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Cooper bombs

Printed From: Cross & Cockade
Category: General Discussion
Forum Name: General
Forum Discription: General Discussion
URL: http://www.crossandcockade.com/forum/forum_posts.asp?TID=93
Printed Date: 19 Sep 2020 at 08:30
Software Version: Web Wiz Forums 10.03 - http://www.webwizforums.com


Topic: Cooper bombs
Posted By: Errol Martyn
Subject: Cooper bombs
Date Posted: 21 Jul 2009 at 03:52

I have read of 20 lb and 25 lb Cooper Bombs. Can someone confirm that these were two bombs of different type or if they were one and the same, one being wrongly described regarding its weight?

Errol



Replies:
Posted By: Grain Kitten
Date Posted: 24 Jul 2009 at 23:38
It may be 20 lb is the explosive weight, and 25 lb is the total weight including the casing. I can't find  a reference to confirm this at the moment.
Steve


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Posted By: Colin
Date Posted: 25 Jul 2009 at 10:41
Quote 'By July 1917 the veteran all-purpose 20lb Hales bomb was supplanted by the more robust and efficient 25lb Cooper bomb, later to be classified as a 20lb bomb. [Bombs Gone by MacBean & Hogben, Patrick Stephens 1990, p33]
HE Cooper bomb Mk I— Weight of case 20lb, explosives 4lb =total weight 24lb
Explosive substance: Amatol 80/20 (if filled Amatol 40/60 weight of charge 4lb 9oz)
Size: 24.4in x 5.12in maximum diameter
Colin


Posted By: Errol Martyn
Date Posted: 25 Jul 2009 at 12:24
Thanks for this, Colin.
 
I've also found some useful information on The Aerodrome forum at
http://www.theaerodrome.com/forum/aircraft/34737-how-much-weighed-really-cooper-bomb.html - http://www.theaerodrome.com/forum/aircraft/34737-how-much-weighed-really-cooper-bomb.html
See post No.3, which also includes images of two pages of a Jan 1918 Air Ministry document setting out specifications.
 
Errol


Posted By: Grain Kitten
Date Posted: 26 Jul 2009 at 00:05
Like Eric Morecambe, I was playing all the right words, but not necessarily in the right order   Smile

Steve


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