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Klub Zbrane [ŽP: 24 týdnů] (kategorie Věda a Technika) moderují Al, El_Diablo, ocs, themajkl.

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Domovská stránka aktualizována 2.12.2019 04:02
Omlouvám se ale bohužel jsem musel zakázat psaní anonymům, protože nám tu nějaký sabotér vložil "hack" kvůli kterému nešlo přispívat nikomu. Nevím jestli to pomůže, ale snad nad tímto darebákem budeme mít větší kontrolu.
Srdečně zveme do tohoto klubu všechny, kteří se zajímají o zbraně, střelbu a všechno, co s tím souvisí a chtějí si o tom všem v přátelské atmosféře povídat, poradit druhým, nebo se naopak chtěji zeptat na radu.

~~Kdo chce vystupovat anonymně (tj. bez registrace na Lopuchu), musí si vymyslet nějaké jméno nebo přezdívku a psát ho do každého svého anonymního příspěvku.~~

Každého přece musíme v diskusi nějak oslovovat, aby bylo jasné, kdo na koho reaguje. Kdybychom měli odpovídat několika bezejmenným anonymům najednou, byla by diskuse značně nepřehledná. Takže, kdo neuvede jméno či přezdívku, ten jako by nebyl.
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	El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 20.11.2024 20:07	34513
	P99: The Pistol that Rejuvenated Walther For a couple decades after World War Two, Walther survived on legacy designs - the PP/PPK and P38 (eventually made with an aluminum frame as the P4) primarily. In the 1970s they developed the P5 for German police use, and this was a reasonably successful pistol, but expensive and complex. Something more modern was needed to keep the company relevant in the market. The first attempt was an all-steel Browning style pistol, the P88. This was put into production, but was never very popular. Next was an attempt to recreate the PP in 9x19 with a locked breech, the PP90. This was a complete failure, never getting past prototype stage. And by this time the company was essentially bankrupt, and was put up for sale. German airgun manufacturer Umarex came to the rescue, wanting to see a historic German company remain underGerman ownership. They purchased the firm, and a new R&D effort led to the release of the P99 in 1996. This was a truly cutting edge pistol at the time, with a polymer frame, interchangeable backstraps (the first production pistol of its type to have this feature), ambidextrous controls , and a remarkably good DA/SA striker firing system with a decocking button. With company manager Wulf-Heinz Pflaumer putting a preproduction example into the hands of James Bond (Pierce Brosnan) in "Tomorrow Never Dies", the gun got off to a hot start, and proved very successful, rescuing the company from financial disaster. Over about 25 years of production it was licensed to several additional manufacturers (including S&W and Radom), made in a variety of colors, trigger styles, and calibers, and not finally discontinued until 2023.


	El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 18.11.2024 16:40	34512
	Single-Rune bnz43 SS Contract K98k In 1942, the SS devised a plan to rent out concentration camp labor to companies in the German armaments industry. Several different rifle production lines were set up to make use of this source of cheap labor, and the one we are looking at today is Steyr’s plant at the Gusen camp (a subsidiary of Mauthausen). A rifle production line was established there in March 1943, and in June 1943 Stern signed a contract to supply the SS directly with 10,000 K98k rifles per month. This production was outside the standard Wehrmacht inspection protocol, and the rifles are recognizable as SS contract guns by having receiver codes of bnz43, bnz44, or bnz4 in addition to: Lack of WaA inspection stamps No letter suffix on serial numbers Serial numbers only on receiver, bolt, safety, trigger guard, stock, and hand guard (later also floor plate) The Gusen production line was not always able to produce as many parts as needed for the SS contract, especially receivers early on. To complete the necessary rifles, parts were brought in from other Steyr factories (in particular the plant in Radom, Poland). These supplemental outside parts were marked with single “S” runes to indicate their special destination, and to bypass regular Wehrmacht inspection. Thus the rune-marked receivers are actually the non-camp-produced ones, contrary to general assumption. At any rate, this special SS contract lasted until 1944, when it was cancelled and Gusen production rolled into the standard Wehrmacht logistics program. In September 1944 the Soviets occupied Radom, and the loss of the rifle factory there forced the Wehrmacht to find a replacement source of arms. Before that Gusen parts were also used to supplement other factories, but after October 1944 its role fundamentally changed.


	El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 15.11.2024 14:17	34511
	A DAO Service Revolver in the Civil War: the Pettengill Army The Pettengill revolver is a 6-shot, muzzleloading double-action-only system designed and patented by C.S. Pettengill in 1856, and improved by Edward Raymond and Charles Robitaille in 1858. In 1859, the Rogers & Spencer company was contracted to put them into production as a .31 caliber pocket model and a .34 caliber Navy model. Shortly after the outbreak of the Civil War, Amos Rogers took a couple of the .34 Navy models to Washington DC to look for a military contract. The Secretary of War was impressed by the double action system, and ordered a contract for 5,000 of the revolvers. The contract was signed on January 10, 1962, and it requires the first thousand guns to be delivered in 90 days, with 1,000 more per month after that. When the deadline for the first thousand guns came around, Rogers & Spencer only had a single sample ready. What they thought would be a simple process of scaling the gun up from .34 to .44 caliber actually required some re-engineering, and that had taken time. So they sent the sample, which was duly evaluated by Springfield Armory. They deemed it well made, reasonably reliable, and unfit for military service because of the double action only trigger. As a result, the contract with Rogers & Spencer was cancelled. This must have come as quite the shock to the company, as the DAO trigger was the main selling point of the gun - and because they had invested a whole lot of money in tooling and material to fulfill the contract. Fortunately, they were able to make the case to the government that cancelling the contract was unfair and would completely bankrupt them, and a new contract for 2,000 revolvers was issued in June 1862, essentially just to bail out the company. Ultimately all 2,000 guns were delivered in late 1862, and they were put into service in 1863 to good effect. In fact, a second contract for 10,000 more of the revolvers was issued in April 1863, but never fulfilled because Rogers & Spencer developed a new revolver to replace the Pettengill. After the Civil War the surviving Pettengills were put into storage for a few decades. An initial batch of 196 were sold in 1976 for $1.75 each, and the remaining stock of 525 more were sold as a batch for $143.75 in 1882 (that’s 27.4 cents each).


	El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 15.11.2024 00:48	34510
	Необычная старинная "мелкашка" Неопознанная винтовка 19-го века. Может вы знаете, что это?


	El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 14.11.2024 22:38	34509
	VAG-73 /72 SOVIET “MONSTER” HANDGUN: RULE-BREAKER


	El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 13.11.2024 20:46	34508
	Colt Boa: Rarest of the Snake Revolvers Of the seven revolvers Colt named after snakes, the rarest is the Colt Boa. Only a single production run of these were made totaling just 1,200 guns. They were made in 1985 as a custom order for the Lew Horton distribution company, which wanted something unique to offer its buyers. The Boa was an intermediary between the standard Colt MkV and the high-end Python. It was a 6-shot .357 Magnum with a full underlay and ventilated shroud. The only variation was in barrel length, as half were made with 4” barrels and half with 6” barrels. The serial numbers were “BOAxxxx”, with the 4” guns having odd numbers and the 6” ones getting even numbers. Five hundred of each were sold individually, but the first 100 of each length were packaged together into sequentially-numbered pairs in fancy cases. The Boas all sold in 1985, and they are now the hardest to find for the Colt Snake collector. This particular pair is a gorgeous example of an original cased set, numbers 43 and 44.


	El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 11.11.2024 17:27	34507
	Unikáty pro císaře i samopal ze vzduchovky. Muzeum láká na příběhy zbraní 11. listopadu 2024 11:59 Pušky a pistole vojenské, lovecké či civilní, ale též sportovní palné zbraně, to vše z období od 17. století do současnosti. Novou a doslova nabitou výstavu otevřelo nyní Vlastivědné muzeum v Olomouci. Láká na mistrovská díla puškařů i podomácku vyrobené zbraně. Zdroj: https://www.idnes.cz/olomouc/zpravy/muzeum-vystava-pribehy-palnych-zbrani-unikaty-cyklus.A241111_826114_olomouc-zpravy_stk


	El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 11.11.2024 17:18	34506
	Spoils of War: French Occupation-Production Mauser K98k svwMB Allied troops occupied the Mauser factory complex in Oberndorf in April of 1945, right at the end of the war. The factory was put under French administration and by May that same year production lines were restarted to supply French forces (who needed as many arms as they could get). In total, just under 52,000 new K98k rifles were made for the French between May 1945 and June 1946, when the factory shut back down (and much of it was dynamited by the departing French forces). The rifles made under French control were all marked with the receiver code svwMB. German production had switched to this code early in 1945 after producing an “a” block of svw45 rifles and about 5,500 guns in the svw45 “b” block. The factory shutdown came midway through svwMB “c” block, and the first French-property rifles had been assembled under German control and were waiting for final inspection when the factory was occupied. Mauser production was non-linear, and some “c” block receivers had been finished and shipped to German forces before the shutdown, while others remained at the factory. There is no specific transition point between French and German rifles because of this. Production of the “c” block ran into the 29,000 range, and was followed by three suffixes of entirely French-production guns; “d”, “h”, and “k”. The K98k being produced by this point - and what was continued under the French - was the Kriegsmodell, the last-ditch simplified model of the K98k. It had many stamped and welded parts, no barrel band springs (screws were used instead) and no bayonet lug. The French produced the guns in exactly the same configuration as the Germans had, simply substituting a five-pointed star as a final inspection stamp in front of the receiver serial number. At some point later, the French rebuilt many of these rifles and added two distinctive features that are often thought to have been original factory production elements. These are the hexagonal stacking rod under the muzzle and the left-side sling bar on the stock. When these rebuilds were done, the bolts were also scrubbed and renumbered with just the last 3 digits of the receiver serial number.


	J_J 9.11.2024 16:49	34505
	Při vlastní střelbě z větrovky by asi s vodíkem zásadní problém nebyl. Z principu se tam vždy jen rozpíná, tedy ochlazuje, většina dílů je z neželezných materiálů, takže jiskření moc nehrozí, se vzduchem se to míchá až po výstřelu.... Ale přece jen je to trochu náročnější na slušné zacházení při skladování, péči o lahve a tak. Takže mně stačí vzduch a občas pro legraci to helium.


	Sven ukaž člověku smrt a smíří se s horečkou 9.11.2024 11:12 - Odhlášení (01:07)	34504
	☺podle fyziky zřejmě ano. ☺ Navíc není inertní jako helium a s kyslíkem reaguje docela bouřlivě...☺


	ocs sine ira et studio - OCSite 9.11.2024 03:29	34503
	čím nižší molekulová hmotnost media, tím vyšší výkon Takže optimální by byl vodík?


	Sven ukaž člověku smrt a smíří se s horečkou 8.11.2024 19:05 - Odhlášení (01:07)	34502
	J_JJo, k těm větrovkám - čím nižší molekulová hmotnost media, tím vyšší výkon... ----------------- Co se týká všelijakých binárních směsí a nebo i jenom vzduch+palivo, tak i blbej benzin má v sobě asi cca 3x víc skryté energie, než bezdýmný střelný prach... --------------------- JInak teď jsem si dal týden pauzu - jsem na chatě a stříhám keře - tak řezy asi až potom, protože tady musím nutně vypít pár stakanů vodky každý večer..., ☺ ☺ ☺ --------------------- P.S. A promiň mi mou zvědavost - Ty jsi, nebo nejsi nějak angažovaný u nějaké zbrojařské firmy? - \|Ale možná jsem zvědavý až moc, tak kdyby to bylo moc zvídavé, tak promiň a neodpovídej ☺ ☺ ☺ --------------- Sven


	El_Diablo Veškerá nepodstatná elektronická zařízen - mimo provoz, včetně kontroly pravopisu. 8.11.2024 16:01	34501
	G33/40: Special Carbine for the Gebirgsjager When the Germans took over control of the Czechoslovakian arms industry, they took some time to work out what out to be mass produced at the Brno factory. In the interim, they decided to restart production of the Czech vz33 Mauser carbine as the Gewehr 33/40 for German mountain troops. This was a truly short carbine with a 19.4 inch (490mm) barrel, which the Czechs had used for mostly police applications. German had used a short carbine back before World War One, but with Spitzer ammunition it was deemed too harsh shooting (both blast and recoil) to be worth the reduced length. Well, that calculation was different for mountain troops. The G33/40 also had a distinctive added metal plate on the left side of the stock to help protect it in mountain use. The G33/40 would remain in production for three years, from 1940 until 1942 (after which the rifle production changed to standard K98ks). About 130,000 were made, with 945 receiver codes in 1940 and dot codes thereafter.


	J_J 8.11.2024 13:54	34500
	Větrovky jsou na čistý vzduch. Nebo na helium, nemáš-li hluboko do tresoru a chceš přidat výkon ;-) Na vstřikované tekuté palivo se dělaly/dělají tzv. bramborové kanony (spud gun). Většina lidí tam od oka stříkne spray na vlasy nebo plyn do zapalovačů a taky to funguje. Nicméně dá se to udělat i pořádně a ani to není tak složité. Dají se použít například automobilové vstřikovače a jiné off-the-shelf komponenty. Pár takových hraček jsem před lety postavil, ale pak jsem šel cestou stlačeného vzduchu. S těsněním jsem žádný problém nenaznamenal. Co si pamatuju, tak největší opruz byla kondensace vstříiknutého paliva při nízké okolní teplotě.


	J_J 8.11.2024 13:46	34499
	S páčkou je to jednoduché. Buď strávím dvě hodiny u soustruhu, plus musím řešit vhodný materiál, přípravky apod. nebo hodím 3D model a pár peněz po Číňanovi, ať se stará on. Mimochodem, je-li k disposici model, tak některé drobné ale komplikované díly vyjdou při zakázkovém tisku z oceli výrazně levněji, než nákup originálu z tovární velkovýroby. Namátkou vytahovač na MP5 nebo páčka záchytu zásobníku k FG-42.

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