Random Museum Ordnance Photos

[Bellifortis]

Hallo,
can anyone explain the function of the first pictured fuze with the ring of holes (page 26 from 19th of November). It looks similar to a german WW2 bombfuze, but the holes ? What is their function?
Thank you in advance for your consideration,
Bellifortis.

 

[US-Subs]

I was also hoping that someone would have info on that one, it looks like the fuze for the SD-10 (AZ-10 (hut)?).

 

[Snufkin]

can anyone explain the function of the first pictured fuze with the ring of holes (page 26 from 19th of November). It looks similar to a german WW2 bombfuze, but the holes ? What is their function?
QUOTE]

The fuze appears to be for a high speed projectile that doesn't spin, i.e. maybe a (surface launched) rocket. The gear train appears to be just an arming device.

The top and side holes allow an airflow which rotates the perforated brass disc attached to an axial spindle. The spindle terminates in a cog directly below the flat base of the conical part, mating with the large thin cog (top right below the cone). The final cog on the left has a spindle that locks the detent; the gear train ultimately allows the detent pin to fly out under the action of its spring when this spindle rotates a certain amount. The fuze is then armed and on impact either the inertia of the brass striker is sufficient to overcome the creep spring, or the top length of the first axial spindle is pushed down through the central cogs to drive the striker home.

The gear train is initially locked by the safety pin at left.

A lightened scan of the original shows the gears a little clearer than the original.




Tom.

 

[EOD]

I want to say that the French projo is a 155mm, but would have to check the files in the Bombatorium to be sure (long day today and I'm in for the night).

The drum is a Japanese toxic red candle, large size. Red indicates a DA/DC filling. This one was self ejecting, prop it up on it's two legs and fire it downrange.

Thanks a lot for the explanation!

 

[EOD]

can anyone explain the function of the first pictured fuze with the ring of holes (page 26 from 19th of November). It looks similar to a german WW2 bombfuze, but the holes ? What is their function?
QUOTE]

The fuze appears to be for a high speed projectile that doesn't spin, i.e. maybe a (surface launched) rocket. The gear train appears to be just an arming device.

The top and side holes allow an airflow which rotates the perforated brass disc attached to an axial spindle. The spindle terminates in a cog directly below the flat base of the conical part, mating with the large thin cog (top right below the cone). The final cog on the left has a spindle that locks the detent; the gear train ultimately allows the detent pin to fly out under the action of its spring when this spindle rotates a certain amount. The fuze is then armed and on impact either the inertia of the brass striker is sufficient to overcome the creep spring, or the top length of the first axial spindle is pushed down through the central cogs to drive the striker home.

The gear train is initially locked by the safety pin at left.

A lightened scan of the original shows the gears a little clearer than the original.




Tom.

As it still has the nose suspension like the AZ 10 C hut it is a bomb fuze.

 

[Snufkin]

As it still has the nose suspension like the AZ 10 C hut it is a bomb fuze.

So the 10+kg of the bomb would be suspended on the ~4mm diameter top spindle? Fair enough.

 

[EOD]

Yes, that is what they did. The bombs were suspended nose up.

 

[US-Subs]

Sorry to say, but it looks like I am running out of grenade photos. Just a few left - sorry Darryl...... Lots of projos, fuzes, mortars etc. to go though -

 

[spotter]

Most likely the "Fuze, Smoke Pot, M208" fitted on the Smoke Pot, Floating, SGF2, AN-M7A1.

the following may be of interest to some

Before the M7A1 smoke pot can be employed, the ring clamp and outer cover must be removed. The M208 fuze safety lever is held against the fuze body and the safety pin withdrawn by pulling the pull ring. The pot is lifted by its handle and dropped into the water. The air chamber in the pot causes it to float. When the safety Iever on the M208 fuze is released, the striker, driven by the striker spring, hits the primer which ignites. Flame from the primer travels through the first-fire charge and the delay charge and ignites the ignition charge. Flame from the fuze ignition charge passes down the venturi tube of the smoke pot and ignites the starter mixture, which ignites the fuel block. Hot gases from the burning fuel block pass upward through the venturi tube into the air chamber, melting solder seals in the pressure tube and venturi tube and building up pressure. The pressure is released through the pressure tube to force the oil in the oil chamber up the oil-feed tube into the venturi tube. The hot gases vaporize the oil, carry it into the air chamber, blow the tape from the three ventholes in the inner cover, and melt the solder from the sinkholes. As the vaporized oil escapes through the ventholes, it condenses to forma dense white smoke cloud. While the fuel block is burning, pressure inside the pot prevents water from entering through the sinkholes. When the fuel is consumed, pressure inside the pot falls, water enters through the sinkholes, and the pot sinks.

 

[sgtlynn]

Sorry to say, but it looks like I am running out of grenade photos. Just a few left - sorry Darryl...... Lots of projos, fuzes, mortars etc. to go though -


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No problem I have found a lot of information in this thread and find it one of the most interesting ones posted. Amazing amount of photos of some of the rarest items around. Even without much more in the way of grenades I will still check it everyday to check out the other obscure items. Much appreciated by all I am sure.:tinysmile_twink_t2:

 

[EOD]

What is the caliber of #3&4?
It is a Danish WP mortar projectile - highly unusual.

 

[Alpini]

What is the caliber of #3&4?
It is a Danish WP mortar projectile - highly unusual.

the second photo says: 120 mm

 

[spotter]

Danish 120mm M56..

source unknown these are images i have from my Danish files

 

[Bellifortis]

(Quote Snufkin 323)
Thanks for your nice explanation. I'm surprised over this mechanical set up, which is the same like the mechanical set up for now modern "Turbo Generator"Fuzes, that I was puzzling about in another discussion here. Meanwhile I found out, that the US used the "Turbo Generator" to supply electricity to a fuze, since 1944. Why german technicians did not think of using the above known mechanical set up to produce electricity, seems strange to me.
Have a good start in 2014, regards,
Bellifortis.

 

[EOD]

the second photo says: 120 mm

Yes, I found that later when I started sorting the images into the respective files and renaming them.

 

[EOD]

Danish 120mm M56..

source unknown these are images i have from my Danish files

Allan, thanks a lot, good to have these details!

 

[butterfly]

(Quote Snufkin 323)
Thanks for your nice explanation. I'm surprised over this mechanical set up, which is the same like the mechanical set up for now modern "Turbo Generator"Fuzes, that I was puzzling about in another discussion here. Meanwhile I found out, that the US used the "Turbo Generator" to supply electricity to a fuze, since 1944. Why german technicians did not think of using the above known mechanical set up to produce electricity, seems strange to me.
Have a good start in 2014, regards,
Bellifortis.

The fuze in question looks as though it was for the SC10 bomb. The later SD10-C used the AZ (66) fuze, (which was a fuze that generated its own elecricity). I wonder if the fuze in the photo is part of the development process. (I note also on the cutaway section that there are markings and in particular an A and 33 - not sure if this is significant in view of the fact the original fuze was a AZC (3) hut - I cant find any information about a fuze (33) ??? any significance in this???)

I know there was a dust fuze that was used with the SC10 and also Fjordhouse (Ben) had a fuze which remains unidentified which looks also like it was used on the SC10 bomb. I will add a link below when I find it....
(note the dust fuze is also posted in the thread below - post 28)

http://www.bocn.co.uk/vbforum/threads/21406-unknown-German-(bomb)Fuze

regards Kev

 

[US-Subs]

The piece identified as Italian looks an awful lot like a minenwerfer - mis-ID or did the Italians copy it?

 

[US-Subs]

 

[US-Subs]