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Author Topic: Movies; P38 cannon damage test  (Read 1814 times)

Offline Karnak

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Movies; P38 cannon damage test
« Reply #15 on: January 25, 2006, 12:46:22 AM »
Quote
Originally posted by B@tfinkV
although, saying that, as mentioned, a thin aluminium skin may just let the round pass through and not cause such an impact.

Not likely.  The Hispano HE rounds were  designed to explode very shortly after hitting an aluminium skin.  The German mine shells were designed to explode on contect, ripping the large chunks of skin off for even greater effect.

'Course, you could get lucky and be hit by a dud.  I've seen a photo of a P-51B that got hit by a dud 30mm round just behind the cockpit.  Hole in one side and out the other.  If it'd exploded the P-51 would have been blown in half at the very least.  I doubt the pilot would have lived.
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Offline B@tfinkV

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Movies; P38 cannon damage test
« Reply #16 on: January 25, 2006, 12:54:37 AM »
on more occasions than i'd care to remember you're obvious knoledge on our subject has been proven so i will take your word for it for sure. my comments as ever are mostly instantanious speculation.



would you agree that our damage model is possible a little too light with regard to HE rounds?
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Offline Wolfala

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Movies; P38 cannon damage test
« Reply #17 on: January 25, 2006, 02:06:55 AM »
Quote
Originally posted by B@tfinkV




would you agree that our damage model is possible a little too light with regard to HE rounds?


Yes.
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Offline Treize69

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Movies; P38 cannon damage test
« Reply #18 on: January 25, 2006, 02:18:25 AM »
Every time I start to complain about the MGFF, I remember that image of the Hurri from the BoB where the shell exploded on impact and only knocked off the paint.

Does anyone have that picture of the Blenheim that was accidentally hit by a 30mm round during testing? THAT is terrifying.
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Offline B@tfinkV

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Movies; P38 cannon damage test
« Reply #19 on: January 25, 2006, 02:29:00 AM »
check these out, and then go to the main menu and check some of the other stuff.


not really 30mm damage but pretty terrififying none the less.


http://www.daveswarbirds.com/b-17/nose.htm
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Offline B@tfinkV

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Movies; P38 cannon damage test
« Reply #20 on: January 25, 2006, 02:31:22 AM »
more on topic, bottom pic shows some cannon damage.


http://www.daveswarbirds.com/b-17/wings.htm
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Offline B@tfinkV

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Movies; P38 cannon damage test
« Reply #21 on: January 25, 2006, 02:32:49 AM »
yet more cannon damage, 30mm and rockets hit this page


http://www.daveswarbirds.com/b-17/fuselage.htm
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Offline B@tfinkV

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Movies; P38 cannon damage test
« Reply #22 on: January 25, 2006, 02:38:58 AM »
possibly the most incrdible section of pics here


http://www.daveswarbirds.com/b-17/tail.htm
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Offline gofaster

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Movies; P38 cannon damage test
« Reply #23 on: January 25, 2006, 09:34:02 AM »
You guys should check the other videos that guy loaded.  Some neat stuff there.
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Offline Bodhi

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Movies; P38 cannon damage test
« Reply #24 on: January 25, 2006, 10:38:42 AM »
Quote
Originally posted by Karnak
I think you misread Krusty.  I think he was saying "It did that much damage to a steel drum.  Imagine what it would do to a fragile Aluminium structure!"


since when has Aluminum been considered fragile?  Another thing that irks me about that video damage being compared to a aircraft, is that it is a pressure vessel, sealed and holding flammable liquid.  Quite different from an open aircraft structure.  Ohh, and the fuel tanks in most aircraft were not steel pressure vessels either, but either nylol and butyrate rubber, or just aluminum, or just soft rubber.
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Offline Toad

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« Reply #25 on: January 25, 2006, 10:42:34 AM »
The most interesting thing about the pics in Bat's links is that these photos were taken after the aircraft returned to base and landed.
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Offline B@tfinkV

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« Reply #26 on: January 25, 2006, 10:46:16 AM »
agreed Toad, some of these pilots must have had piloting skills literally oozing out of every pore!
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Offline Toad

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« Reply #27 on: January 25, 2006, 10:48:01 AM »
That and the fact that the B-17 was one tough aircraft.
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Offline Karnak

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« Reply #28 on: January 25, 2006, 11:16:31 AM »
Quote
Originally posted by Bodhi
since when has Aluminum been considered fragile?

Aluminum is not as strong as steel.  Fact.  Smaller quantities of a weaker metal will be comparitively fragile.  Fact.

That is not to say that aluminum is fragile compared to, say, glass.


The second point is that wing structures are also functionally pressure vessels when dealing with HE explosive rounds as are the fuselages of fighters.  For the blast to have enough room to be mitigated you need something more in the range of a bomber's fuselage.

Oh, I know that the wing isn't a sealed structure, but the blast of an HE device is not slow enough to allow the air contained in the wing to leave through the joints, gaps or holes.  The pressure builds too fast and the air must move now and something needs to give.  What gives is the weakest part, which is usually the thin aluminum skin.
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Offline Klum25th

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Movies; P38 cannon damage test
« Reply #29 on: January 25, 2006, 03:38:29 PM »
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