Big WW2 German guns shoot down and destroy everything

Hello hello how is everyone doing ? Ok i know the title may sound cartoonish but hear me out lads.I had an idea some months ago about big German guns shooting rocket propelled shells at all kinds of directions in a ww2 setup with the aim of defending the country or bombarding the enemy.
It all started when i learned that Germany was about to make a thing called Langer Gustav that was supposed to shoot 180km far.It was close to 500mms (800mms and with some changes ended being 500mms) big and would shoot rocket propelled shells across the British channel into London and other cities(Schwerer Gustav - Wikipedia go close to the bottom of the page to find it).It was destroyed by the RAF before it was fully assembled and or completed so it never saw action.So i thought to myself 180km is pretty darn impressive,could we make it shoot further ? What if we could make it bigger and at the same time able to shoot further ? What if we could hit far enough so that it could support ground armies the way standard artillery would ? What if we turned that kind of gun to the sky,gave it a shrapnel shell and had it shoot at bomber formations ? Wouldnt it make strategic bombing impossible after a certain point ? What if it could fire at ships ?
The hardest part would be increasing the range for the bombardment shell since creating a big shrapnel round for AA wouldnt be an issue and giving the thing a basic time fuse wouldnt really be a problem the way it was with smaller calibers.Even if it didnt set off on time the blast radius would be huge.In this scenario they could also push for contact fuses and develop them a bit earlier.But again how do you increase the range ? Well theres that thing called ramjet which was a tech that was thought of as early as ww1 and was supposed to increase the range of artillery.You can read all about it here Ramjet - Wikipedia or watch this short video .Finally the US a few years back made a functional 1000km range cannon from a far smaller caliber from the ones im proposing and that goes to show a lot The Army’s New 1000-Mile Cannon Will Match The Navy And Air Force's Ranged Strike Capabilities Leaked Army photos show they’re building a cannon that shoots over 1,000 miles and ‘Merica couldn’t be more excited .Ramjets require fuel to do their thing and the bigger the shell the more the fuel the more the flight time.Of course the bigger the shell the more it weighs but i recon that wouldnt create that many problems since we are going to be cutting some of its payload anyway to make room for the fuel.Of course the ramjet edition would mostly be there for land based targets since we dont have to shoot planes with something so sophisticated.
At this point i was thinking why not go even larger ? Why not go at 1500mm or 2000mm or hell go comically big like10kmms and shoot at your enemy with what would be a mixture between a ballistic missile and a very huge shell ? Well i dont know :) Maybe it wouldnt work,maybe it wouldnt be needed,but the only reason i propose this is because with more size and thus fuel you can go further,and with more size you could possibly strap some low yield nukes in there.What if this what if Germany made such monsters and opptained the range to hit American cities Moscow or the Urals ? What if they destroyed so many bombers and hurt so many allied pilots that they would no longer continiou to consider the air raid campaign an option ? Yes the US could make more planes but they couldnt replace men,at least not the way the Soviets did,without the outrage of the public.What if,even if they managed to land at Normany,got decimated on their way to the shore by these monsters ? A whole another realm of posibilities is open.
Many of the 400mm guns im talking about looked like this 40.6 cm SK C/34 gun - Wikipedia 38 cm SK C/34 naval gun - Wikipedia and belonged to the Atlantic wall so were not making something new really apart from the shells.I would also personally not make that many more than the ones the Germans officialy made.Guns like these could be placed around major cities or important industry and protect if from aerial targets and if the need arises ground ones too.When they aint forced to shoot at air they can bombard enemy cities,industry,millitary bases,airfields or anything for that matter.
Also could these guns in a Germany (or any nation for that matter) entering the cold war,be used as anti missile defense and a hybrid between ICBMS ? Since we cant shoot down a missile with a missile that easily why not throw a nuke shell at it and not even care for a direct hit ? The US tried something similar but with missiles and for AA purposes Continental Defense in the Eisenhower Era
I initially talked about all this here German mega defense - Axis History Forum .At first i had an ultra defensive Germany in mind but i no longer think that is necessarily needed.
One a final note one could say "Why not just make a missile and be done with it ?" I initially though of these guns firing shrapnel shells to planes while also being able to shoot ground targets from range but slowly but surely i saw a lot more going for it.Missiles are complex in their own way and require far more than just an advanced shell and a targeting computer.On the other hand huge gun facilities are not that mobile and make for large targets so they have their cons too but who said that ICMBs fired from silos can be that easily moved.In the end the huge guns could always have elevators for them to move bellow ground once theyre done.I think in the end they could cost less than ICBMs while also serving many more purposes and that could be the main thing going for them.You have an AA,an anti missile-ICMB system (for the more cold warshit modern era),a long range cruise missile payload like shell that can be fired almost anywhere you want,a small to medium yield nuke that can also be fired almost anywhere you want in one package.
I may add some more stuff to this post that i will remember latter on but i think this is pretty much all i can say.Its a fun topic and i thought why not share it ? Share any of your thoughts down bellow and lets have a nice discussion :)
 
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You are IMO missing the crucial point - accuracy.
Regardless of their doubtful usefulness such resource hogs will simply make the IIIrd Reich lose a year earlier.
Well as far as resources go we aint building many more guns than they actually built.If they had 50-60 400mm guns (im saying a random number) then well make them 70-80 or something.If in this scenario V2s are mostly out of the picture then we have substantial resources freed.For the most part though were just making advanced shells,the guns that are going to be firing them already exist.The 800-1000mm ones may not exist but even if we chose to make them i wouldnt go for more than 10-15.Just remember how many resources went to the Atlantic wall and in how many other way those could be repurposed.
Accuracy is something i havent really thought that much because well be shooting city or factory sized targets so i guess well be able to score some hits but honestly i dont know.What would you do to improve their accuracy if you were asked to find a way ?
In terms of usefulness they will definitely make the bombing campaign unbearable and with the ramjet shell im giving them the ability to hurt the enemy without them being able to retaliate.In this scenario Germanys air force would be better off to not even cross the channel and just sit and shoot down enemies above their homeland protecting the guns when and if the need arises.
 
Using 'Brandshrapnell' design for the shells would result in something like 10 thousand impact-fuzed subprojectiles being thrown at the bomber formation lmao.
 
Using 'Brandshrapnell' design for the shells would result in something like 10 thousand impact-fuzed subprojectiles being thrown at the bomber formation lmao.
It would indeed be devastating.
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With just 2.2cm of increase in gun size the rapture radius got doubled,now imagine if we go up to 400mms or more ;)
 
It would indeed be devastating.
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With just 2.2cm of increase in gun size the rapture radius got doubled,now imagine if we go up to 400mms or more ;)
Going to do some napkin maths here but assuming a supersonic release of 10 thousand subprojectiles with impact fuses, we end up with a length of at least a kilometer long (maybe even 2 kilometers or more) in a conical fashion.
That's...A big area.
 
Proven by Japanese not to work.
Different concept, Type 3 shells fuzed on bursting, Brandschrapnell was impact-fuzed and according to German's was worth around 3 normal flak shells each in performance.
Additionally Type 3 failed because of targeting issues (good luck hitting ANYTHING flying with main-caliber guns), not actual effectiveness of the projectiles themselves.
 
Different concept, Type 3 shells fuzed on bursting, Brandschrapnell was impact-fuzed and according to German's was worth around 3 normal flak shells each in performance.
Additionally Type 3 failed because of targeting issues (good luck hitting ANYTHING flying with main-caliber guns), not actual effectiveness of the projectiles themselves.
main-qimg-49daf4c6db0daa78b41e0e1da64f4e27.webp
You talking about this thing ?
 
What possible advantages do you get from having one stupidly big AA gun, as opposed to many small ones? It's a far less efficient way to distribute fire across the maximum area, and the ability to launch a shell 100km straight up is pretty much useless unless the Nazis are trying to destroy a time travelling ISS. Further... All that shit you fling into the sky is coming down some where. If you're trying to get any kind of decent spread pattern, you can't exactly rely on it all just going a long way down range "over there" somewhere, because if it is doing that then it's blasting along so fast and with so little dispersion that you basically get no area of effect. And whilst it might be kinda cool in a man-child kinda way to just completely delete whichever bomber is in the projectiles flight path, that circles us back around to the inefficiency of one big gun vs many small ones.

Plus, you didn't even consider the obvious and best possible projectile for such a weapon; a discarding sabot, rocket-assisted-bola net. A gigantic net made of carbon nanotubes, with small rockets facing 90° perpendicular to the flight path, so that after launch the protective sabot is discarded and the rockets immediately stretch the net to cover it's 4km^2 area, slicing through the delicate allied bombers and literally sweeping the survivors and pieces out of the sky.

If you have further enquiries I can assist. I also have plans for a tank immune to bolter fire and a perpetual motion machine requiring no more material than two cats and enough string to bind them.
 
What possible advantages do you get from having one stupidly big AA gun, as opposed to many small ones? It's a far less efficient way to distribute fire across the maximum area, and the ability to launch a shell 100km straight up is pretty much useless unless the Nazis are trying to destroy a time travelling ISS. Further... All that shit you fling into the sky is coming down some where. If you're trying to get any kind of decent spread pattern, you can't exactly rely on it all just going a long way down range "over there" somewhere, because if it is doing that then it's blasting along so fast and with so little dispersion that you basically get no area of effect. And whilst it might be kinda cool in a man-child kinda way to just completely delete whichever bomber is in the projectiles flight path, that circles us back around to the inefficiency of one big gun vs many small ones.

Plus, you didn't even consider the obvious and best possible projectile for such a weapon; a discarding sabot, rocket-assisted-bola net. A gigantic net made of carbon nanotubes, with small rockets facing 90° perpendicular to the flight path, so that after launch the protective sabot is discarded and the rockets immediately stretch the net to cover it's 4km^2 area, slicing through the delicate allied bombers and literally sweeping the survivors and pieces out of the sky.

If you have further enquiries I can assist. I also have plans for a tank immune to bolter fire and a perpetual motion machine requiring no more material than two cats and enough string to bind them.

Great ideas!
But,i agree that big AA canon is stupid idea.
If @Destroyer500 want something working,then german railgun/electromagnetic,not gun on rails/ would be better.
They even made one on 128mm AA gun chasis - it had good velocity,too/3-4km per second/
Only problem was,that one battery was stationary and need entire plant to work.

But,it could be done.
If you want something more mobile,then AA missiles would be ideal.They even made something like soviet SA-2 .
Certainly good for heavy bombers.
 
What possible advantages do you get from having one stupidly big AA gun, as opposed to many small ones? It's a far less efficient way to distribute fire across the maximum area, and the ability to launch a shell 100km straight up is pretty much useless unless the Nazis are trying to destroy a time travelling ISS. Further... All that shit you fling into the sky is coming down some where. If you're trying to get any kind of decent spread pattern, you can't exactly rely on it all just going a long way down range "over there" somewhere, because if it is doing that then it's blasting along so fast and with so little dispersion that you basically get no area of effect. And whilst it might be kinda cool in a man-child kinda way to just completely delete whichever bomber is in the projectiles flight path, that circles us back around to the inefficiency of one big gun vs many small ones.

Plus, you didn't even consider the obvious and best possible projectile for such a weapon; a discarding sabot, rocket-assisted-bola net. A gigantic net made of carbon nanotubes, with small rockets facing 90° perpendicular to the flight path, so that after launch the protective sabot is discarded and the rockets immediately stretch the net to cover it's 4km^2 area, slicing through the delicate allied bombers and literally sweeping the survivors and pieces out of the sky.

If you have further enquiries I can assist. I also have plans for a tank immune to bolter fire and a perpetual motion machine requiring no more material than two cats and enough string to bind them.
Thanks for taking the time to write all that
For starters i never said replace small flak or just use giant guns for everything.Most of these guns were put on the Atlantic wall and pretty much only fired a few times and then got captured.What i am proposing is a)a ramjet shell for bombardment of ground targets of any kind b)an AA shell that will act the same way the smaller flack do.What is the advantage of big flak ? Well thats very simple to answer,the Germans killed a bomber after firing thousands of rounds of 88s and hundreds of 128s and that because due to the tech they had they couldnt produce AA missiles en mass so that each missile is a bomber kill,they didnt care to create contact fuses and even if they did that doesnt bring the numbers close a handful per kill and because flak is VEEEEEEEEERY inaccurate.So what is my solution ? Instead of relying on thousands of shells per bomber just shoot a massive 400 one and kill multiple bombers with just one shell and thats with a near miss.In 1944 the average amount of rounds used to down a bomber
(4 engines) was :
16000 8,8cm (flak 36/37)
8500 8,8cm (flak 41)
6000 10,5 cm
3000 12,8cm
and i will be doing that with a handful of 400mm or bigger shells.Its not meant to replace flak all together but it aims to replace it concering high altitude bomber flaking as much as it can.This is only one of the utilities of the gun since the other is ground bombardment via the ramjet shell.I havent even proposed the creation of that many new guns,apart from the 800,800+ ones,but mostly a repurposing of them.Also ramjet technology did exist back then but noone cared to develop it enough.
The sabot idea sounds cool but WW2 Germany could never amass enough tungsten to use as flak.They didnt even have enough tungsten for tank round usage and projects like the panzer 3 with a 75mm gun firing an APDS-APCR sorta round were cancelled due to this (panzer 3 mit wafe 0725).Now all that changes if the sabots material is different.But the carbon nano tube idea may be doable in modern times but i dont think it would be in WW2.
But,i agree that big AA canon is stupid idea.
If @Destroyer500 want something working,then german railgun/electromagnetic,not gun on rails/ would be better.
They even made one on 128mm AA gun chasis - it had good velocity,too/3-4km per second/
Only problem was,that one battery was stationary and need entire plant to work.

But,it could be done.
If you want something more mobile,then AA missiles would be ideal.They even made something like soviet SA-2 .
Certainly good for heavy bombers.
Missiles could come into play but they needed time and they may have been viable only from mid-late 1943 onwards.Thats if they gave the SAM projects the highest priority from far earlier on.So yes they could certainly have working SAM,but from a latter stage and at that point it may give them a few more months or maybe even at year but thats only with everything else going perfectly.Also another question arises,how many could they built ? Because Germany didnt have that many rocket material for thousands of bombers.Unless you give most SAMs a small nuke and recreate the nuclear American missile i mention above.
Railguns are too high tech and even in modern times,where we have better tech and means to make them,i still dont like them due to requiring a ton of energy.Id rather have an ETC gun,a kinetic missile,a ramjet or something else really.
 
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Some information of the "Brandschrapnell" design which would negate the effects of larger projectiles having proportionally smaller explosions.
i282.photobucket.com/albums/kk272/dundas56/88cm-shell-shrapnel-flak.jpg
i282.photobucket.com/albums/kk272/dundas56/128cm-shell-shrapnel-fla.jpg
The 88mm variant had 72 whereas the 128mm variant had over 120.


These subprojectiles were impact fuzed and designed to burn violently with the goal of igniting fuel and causing structural damage.
 
Some information of the "Brandschrapnell" design which would negate the effects of larger projectiles having proportionally smaller explosions.
i282.photobucket.com/albums/kk272/dundas56/88cm-shell-shrapnel-flak.jpg
i282.photobucket.com/albums/kk272/dundas56/128cm-shell-shrapnel-fla.jpg
The 88mm variant had 72 whereas the 128mm variant had over 120.


These subprojectiles were impact fuzed and designed to burn violently with the goal of igniting fuel and causing structural damage.

Well yea that would definitely help a lot and make up for the smaller explosions.
The no1 thing going for big AA is the guarantee of a kill,most probably,due to the enormus blast radius and thus a far better ratio of shot shells vs shot down planes.The ratio i sent above,the one about 88,128 guns,is in the long run unacceptable.
It would also be really nice if we gave those big AA shells a way to leave tracers and also be either contact fused or have the fuse activate via radio from the ground bellow.But the remote detonation requires a tracer in order for the guy detonating it to have a good timming.The psychological effect of such a tracer would be significant.
My biggest question is how do i get to make the ramjet shell more accurate
 
As i said in my previous post accuracy of said guns on ground target is my main concern.With such high speeds and at such big ranges well be shooting a slight deviation at some point would lead in missing the target by a large margin.Even in modern times artillery is pretty inaccurate unless some kind of shell like Excalibur M982 is used . So i thought to myself,is there a way to make somewhat guided munitions in a ww2 scenario ? Excalibur uses GPS which of course is not an option.If we can make and fit proximity fuses in ww2 https://en.wikipedia.org/wiki/Proximity_fuzethen then that means that we can make electronics that survive massive amounts of Gs.Why cant we then make a radar guided shell somehow ? If what ill describe next is even remotely possible,we could use a certain frequency to guide the shell to a certain location from which that said frequency is being emitted sort of like a beacon "summoning" the shell.The wont suddenly hit with pin point accuracy but at least we will be able to secure a higher amount of hits on our targets and also reduce their deviation by a lot.
 
Okay, no. Only the United States managed to design a usable proximity fuse during WWII, and that is an incredibly simple form of radar fuse, little more than a crude Doppler rangefinder.

What you're describing is full-up semi-active radar homing, the technology used in Falcon and Sparrow air-to-air missiles, and no one had a functional version of that until fully a decade after WWII. Moreover, those SARH guidance systems were for missiles, not cannon shells; the firing of a cannon shell is an extremely violent shock and it is *extremely* difficult to design electronics capable of surviving that shock in functional condition. This was actually the most difficult challenge in the development of proximity fuse technology, and is *specifically* where both British and German efforts failed. Moreover, SARH guidance is not standalone; it requires an actual guidance platform carrying a compatible radar system, which is another thing that does not exist for decades later.



So i thought to myself 180km is pretty darn impressive,could we make it shoot further ? What if we could make it bigger and at the same time able to shoot further ? What if we could hit far enough so that it could support ground armies the way standard artillery would ? What if we turned that kind of gun to the sky,gave it a shrapnel shell and had it shoot at bomber formations ? Wouldnt it make strategic bombing impossible after a certain point ? What if it could fire at ships ?


To answer your questions straight up:

1. Yes, you can make even bigger siege cannons. The amount of resources required to create, support, and operate them becomes exponentially greater and greater. In addition, if they are designed for extreme range, they trade off payload. The "Paris Gun" was an absolutely enormous monster of a siege gun whose barrel was seventy meters long and which could fire to 130 kilometers range using only WWI technology; yet it was "only" a 238mm bore and the shell just a little over one hundred kilograms. In practical terms, such extreme-range guns were little more than propaganda gimmicks.

2. No, they can't be used to support ground armies. That is why the very large guns were classified as siege artillery, a category separate from ordinary heavy artillery. The lack of mobility and massive amounts of infrastructure required to operate them makes it impossible to use them tactically.

3. An anti-aircraft mounting for a siege cannon would be even more utterly enormous than the mountings for them already were, in order to support the massively heavy and long barrel at high elevations. They would be completely ineffective in the anti-aircraft role, due to their sheer size making it impossible to traverse and elevate them quickly enough to actually track an aircraft, as well as their rate of fire being far too low. An anti-aircraft gun of "normal" siege caliber would literally be lucky to get off two shots during the course of an entire battle; an even larger one such as you suggest would take so long to load even one shot that it would be impossible to use against air attack.

4. Firing at ships would require accuracy that is not possible without modern-style guided ammunition, which is impossible to make with WWII technology.
 
I once read of AA 210 and 150mm gun prototypes made by germans,but all i knew is that they existed.
 

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