Ontario Hunter
AH legend
The better analogy is a vehicle's transmission. When it shifts gears, the same amount of energy (RPMs) produces more velocity because the vehicle is already in motion and the initial at rest gravity has been overcome once it has started moving. With the double fire, the first barrel fires starting the recoil velocity and the second barrel firing immediately after but before recoil velocity even starts to subside = additional velocity. Remember, recoil velocity is typically measured with the gun in the starting gate when the gun is fired (think horse racing). That first fifty yards around the track is the slowest. But the next quarter mile is probably the fastest.With respect - not understanding something doesn't invalidate it.
Simple analogy - a twin engined jet aircraft: the velocity of gases out of the 'engine' is the same for both engines when running. Gas velocity out of the engines provides thrust, which is what makes the jet accelerate and sustains velocity during flight. Why does the plane need both engines to take off if the gas velocity from a single engine (half the thrust) makes the plane travel at the same velocity (or accelerate at the same rate) according to you? Your theory, as best I can decipher, is that one jet engine would accelerate the plane at the same rate as two, for the same given engine settings.
How does this work - how does 'recoil' go up if the velocity of the recoiling gun is unchanged?
Twice as much force is heading out of the barrels with a simultaneous discharge - Newtons Laws tell us that twice as much force must be experience in an equal and opposite direction (recoil) compared to a single discharge.
The force in this context is acceleration. If acceleration is doubled, does velocity remain the same?
(mass of the recoiling rifle is assumed constant in both scenarios)
Does recoil velocity double during a double fire? That might be possible if timing was perfect, i.e. the second barrel fired exactly at the peak of the first barrel's recoil. I submit with 500gr cartridges at 2200 fps, it would be very difficult for a normal person to stay upright if the second barrel fired exactly at the peak recoil of first barrel. But the grouping of those two bullets would not be remotely close even at 25 yards.