40mm Bofors Round Joined to 2.75" Rocket Warhead

[andrew.m_23]

Can anyone help solve this mystery? These were found on multiple occasions in Arizona. The military manufactured an inert version of this (WTU-14/B), the rounds pictured below are believed to be live (Mk 1 Mod 0 warhead). Is there any information on this or on what the purpose is of joining a Bofors round to a 2.75" rocket warhead?

 

[US-Subs]

There was a 60-series document on them at one time, years ago. Strictly TP as I recall, a Navy thing. I've never seen any live, and that would be contrary to the documentation I saw so long ago. As to why they exist, I have no idea, like so many Navy projects. I'm sure that it made sense to someone at the time. I just recently saw a variation of the warhead, first one I've ever seen. A repaint, so the markings mean nothing. Also interesting is that the type of 40mm did not seem to make a difference, I've seen them as both AP and HE (TP) models. Mine shown as a comparison.

 

[Chris]

In the TM 60-2-2-1-2 there is photo Jeff

Chris

 

[US-Subs]

Thanks Chris -

 

[kilgoretrout]

In the TM 60-2-2-1-2 there is photo Jeff

Chris

The problem with that pub photo is it's a solid piece of steel not a round threaded to fit in a warhead. While I have a total belief that the US Gov does stupid stuff at this time they were more fiscally responsible and I dont believe they would make a full practice version without a live version.



With the amount of Bofor 40mm after WWII and the pick up of Korea and Vietnam i wonder if they used Bofors for fuzes on 2.75s to not stop producing fuming for other items at industry.

The ones in those pictures are either MK1 MK2 or M81 Bofor rounds. Not solid steal.