Ontelopanos vanha keksintö?

se että tykillä ammuttaessa nopeus kasvaa liian suureksi??? Onteloammus yli 100 m/s panssarikranaatti 700-yli 1000m/s. Onteloammus ei toimi suurilla nopeuksilla.

Sakemanneillahan oli 37mm tykissä, 3.7 cm KwK 36, "luudanvarsimorkula", German 3.7cm Stielgranate 41, Rodded Bomb, joka oli juuri onteloammus! Tykin putkeen työnnettiin pätkä "luudanvartta" ja itse "morkula" oli noin 20 cm halkaisijaltaan ja noin 30 cm pitkä jötikkä. Mikähän lienee ollut osumatarkkuus, mutta niitä käytettiin ensihätään kun 37mm tykki ei tehonnutkaan uudempiin panssareihin.

http://www.lemairesoft.happyhost.org/photo/char1/102016962.jpg


37mm Pak 36 with a "Stielgranate 41" shell ready to be fired. The shape charge shell was introduced by the muzzle but it allowed the outdated gun to resume its antitank role on short range after 1942

http://www.inert-ord.net/rod02h/stielgr/index.html

http://www.inert-ord.net/rod02h/stielgr/Stielgranate_l.jpg




Jopa kivääreillä ammuttaviakin ontelokranaatteja tehtiin: Gew.Pz.Gr.46 and Gew.Pz.Gr.61,

http://www.inert-ord.net/ger03a/gerrg2/ggp40/index.html


http://www.inert-ord.net/ger03a/gerrg2/mod30/index.html#AZ5071


http://www.geocities.com/pizzatest/panzerfaust8.htm



Tuossa on hyvä sivusto saksalaisista panssarintuhoamiskalustosta!

http://www.geocities.com/pizzatest/panzerfaust.htm


http://www.inert-ord.net/rod02h/stielgr/index.html

During W.W.II the Germans were faced with an ever increasing armor threat, especially on the Russian Front against the T-34 tank. The German 3.7cm PAK (Panzerabwehrkanone) 36 anti-tank gun was in wide spread use but pretty much ineffectual against tanks in general by 1941.While newer and more effective anti-tank guns were in production, distribution was another matter. Nor could they afford to just abandon the many PAK 36's in the field. Besides, it was still an effective light field gun. It is far easier to upgrade ammunition than the field piece and so was born the last (?) "rod grenade"...the 3.7cm Stielgranate 41 (a.k.a. 3.7cm Aufsteck Geschoss - "Attached Projectile").

This is a finned bomb with a massive hollow charge warhead.
(A lot more impressive when you hold this puppy in person than the pictures convey.)
It weighed almost 8.6kg(19lb) and had a very slow muzzle velocity of 110mps (361fps) which gave it an effective a range of only 300m(328yd).
It could reach out to about 800meters and would be just as deadly (as hollow charge weapons do not depend on velocity to do their work), but lack of accuracy is what limited it to a close range weapon. However it packed a big punch. The 2.42kg (5.3lb) warhead could penetrate 180mm (7in) of armor plate. Quite formidable for its day and could defeat any tank of the time.


The projectile was loaded in the muzzle of the gun, like a rod grenade and was fired with a special propellant cartridge. There are gas-check grooves in the base of the rod to reduce gas blow-by.

(I wonder it the cannon suffered he same negative side effects as rifles used for launching rod grenades during World War I ? If so this would be a "last ditch" weapon of choice.

Interesting that it used both point detonating and base detonating fuzes. A rather unique fuze combination for a hollow charge munition

Tykkien ongelmana on se, että niiden ammukset ovat pyörintävakautuvia (tosin näin myös joissain singoissa) Pyörintävakaus hajauttaa onteloammuksen suihkua ja vähentää läpäisytehoa reilusti. Ratkaisuja on yritetty aikojen saatossa moniakin esm. muovisia sabotteja, teräskuulia vakauttajana ja parhaimpana siipivakautusta.