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Seam lines on US bombs (PIMA museum)
Knuckles
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Oregon, United States
Joined: March 09, 2017
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Posted: Monday, May 22, 2017 - 07:44 AM UTC
I was at Pima air museum recently, and snapped a pic of a Snakeye that I found interesting. For the last 2 or 3 decades I have been perfecting seam removal on the hundreds of dumb bombs I've built. Lookie here--they actually HAVE a seamline.

Bravo1102
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New Jersey, United States
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Posted: Monday, May 22, 2017 - 07:53 AM UTC
The same is true with T-34 fuel tanks.
Pave-Hawk
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Western Australia, Australia
Joined: May 05, 2006
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Posted: Monday, May 22, 2017 - 08:01 AM UTC

Quoted Text

I was at Pima air museum recently, and snapped a pic of a Snakeye that I found interesting. For the last 2 or 3 decades I have been perfecting seam removal on the hundreds of dumb bombs I've built. Lookie here--they actually HAVE a seamline.



Is that an actual disarmed bomb, or just a cast concrete practice bomb painted up to look like the real thing?
Knuckles
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Oregon, United States
Joined: March 09, 2017
KitMaker: 525 posts
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Posted: Monday, May 22, 2017 - 08:47 AM UTC

Quoted Text


Quoted Text

I was at Pima air museum recently, and snapped a pic of a Snakeye that I found interesting. For the last 2 or 3 decades I have been perfecting seam removal on the hundreds of dumb bombs I've built. Lookie here--they actually HAVE a seamline.



Is that an actual disarmed bomb, or just a cast concrete practice bomb painted up to look like the real thing?



It was steel.Not sure beyond that.
Kevlar06
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Washington, United States
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Posted: Monday, May 22, 2017 - 08:54 AM UTC

Quoted Text



Is that an actual disarmed bomb, or just a cast concrete practice bomb painted up to look like the real thing?[/quote]

Bombs are interesting things-- most are cast and filled-- a few are machined, but for the most part they are not uniformly smooth on the outside, and many do have imperfections, especially the larger "dumb" ones. On the other hand, Artillery rounds are generally machined, because the ogive must fit the barrel precisely, and the rotating band has zero tolerance for rough spots when it goes down the tube. I've seen real bombs with very rough surfaces, it just depends on the type.
VR, Russ
Pave-Hawk
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Western Australia, Australia
Joined: May 05, 2006
KitMaker: 900 posts
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Posted: Monday, May 22, 2017 - 09:29 AM UTC

Quoted Text



Bombs are interesting things-- most are cast and filled-- a few are machined, but for the most part they are not uniformly smooth on the outside, and many do have imperfections, especially the larger "dumb" ones. On the other hand, Artillery rounds are generally machined, because the ogive must fit the barrel precisely, and the rotating band has zero tolerance for rough spots when it goes down the tube. I've seen real bombs with very rough surfaces, it just depends on the type.
VR, Russ



That's a good point actually, machining something that big would be a heck of a job.
Knuckles
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Oregon, United States
Joined: March 09, 2017
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Posted: Monday, May 22, 2017 - 09:49 AM UTC
I understand they used retired 155mm M110 barrels for some of the early bunker buster type bombs.
Scarred
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Washington, United States
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Posted: Monday, May 22, 2017 - 01:08 PM UTC

Quoted Text

I understand they used retired 155mm M110 barrels for some of the early bunker buster type bombs.



GBU 28, made from the 8" M110 barrel. One of my electronic instructors in college worked on the project. He told us it took them less than 2 weeks to design and build it and less than a month to get them in theater during D.S.
Knuckles
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Oregon, United States
Joined: March 09, 2017
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Posted: Monday, May 22, 2017 - 09:44 PM UTC
Badass!
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