[Milsurplus] Milsurplus Digest, Vol 163, Issue 28

[Raymond F Chase]

The rotational force that the fuze had to withstand was 5000 G’s, don’t know how that relates to rotational RPM or RPS.

Ray

 

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Bob Camp
Sent: Monday, November 13, 2017 12:04 PM
To: Kmec at aol.com
Cc: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Milsurplus Digest, Vol 163, Issue 28

 

Hi

 

Depending on the bore of the artillery, the 500 per second could well be correct. 

 

The Mark 12 5” Navy gun had a rifling rate of 1 in 157” (13 feet). Muzzle velocity

was around 2,500 FPS. That gets you to 192 revs per second or 11,500 RPM. A

smaller bore weapon might easily hit the 500 revs number since rifling scales with

bore size. 

 

Bob

 

 





On Nov 13, 2017, at 10:50 AM, Jeff Kruth via Milsurplus <milsurplus at mailman.qth.net <mailto:milsurplus at mailman.qth.net> > wrote:

 

Hi!

 

I think there is an error in the article cited:

 

 To convert it to a workable device required the development of radio components rugged enough to withstand an acceleration force 20,000 times stronger than normal earth’s gravity and a centrifugal force set up by approximately 500 rotations per second.

 

Pretty fast rotation, probably should be 500 RPM. Otherwise the rotating band would strip right through the barrel lands of the cannon.

 

 

Regards,

Jeff Kruth

 

In a message dated 11/13/2017 3:03:15 A.M. Eastern Standard Time, milsurplus-request at mailman.qth.net <mailto:milsurplus-request at mailman.qth.net>  writes:

http://www.smecc.org/radio_proximity_fuzes.htm

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