Understanding Dynamo-Technology Switches in Early Weaponry

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Discussion Overview

The discussion revolves around the concept of "dynamo-technology switches" used in early weaponry, particularly in the context of a nuclear bomb incident in North Carolina in 1961. Participants are exploring the function and reliability of these switches, their failure modes, and the implications for detonation mechanisms.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants inquire about the definition and function of a dynamo-technology switch, expressing confusion over its mechanics and purpose.
  • Others reference a historical incident where a nuclear bomb was dropped, noting that the failure of a switch may have prevented detonation, though there is uncertainty about whether the failure would have caused detonation instead.
  • One participant mentions that three out of four switches fired, suggesting that all switches needed to trigger in sequence for detonation, raising questions about the operational status of the switches.
  • There is speculation about the nature of the dynamo technology switch, with one participant suggesting it may refer to a motor-driven rotary switch, while expressing a lack of knowledge about the specific types used in the bomb.
  • Links to external resources are shared to provide additional context about early locking systems and switch types, though their relevance to the discussion remains uncertain.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and agreement regarding the function and reliability of dynamo-technology switches, with no consensus on their exact nature or implications for the incident discussed.

Contextual Notes

There are limitations in the discussion regarding the clarity of the switch's operational mechanics and the conditions under which the switches were expected to function. The exact definitions and implications of "dynamo technology" remain unresolved.

mishima
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"dynamo-technology switch"?

From this article:
NBC news article

What is a dynamo-technology switch? Why were they not using another type of switch? Thank you.
 
Engineering news on Phys.org
For those not willing to click the link, a nuclear bomb was dropped in North Carolina in 1961, and this switch failing prevented it from exploding.
 
mishima said:
From this article:
NBC news article

What is a dynamo-technology switch? Why were they not using another type of switch? Thank you.

They tried to use a CRM-114 switch but it wouldn't fit. :smile:
 
mishima said:
For those not willing to click the link, a nuclear bomb was dropped in North Carolina in 1961, and this switch failing prevented it from exploding.

Where do you get this? I read the article and it isn't completely clear to me whether the failure of the switch prevented a detonation or if a failure would have caused detonation. My first assumption was that had the switch failed it would have detonated.
 
The actual document the guardian links to on that same page says 3 of 4 switches fired. The idea there was all 4 switches had to trigger in sequence to detonate the warhead. One did not. The other three were "set off by the fall."

I just don't know what a dynamo technology switch is to really know how to interpret things. Like, were the other 3 supposed to be triggered by the fall? If not, then yes it was those 3 switches that failed and not the one.

Anyone ever hear of a dynamo technology switch? Is it like a solenoid or something?
 
mishima said:
The actual document the guardian links to on that same page says 3 of 4 switches fired. The idea there was all 4 switches had to trigger in sequence to detonate the warhead. One did not. The other three were "set off by the fall."
So one switch was operating properly, and the other three were not (unless someone armed them for whatever reason).

I don't know what "dynamo technology" means.
 
mfb said:
So one switch was operating properly, and the other three were not (unless someone armed them for whatever reason).

I don't know what "dynamo technology" means.

It's a fancy name for a "motor driven rotary switch". I've no idea what type(s) were actually inside that bomb but these are some common types.
http://www.surplussales.com/switches/SWLedex-1.html

This information is about early locking systems that 'might' have been on some weapons of that era in addition to normal arming. (ESD devices, mechanical locks or a PAL type devices) All modern weapons do have these systems.

https://www.cs.columbia.edu/~smb/nsam-160/Theater_Control/chap1.pdf
hardware https://www.cs.columbia.edu/~smb/nsam-160/Theater_Control/chap2.pdf
https://www.cs.columbia.edu/~smb/nsam-160/Theater_Control/chap3.pdf
 
Last edited:

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