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Japanese Navy 250 KG Incendiary Bomb Type 2 No.25 Mark 3 Model 1

Investment

Well-Known Member
Hi,
These are the remains of a Japanese Navy 250kg incendiary bomb, Type 2, No.25, Mark 3, Model 1, which was recovered by EOD personnel. The nose fuze has been identified as a Japanese A-3(a) navy mechanical impact nose fuze. This type of bomb is usually dropped from 20,000 feet and explodes between 150 - 200 feet above the ground. However, this bomb exploded on impact with the ground after the Navy D-2(a) clockwork delay aerial burst, tail fuze, failed to operate correctly. The bomb travelled a metre into the earth with the majority of the incendiaries burning in the ground. The surrounding area was littered with burnt and unburnt incendiaries. All the rusty looking pieces were recovered from the hole. No tail fin was found. All unburnt incendiaries were destroyed by EOD. I have found a website explaining the occurrence of one of these bombs failing to explode in New Guinea in 1943. I have added the web link for those who may be interested in having a look. Also attached are pictures of the Japanese bomb and the different types of Japanese A-3 nose and D-2 tail fuzes from the OPNAV 30 3M Handbook of Japanese Explosive Ordnance.
Cheers,
Invest :tinysmile_fatgrin_t

http://www.lonesentry.com/articles/ttt/japanese-250kg-bomb.html
 

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More pictures . . . not coming at the moment, as getting frustrated trying to upload them.
 
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Great pics and write up there mate!

You may have to crop the other pics you have in case you are overloading whilst trying to upload??....

Any probs,PM bolo,Spotter or RichardB(he is a whizz on the comps)


best

waff
 
Hi Waff,
Thanks for the tip.
I will continue and try to post the remaining pictures.
Cheers,
Invest :tinysmile_cry_t3:
 
More pictures . . .
 

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More pictures . . .
 

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Last pictures with 250kg bomb in the middle of the second picture.
 

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I worked out that I wasn't allowing enough time for the attachments to upload correctly before posting them.
So, basically I was hitting the submit button too fast, which only attached my text and not the pictures.:alberteinstein:
 
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Some drawings of the bomb.
 

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Thats a cracking post invest,info on jap stuff over here is scarce,nice that this one never went off correctly when dropped.Were fuse failures common, as jap ordnance seems to be of crude manufacture? I know there small arms ammo and grenades were not always 100% reliable.:smile:
 
Hello Tigbrand,
As you would know fuze failure in WW2 bombs was a common occurrence amongst all countries involved in air-dropped ordnance. This is the only Japanese bomb that I have come across that didn't operate in the way that it should have. I agree the bombs do seem crude looking in manufacture, but the ideas behind designing them this way must have compensated for the way they worked. I'll post some photo's later of a few recovered Japanese bombs in the local museum. Japanese material is scarce over here, as well. :tinysmile_cry_t3:
Cheers,
Invest :tinysmile_shy_t:
 
The Japanese A-3(a) nose fuze after cleaning and ready for display in local museum.
 

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