Oh my goodness this has grown into a bit of a long post. Don't say you weren't warned!
Let's take a look at this gizmo from a Soviet perspective.There's some weird and wonderful new weapon we just got off the americans.
Yes that's right.
It's NOT INVENTED HERE.
In 1942 the Soviets did not seem to suffer much from NIH. They took, and used, just about anything that was a productive weapon of war. I mean, they took most of the production run of the Tetrarch light tank! Oh fer the love of … if they'd use THAT they'd use anything.
The … rounds are some sort of fancy rocket. A tiddly little rocket.
We're not convinced these things are going to be able to take out German armour.
At this time the Soviets were very enthusiastic about rocket weapons. Let us not forget that the Soviets were pioneers of rocket projectiles in the inter-war period.
The RS-82 rocket (Photo by George Shuklin – Own work, CC BY-SA 1.0,
linkThe RS-82 was an aerial 3.2" rocket (82mm), while the RS-132 was a similar but larger (132mm) rocket. The RS-82 was first tested in 1929, and both were widely used in WW2 after seeing initial combat use at Khalkhin Gol against the Japanese and in the Winter War against Finland. Thee were anti-tank versions of both (the BRS-82 and -132). Derivatives of these (the M-8 and the M-13) were used for ground-based rocket artillery (in the BM-8 and BM-13 "Katyusha" salvo launchers).
So the bazooka should well have found very little resistance among the Soviets … if it had been a useful weapon to them at all. But given the particulars of the first M1 units, it was not.
Out of the myriad of combatant nations taking place in WWII, very few actually developed man-portable anti-tank rockets.
Very true. Perhaps even among the more avid enthusiasts, this factor is often missed.
It was not obvious that rocket propulsion was going to be a productive path to a direct-fire weapon that could be used by an individual soldier. And there were MANY ways to approach infantry AT weapons.
Only the Germans and the Americans completed working models of rocket systems in WW2. And even then, the Germans were pretty much covering all bases, and did not use rocket propulsion for either their early, or their most numerically important, infantry AT weapons.
Infantry AT weapons fall into about 7 broad categories:
1) Hand-placed: Almost all nations had placed charges of some form. These were more commonly available to and used by engineering troops then the common rifleman, but in some armies (Romania, for example) the ubiquitous satchel-charge remained the primary infantry AT weapon. The Germans pioneered and distributed their magnetic AT hand-charge, and assumed their opponents would, but they didn't.
2) Hand-thrown: Several nations toyed with a variety of hand-thrown AT weapons. The British "gammon" bomb (aka: "sticky bomb") was initially intended to be thrown, although it's likelyhood of sticking when thrown was never much accepted. The Germans had a variety of thrown items, including twin charges connected by rope, to be thrown in the hope of looping over/around a tank's main gun barrel before detonation, and some gas grenades (with irritant gasses rather than deadly gasses) to degrade enemy tank crew fighting abilities and even perhaps cause them to bail out of their tanks. The Soviets really pushed this approach to a productive end point with their RPG-43 and RPG-6 contact-fuzed drogue-tailed hollow-charge grenades. They also mass-produced ignition fuzes that could be stuck to the sides of bottles, which allowed the ubiquitous "Molotov's cocktail" to become somewhat more reliable in combat.
3) Rifle-Grenades: Almost all nations had them, but only a few made productive AT rifle grenades. The British and Americans had useful models. But the problem was that firing grenades from a rifle was very hard on both the rifle and the rifleman. Most armies that really liked rifle-grenades, like the French, had a soldier per squad who was trained as the grenadier. His rifle would be just about useless for accurate rifle-fire after any amount of practice with the rifle grenades. And for whatever reasons they (the French) never managed a useful AT rifle grenade. The Germans tried this route and were not too keen on it for their rifles, but seem to have developed their flare-pistols into a sort of man-portable AT launcher, although the usefulness is much to be doubted.
4) Anti-tank rifles: This was actually the first infantry AT concept, dating back to WW1. In early WW2 several nations had them. There were several calibers, ranging from 7.92mm up to 20mm. Most of the 20mm models seem to have slipped beyond the point of being single-soldier man-portable. The Soviets seem to have hit on the balance point with their 14.5mm ATRs … penetration power as good (or better) than many of the 20mm models, but usable by a single soldier (although having a second to tote the ammo made a big difference).
That said, once tank armor advanced past about 30mm, ATRs were of dubious utility. The Russian 14.5s managed to stay relevant a bit longer due to their superior penetration, making them a threat from the flanks to German tanks up through the early Panthers, but for the most part their value came to be harassing fire vs. tanks, and lethal fire on less-than-tank targets such as halftracks, armored cars, and MG emplacements (they penetrate a LOT of sandbag!).
5) Low-pressure guns: Several nations when this route for infantry AT weapons. If you don't rely on velocity for damage at the other end, you don't need to fire your projectile from a big heavy barrel. So it is possible to make a gun that fires something out to a few hundred yards/meters that does not weigh too much for man-packing. Some of these devices might best be categorized as direct-fire mortars. Big, slow projectiles, and a bit of a dubious proposition for hitting anything smaller than a barn at 100m. The British PIAT falls into this category. My own personal favorite is the Russian Ampulomet (more about that later). The Germans, who went every route, were there with a fairly credible device in their Pupchen. But they carried the concept a bit far, giving the gunner a seat and a bit of a shield, and so it became a bit too big to be individually man-portable (sized more like a Russian MG or an Italian 45mm mortar). The warhead, through, was effective enough, and provided the base upon which the Panzerschrek could be built (once the idea of a rocket-propelled projectile was demonstrated to them via the US Bazooka).
6) Rocket projector: There are really only TWO in the WW2 timeframe: the bazooka and the panzershreck. It's hard to do. You want it fired by a soldier from his shoulder. The tube stabilizes the rocket until it is up to a useful speed to be aerodynamically stabilized. But too long of a tube can be awkward and heavy. If you put in too little propellant, you won't get a useful payload out to a useful range. But you can't put in too much propellant. If a rocket motor is still in full burn when the rocket leaves the launch tube, you will fry the hapless gunner. If it burns too fast, it will explode rather than propel. And then there is the question of how you ignite the engine … percussion is not a likely mechanism, if for no other reason than that any mechanical striking mechanism requires a more heavily built system than you might want in your rocket launcher (given the length of the tube). It takes a precise balance and very tight manufacturing quality control to make a consistently useful shoulder-fired rocket system.
7) Recoilless launcher: This, or some hybrid of this, was the most popular approach in the post-war period. The Panzerfaust led the way for one branch, but several nations (including the Germans) went the other path of shoulder-fired RCLs with barrels. Make the tube strong enough to be a gun (rather than a rocket launcher). If you want it to be man-portable, make the tube narrow enough that the weight is not such a big problem. If you can accept shorter range and less accuracy, make an out-sized warhead at the end of the tube … the faster acceleration from a gun-shot (vs. a rocket) does not require the projectile to be stabilized in a long tube as it accelerates. If you want longer range and more accuracy, make a rifled barrel for a smaller projectile.
Proper patriotic communist frontoviks use incendiary bottles, filled with flammable liquid and with ignitors on their side, to defend their Soviet Motherland from the tanks of the fascist invaders.
Not only thus, comrade polkovenic! Let us not forget the magnificent self-igniting ampules of the ampulomet!
Ampulomet team in action in Stalingrad, 1942.
(From Bob Mackenzie's collection)
A Russian original, much like the famed "Bates Bottle-Thrower" of 1940 British fame. This 127mm projector used a 12-gauge shotgun blank to launch a 125mm glass "ampule" out to a distance of 400m, although it's ability to hit the ocean from a boat is much in question. The ampule would break upon striking a hard target (so don't miss, Ivan!). The contents were a chemical liquid with a significant quantity of white phosphorous, which would ignite on exposure to the air and burn at up to 1,000 degrees C.
This was put into service in 1941, and served as a principal infantry AT weapon in some numbers through 1942, when it was withdrawn from service for being somewhat less than fully useful. I mean, who wouldn't want to face down the most highly-trained and efficient tank force in the world with a weapon where you load from BOTH the muzzle (projectile) and breach (cartridge), which fires a fragile bowling ball at your target with about as much accuracy as a 14th century siege gun … if it doesn't create a firestorm in your face when you fire it, that is.
You see, it may be clear what the good ideas were in retrospect, but there were LOTS of ideas tried to get there.