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Propellor hub-firing machine guns.

Weapons Systems Tech. Discuss Propellor hub-firing machine guns. in the Technical forums; Can someone please post a diagram and explain as to how propellor hub-firing machine guns in WW2 aircrafts, used ...


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Old 11-04-2007, 09:47 AM   #1
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Question Propellor hub-firing machine guns.

Can someone please post a diagram and explain as to how propellor hub-firing machine guns in WW2 aircrafts, used to work?

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Old 11-04-2007, 05:14 PM   #2
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Drawing shows it all.
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File Type: jpg bf-109.JPG (28.3 KB, 268 views)
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Old 11-06-2007, 04:03 AM   #3
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Hi Micdrow
I want to know where are these pictures came from?
That looks so good!
It show the detail about the weapon system about WW2 fighter very good.
I can see the machinegun's ammo came from where!
I proud you as my teacher said to me!
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Old 11-06-2007, 05:35 AM   #4
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Originally Posted by Steven Que View Post
Hi Micdrow
I want to know where are these pictures came from?
That looks so good!
It show the detail about the weapon system about WW2 fighter very good.
I can see the machinegun's ammo came from where!
I proud you as my teacher said to me!
Hi Steve, For those that know me I have a little library of books and manuals. The drawning above came from a Bf-109 manual. The big thing when posting pictures is to size them properly for the forum but also make the legible to read. I have multiple programs for that Adobe Paint, Corel but by far the one I use the most it the paint program that comes with windows XP.
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Old 11-06-2007, 05:51 AM   #5
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Smile Envy~~~

Wow! you have a little library yourself!
I always found some data about aircraft from my college's library.
But I have no much time to visit it.
I will choose on of my favorite book and copy it's picture and article.
Maybe one day I will show you my collections!
How to post some picture with article like yours? These pictures only come from Internet(Http://)? I have some pictures in my fileholder,I don not know how to post!
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Old 11-06-2007, 05:57 AM   #6
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I will choose on of my favorite book and copy it's picture and article.
Maybe one day I will show you my collections!
How to post some picture with article like yours? These pictures only come from Internet(Http://)? I have some pictures in my fileholder,I don not know how to post!

You will need a scanner to do that. If you post a small article try and name the books title and auther. One think I seem to be bad about doing. If you are talking about the Adobe documents then you need adobe acrobat to create these type of documents. Hope that helps.

By the way its a very small library. Maybe 600 books on various subjects from tanks, ships and aircraft. Not including my aircraft manuals. Most of the books are Hardcover, soft covered and in pdf format.
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Old 11-06-2007, 06:28 AM   #7
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How many bullets would fire through a propeller at a time I wonder?
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Old 11-06-2007, 07:27 AM   #8
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I have scanner already,but...

I want to know how to post pictures with article like Soundbreaker's P-51D...
I am very confused. Is item "Insert image"?
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Old 11-06-2007, 04:13 PM   #9
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I want to know how to post pictures with article like Soundbreaker's P-51D...
I am very confused. Is item "Insert image"?
Sounds like you are trying to make a signiture. Read link below.

http://www.ww2aircraft.net/forum/err...mage-8575.html (Attached image)
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Old 11-06-2007, 05:18 PM   #10
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The Mauser MG 151/20 for the Me 109 F-4/R5



And the Mk 103 30mm arrangement for the Do 335 V14.



Both from Cutaway Aircraft of WWII, Argus Books, 1989.
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Old 11-06-2007, 08:41 PM   #11
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Oh yeah! I see. Thanks~

No cannon in this craft. Because it is Japanese's suicide bomb!
"BaKa" is meaning "stupied" in Japanese.

Last edited by Steven Que : 11-06-2007 at 08:59 PM. Reason: I try to post image.
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Old 11-06-2007, 10:29 PM   #12
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How many bullets would fire through a propeller at a time I wonder?
Totally depends on the weapon . . .

I think what xtberia was getting at was how a weapon could fire through a crankshaft. The simple answer was it didn't, it fired through the reduction gear, not the actual engine. The barrel/blast tube usually went above/below the engine between the valve banks, and exited through the reduction gear, which was connected to the actual driveshaft.
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Old 11-07-2007, 02:15 AM   #13
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Quote:
Originally Posted by Steven Que View Post
I want to know how to post pictures with article like Soundbreaker's P-51D...
I am very confused. Is item "Insert image"?
Steven,

if you wanna join a picture to your signature, micdrow already gave you an answer. If you ask for loading pictures to your post from your PC, just click on Manage Attachments in post replay or new thread and download pictures you want...
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File Type: jpg howtodownloadpicture.JPG (131.9 KB, 222 views)
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Old 11-28-2007, 05:39 AM   #14
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Sorry folks, I am a bit late in responding to your prompt replies. With very vivid details too, I might add. Many thanks to Micdrow, Graeme and Steven Que.

Thanks too, to Stitch, for an insight as to how a gun would have fired through the propellor hub. However, without a picture or a drawing to aid in understanding how a reduction gear could have facilitated the entire arrangement, it becomes slightly difficult to comprehend.

In any case, what I was actually trying to figure out as to how the machine guns could have been synchronized to fire through the propellor without hitting the blades, in the process. [For a more clearer understanding of my question, please could you refer to the Bf109 drawing as posted by Micdrow.]
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Old 11-28-2007, 03:01 PM   #15
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Hi Xtberia,

>In any case, what I was actually trying to figure out as to how the machine guns could have been synchronized to fire through the propellor without hitting the blades, in the process.

Interrupter gear - Wikipedia, the free encyclopedia

Note that typically for Wikipedia articles, it features some good stuff (the diagram of a WW1 era interrupter gear) mixed with some deliberate spin-doctoring.

("German and Soviet fighter types in particular were slow to abandon fuselage-mounted guns" - the truth is that everyone else "was slow to" adopt electrical synchronization that made synchronization rock. Naturally every air force wanted their guns as close to the centreline as possible to do away with convergence/divergence issues, it's just that it was a technological challenge to develop a reliable, fast-firing, high-firepower, synchronization-compatible gun that would fit neatly into the nose or wing roots of an aircraft.)

Regards,

Henning (HoHun)
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