>The Blish lock is a breech locking mechanism designed by John Bell Blish based upon his assumption that under extreme pressures, certain dissimilar metals would resist movement with a force greater than friction laws would predict.
>In modern engineering terminology, it is an extreme manifestation of what is now called static friction, or stiction.
>His locking mechanism was used first in the Thompson submachine gun.
>Nowadays it is discredited as a useful firearm operating principle, due to its almost nonexistent effects on the operation and functioning of a firearm;
>because of that, firearms which theoretically employed it operate not by the supposed Blish lock principle,
>but, in fact, by blowback operation.
so in practice it's simple blowback just with a 2 pound hunk of machined bronze in it causing it to cost twice as much
What are some other discredited firearms mechanics?
>What are some other discredited firearms mechanics?
short rifles and shotguns being mo’ dangerous
Aw lawd theenk of dem keeeiids!!
"Anular delay" is also nonsense. The principle is that by cutting a larger diameter at the front of the chamber, fired brass would expand into it causing the brass to keep the chamber sealed until pressure lowers to a safe level whereby the brass will be compressed by the smaller, normal diameter rear section of the chamber and be extracted by the remaining pressure and extractor. The Detonics Pocket 9 here supposedly uses this mechanism. It stings like a heckin son of a gun because the anus doesn't work, it just functions like a blowback in 9mm instead of .380.
I'm also reminded of the MAB P15/PA15 which has a rotating barrel that supposedly locks the action but actually doesn't because it starts un-rotating immediately with no dwell time like a true rotating barrel locked breech such as the Beretta PX4 or Boberg XR9. The MAB consequently is also extremely brisk recoiling and feels like a direct blowback 9mm, despite the very heavy all-steel construction.
It strikes me that it's going to be taking some of the edge off straight blowback, but the amount is going to be very dependent on the specific ammo you're using. The sort of thing that might work okay for a military, but a utter shitshow on the Johnny moron market.
Unless of course the ring is literally right at the front of the chamber, in which case the brass has probably fricking moved past it by the time it's expanded.
It's hard to get a pic in there but the sphincter is at the very forward edge of the case, like the first 1-2mm. I can't imagine it doing anything in that spot at least, the bullet is seated much farther than that into the brass. It wouldn't experience any pressure at all until the bullet fully leaves the case.
Shoot it's been a long time since I shot that thing and I may not even have looked at the brass if I didn't know about the chamber gimmick before hand. I dunno, but the memory of hand sting is strong lol
Yeah that's just fricking moronic. Put two or three of them evenly spaced from the middle of the chamber wall and you might be going somewhere.
>It wouldn't experience any pressure at all until the bullet fully leaves the case.
the case ballons against the chamber wall under pressure. unless there is a perfect fit, which there isn't, the case will form a lip. I'm pretty sure the force needed to swage the lip back is negligible though.
The problem is it's started moving slightly backwards before the pressure's even peaked. There's nothing holding it closed but a spring.
Burt, does the annular delay cause a ring-shaped bulge in the ejected brass? If it does, it therefore must be absorbing some energy, no?
>cause a ring-shaped bulge in the ejected brass
Shouldn't the brass be reformed as it passes through the rest of the (normally specced) chamber?
Seecamps have a divot dremeled into the side of the chamber for supposedly the same reason. Another reason I hate those things.
Get it rechambered for .960
annulus, not anus. If the anus doesn't work your gun needs a colostomy bag.
I don't really know shit about Detonics, but I'm salty at them for never making pic related.
44 magnum break top lol ya rite, they must have found out pretty quick that's spooky. I guess the .357 didn't pan out either
Google patent number 4539771, they had an idea to make a sort of self-correcting locking latch. Kinda neat idea, and given the weight of that thing I think it probably really would have held up to factory .44 and even some spicy .357. However, reloaded .44 beyond SAAMI spec, probably not, especially over a lifetime. I certainly would have liked to have seen it, the idea for caliber conversion is neato.
1v1 me in wildy blish
>blish locks you
nothing personnel, kid
>2 pound
are you fricking moronic?
that's like 1-2oz of metal
Dog rapist
proof?
As a furhomosexual, tripBlack person and general homosexual you are presumed to be a dog rapist and the burden is on you to rebutt the presumption.
>nothing
yep, exactly lol
>as a redditor i am so amuse by this lore!
go back and reply again
>go back
Lol no thanks people get upset on reddit when I make fun of moronic autists who can't keep their hands off those stupid sexy border collies.
I saw you fricking a dog against its will
no you didn't?
seethe and reply again
Yeah, I did
Just because you didn't see me doesn't mean I didn't see you, you took that little dog, probably not more than 6 months old out into the sands and raped it.
I picked you up on thermals before moving in closer, saw what you did to that thing you sick frick, I should have shot you there and then but moronic me didn't bring ammo.
You raped that dog, then you killed it to hide your shame or maybe you just like that, I don't know but you are one fricked up dude and really should seek help.
If I ever catch you out there again I will shoot you and I will hide your body. You won't be found and you won't ever harm another animal again.
We tracked him easy
I must admit I am a fan of this BigC dog fricker /k/ lore.
For some reason it never fails to bring a smile to my face.
You do know bigC, mr crummy, mr crummy paws, and etc are all just garand thumb shit posting and baiting new gays right?
>Baiting newbies
Brohim I am fricking ancient.
I come from a time before, when "zoomers" weren't even a thing.
I'm like /k/'s grey-bearded wandering wizard uncle.
I drift away from the moronic finger pointing shit throwing baboon pit for years at a time, then return for a few months when I have some questions only an anon autist could answer, only to find my old acquaintances are gone or in actual prison, replaced by new morons.
This dogfricker is not known to me.
Two years is a long time to be gone, but in the past three months I've seen many references to his amatory canine nature, too many to count.
Dogfricker he is, and dogfricker he shall be.
you're not alone o7
I accept this as my new reality anytime I see BigC pop up from here on. Btw mr crummy, you shoulda put the D in the Deer, not the Dog ¯_(ツ)_/¯
Explain to me why the blish lock doesn’t make the thompson roller delayed. Yeah the friction thing is bullshit but it still has to push the lock aside before the action can open. isn’t this mechanically very similar to the roller delays that give the MP5 such a good reputation?
>Explain to me why the blish lock doesn’t make the thompson roller delayed
It doesn't have rollers
No, but it has a wedge that has to move to the side before the bolt can move back, thus delaying blowback
That would make it wedge delayed.
Roller delayed bolt is not friction bolt. Its inertia bolt like straight blow back. Only it uses mechanical link via rollers to accelerate bolt so it may reduce bolt weight. because bolt impulse = M*V
The blish lock actually slowed down the rate of fire on the M1928's compared tot he later M1/M1A1's - which had a simplified and heavier bolt (which usually results in a lower ROF)
You don't know what roller delayed blowback is.
cry more?
Black person ass b***h frick b***h ass Black person
>he's losing his mind
kek
Spokane like a true b***h ass Black person
absolutely seething
This homie malding so hard he'll give me endless (you)s but not get a single one out of me, go frick your dog some more
L M A O
M
A
O
reply again moron, i was too busy eating MREs and having a fire in the snow
More like too busy fricking your dog
hey now leave po'dunk spokane out of it
Why were early SMGs so shit?
When I first read the term "telescopic bolt", I thought it was something fanciful, like a segmented bolt in which the parts concentrically intersected one another during operation, not that it was referring to every slide equipped pistol ever made.
>When I first read the term "telescopic bolt", I thought it was something fanciful, like a segmented bolt
I thought the exact same thing when I first heard of "telescoping ammunition", imagine my disappointment when it's literally just "there's propellent next to the projectile not just behind it"
Ya know, one thing I've noticed about this tripgay Black person is he absolutely relies upon his self image of everyone SEETHING over him. He can't fathom that people just kinda think he's pathetic and/or funny.
Anyways I'll collect my extremely prompt (you) from him because he spams that F5 key.
By most accounts it does work, but since you can only buy a semi-auto version it doesn't matter.
It's my understanding that the low bore axis and heavy weight have a lot more to do with the recoil characteristics than the weird funky action
If that were true it would shoot better in semi.
You can't defeat physics, bro. Transfer of momentum is always equal and opposite. So the recoil force is always opposite the direction of the bullet (backward).
You know anon, I could have gone my whole life without seeing that and been perfectly happy
A visual aid helps to elucidate talking points.
It's your own fault for clicking on a file titled "Bowel_Evisceration.jpg"
So did he not like test the mechanism to make sure it helped first
It's not like he had some sort of high speed camera or anything
Testing would had been as simple as making the lock out of the same material. Luckily for him he got the first-mover advantage into the American submachine gun market so that fact that he was making shit up and couldn't be bothered to do a basic sanity check didn't hurt him much. He likely came up with the geometry of his lock by randomly adjusting dimensions until it worked too. It could even had been a marketing stunt, in that he knew it didn't do anything, but pretended it did regardless.
You're like terminally online Bighomosexual you are obsessed with the opinions of people here lmao stop trying to fool yourself. You fricking will come back to threads days later just to check if someone mentioned you.
didn't read bro reply again
hey didn't read the rest of this thread but you kind of come off as a Black person lol just a heads up
ok?
reply again i don't care
yeah i fricked ur mom
idk bro my mom may be a b***h but she's not a dog, big press X on that one
Lmao I bet he just replied to me too like an obsessed moron, have him filtered.
>i have him filtered
>but imma keep replying to him
lol this is gold, go again
How was that bowel eviserated? A hernia?
Presumably, it was a colostomy complication.
I have no idea why it looks like his abdominal wall has no structure.
It wasn't simple blowback, it was angular delayed blowback.
The H bar acted on two cuts in the receiver to delay the opening of the action until the lugs cleared the angular cut cam track.
It just wasn't a locked breech. It was closer to the HK roller delay.
Lmao this Black folk really spent 8-12 hours replying to people obsessively how pathetic
Obsession with public image and general narcissism are common traits in homosexuals
Reply again
I wouldn't call blish lock simple blowback, it did have a delaying factor and this was proven by the M1's (simple blowbacks) had a much higher firerate than the M1928 or other earlier variants of the thompson which had the blish lock.
It was delayed but just not how blish thought it would.
Pre-Blish 1919 Thompson was ~1200rpm
range was from 1100-1500rpm
Blish 1921 Thompson -800rpm
Blish M1928 ~700-800rpm
The 1928 series will introduce a new/heavier duty actuator than the 1921....eventually - early 1928's were 1921 overstamps with very minor changes
Blish M1928 Navy - 600rpm
It's important to note here that they achieved this ROF with the new actuator design and specifically with a much heavier recoil spring
Blish 1928A1 ~700rpm
Most produced variant of the Thompson
Non-Blish guns - straight blowback
The M1 and M1A1 had vastly simplified bolts, that were heavier than all earlier variants. Both variants utilized a heavier spring set which on paper was supposed to mimic the 1928 Navy and achieve 600rpm
Post-Blish M1 Thompson - 600-700rpm
3rd most produced Thompson variant
Simplified bolt with free float firing pin
Due to the heavier spring wearing out the M1's rate of fire could jump to ~850rpm approaching 900
Non Blish M1A1 - 600-700rpm 2nd most produced thompson
The final thompson did away with the free floating firing pin for a fixed one and had a simplified hammer, largely resolving the ROF jump with the M1.
To concur:
The blish is responsible for lowering the rate of fire and provides some level of moronation to the 1921, 1928, and 1928A1's with their light bolt design.
Note how the principle difference between the 1919 Thompson pushing over ~1200rpm vs the 1921's 800rpm is the presence of the Blish lock in the latter.
The Blish lock allowed for a lighter operating mass. The M1928A1 is only nominally heavier than the M1A1 yet the M1928A1 has:
>Vastly more complex and heavier folding adjustable sight
>Barrel cooling fins which add mass to the barrel
>A big ass cutts compensator
>Foregrip handguard
>Drum magazine
The feature rich M1928A1 is only 8oz heavier than the simplified (in both reciever and bolt) M1A1 which has none of those features, and arguably has a pure fricking dogshit sight that makes the Greasegun blush.
Quality post thanks I learned things today.
>The blish [...] provides some level of moronation
Hehehehehehe
Lol the b***h is back for more
And here you are, ready to supply my (You)s
Hes SEETHING and been monitoring this thread for what like almost 20 hours now? What a loser
>projecting on me
sometimes i wonder if bigc is just a massive shitpost or a weird fusion of whoever you really are subconsciously coming out due to internet anonymity
>how many shitposts does it take to satiate the namegays..the world will never know
>he's still going
lol keep it up
Congratulations on ruining a good thread. I hope both of you homosexuals die horribly.
i didn't do anything, my first post was perfectly on topic
this other dude just can't control himself
>PrepHole is one person
I'm almost certain none of these are the same person.
Lurk moar newbie
>im almost certain that
i don't care lol
reply again, also, i've been here WAY longer than you, feel free to go back at any time
the fact you're calling me a newbie just shows how new you are
This would have been a perfectly normal thread if you weren't an attention seeking tripgay
OP here
I am a homosexual, but even I know enough to tell all you derailing morons to go to hell
especially the tripBlack person
There you go, ruining the thread again
You could just not do this, you know that right?
>im going to show everyone how im not the one fricking this thread up by responding to every post
there he is, doing it again!