Dread Gun

Welcome to 3 months ago.
Nice of you to show up.
PS: Check the comments. Many people have said the same thing, and backed it up with evidence.

(Post 2) So, you have to take that remaining projectile that is going full speed the wrong way and turn it around. That will be two recoils. One to "stop", then another to get going in the right direction.

Then there's the issue of power. With all the "kindest" values clamed with this weapon, when firing, it will have a power requirement of 500 000W. That's right... half a megawatt, or 680 horsepower. And this is still assuming perfect power conversion and no friction losses.

(Post 3) Then there are the gyroforces making it impossible to aim; the extremely poor ballistic coefficient of spherical ammunition which makes the DREAD as harmless as BB gun for ranges over 300 meters; the utter stupidity of having a flywheel spinning at Mach 3 (silent? not really) at the edges waiting to fracture like an omnidirectional claymore when hit by enemy fire... and finally: the complete lack of credible sources for this.

In short: It's a hoax.

Sorry, you're wrong. Momentum conservation is a fundamental law of the universe.

When you let go of it, you feel the same backward pressure that the rock feels forward. Because the rock is small, the velocity involved is small, and you are large, you don't notice it. Momentum = mass times velocity.

But try standing on a perfectly oiled roller coaster and you'll find you start moving backward a little when the rock leaves the sling.

the reason there is recoil in a firearm is because the gas pushes against the back of the bullet and the bolt face. this weapon uses a different kind of energy. the ball is pushing against the outside of the rotor and then it is simply released. the only forces are centrifugal. if there is anything resembling recoil it would be from the balls on the opposite side not being counterbalanced once the balls are released.

Nope. Every force in the universe operates on two objects at once, equally, but in opposite directions. This law is absolutely fundamental and can never be violated. Also, "centrifugal force", in the sense in which you are using it, is a myth. The object is simply accelerated forward during the part of the rotation in which the end of the rotor is moving forward, and is then released. The device turning the rotor is accelerated backward at the same time as it pushes against the projectile.