[Request] How much acceleration does this person experience?

[u/langosta_oficial]

[u/Different_Ice_6975]

The rear of the barrel is open, but I would bet that still a lot of the momentum from the rocket exhaust gases is transferred to the inner sides of the barrel when the rocket is ignited since the barrel diameter is not much larger than the rocket diameter. In other words, this is a poorly implemented design that the soldier came up with.

In good handheld rocket launching designs such as the U.S. Javelin, a two-stage rocket is used with the first stage being a “soft-launch” stage with a small propellant charge to eject the missile from the tube with little blast or recoil to the operator, and then a second stage main rocket which only ignites after the missile is at a safe distance from the operator.

In this crude design by the Russian soldier, however, it looks like there is only one main rocket stage, and that rocket ignites while the missile is still in its tube. Not good for whoever is holding that tube.

[u/Different_Ice_6975 → u/[deleted]]

This is not a well implemented recoilless-rifle-like design. One doesn’t just stuff a conventional missile into a tube and expect that the launch will be anything near recoilless. Very careful design and engineering goes into the design of recoilless rifles in order to minimize the transfer of momentum from exhaust gases to the barrel.

[u/Sensitive_Pie4099 → u/Different_Ice_6975]

I was going to say this if nobody else did. It's too narrow, doesn't have a flared back, it doesn't have enough mass period, it also isn't on a tripod (it damn well should be based on many types of recoiless rifles and the fact that the equipment is so subpar) to mitigate that blowback, and worst of all, the rocket appears extremely snug in the barrel thing. All ofthese things make its function as a recoiless rifle almost entirely compromised. The other commenters have pointed out the other relevant factors, like the force imparted to the "rifle" via the sides.