the cycle.
and yes the rifling does a very good job stabilizing a bullet, but I was asking would a spinning barrel give a better handling on the gun.

HSQ 02-21-2014 12:05 AM

I agree that the friction could prevent it from spinning when you make the bearing tight enough.
I dont think weight is really a problem, we have multi barrel gatling gun, and we only have 1 barrel here.

now about the POI, say the gun is carefully measured n' designed using a certain round, so the barrel rotate only 360' on each round, that way the barrel would start to spin only after the bullet leaves the barrel, and after 360 degrees of rotation, it stops and chambers a new round. What would be the POI then?

This idea was actually from an very old patent mechanism I found a while ago on google, the original idea was cut venting holes on the barrel to help it spin, but that would decrease velocity.

c3shooter 02-21-2014 12:11 AM

If the barrel spun about it's axis, it would have some of the effect of a gyro. When a gyro is spinning, a push applied to it is redirected at a right angle to the push.

Since the push is backwards, 90 degrees to that would be left/right or up/down. Meaning your recoil could go SIDEWAYS. That could get ugly...

stoneam2006 02-21-2014 12:14 AM

Would the barrel spinning the same way as rifling or againt it make a difference?

c3shooter 02-21-2014 12:25 AM

Does it matter in which direction you spin a gyro?

JonM 02-21-2014 01:08 AM

Well to stabilize a 308 the barrel would have to hit something north of 200,000 rpm...

A dremel tool which is pretty speedy barely hits 35,000 rpm...

A 20mm vulcan spins at About 7000 rpm...

An average car tire rotates at around 800 rpm at 60 mph...

I doubt you could put enough vents in a barrel to get it going that fast. I doubt you could do it using a turbo jet engine for propulsion.

Rifling is a very simple cheap and elegant solution to stabilizing projectiles. One of the main reasons we aren't using rail guns is, there is no way to effectively stabilize the projectile at range

robocop10mm 02-21-2014 05:32 AM

If the whole set up was loose enough to spin freely from the gas "vortex" it would spin freely enough that the barrel would spin instead of the bullet. Accuracy would be non-existant

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