Hi
If you fancy removing the masts , it's currently out for tender:
http://bidstats.uk/tenders/2020/W24/728498476
Good luck !
Best Neil
Ammonium nitrate based explosives were a favourite of the I.R.A. during their campaign of terror ,mainly due to the ease of getting hold of the readily and easily obtained ingredients .
Similar incident
Lost a dear navy seal friend
https://en.wikipedia.org/wiki/Evange...Base_explosion
Here are a couple of satellite shots that show the docks area before and after the blast. You can see how the place has been flattened....note the ship to the top of the ‘after’ picture that looks like it’s been capsized.
(Pictures from Daily Overview)
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The ship does look like it's on its side in the after picture, and you can clearly see how the nearer two have been pushed away by the blast and pivoted on their moorings. The buildings in the lower left hand corner on the other side of the docks look to have attained great damage also.
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Whoever does not know how to hit the nail on the head should be asked not to hit it at all.
Friedrich Nietzsche
The list of previous AN incidents on wikipedia is staggering, thought we were supposed to learn from these things. The incidents in Germany are a bit shocking, thinking it was a good idea to use mining explosives to break up big amounts of AN that had clumped together
https://en.wikipedia.org/wiki/Ammonium_nitrate_disaster
An updated summary: https://www.nytimes.com/2020/08/05/v...n-footage.html
Are you sure about that figure? It seems way off what I've read.
R
Ignorance breeds Fear. Fear breeds Hatred. Hatred breeds Ignorance. Break the chain.
I thought the same. That seems way to high.
Edit: actually, scratch that. A quick prod on the calculator shows it comes in at just shy of 2.45 tonnes. So judging by the figure quoted above, it’s correct.
Really brings home how much was there when you convert the measures.
Last edited by jaytip; 6th August 2020 at 10:56.
PS. I live where the ' U ' in Southend is....doh !
Best Neil
A 25kg bag should be safe, it can`t get hot enough in the centre to lead to a runaway decomposition/explosion. Large quantities are a different matter, the ratio of surface area: volume limits heat losses and consequently the core gets v. hot when decomposition begins. Slow decomposition becomes v. rapid as temperature rises and eventually goes into a runaway situation.
Despite a background in which includes chemical hazard studies I was amazed at this incident, I hadn`t realised how dangerous ammonium nitrate in storage conditions could be. What's disturbing is the fact that similar incidents have happened in the past, this was entirely preventable.
A 25kg bag should be safe, it can`t get hot enough in the centre to lead to a runaway decomposition/explosion. Large quantities are a different matter, the ratio of surface area: volume limits heat losses and consequently the core gets v. hot when decomposition begins. Slow decomposition becomes v. rapid as temperature rises and eventually goes into a runaway situation.
Despite a background in which includes chemical hazard studies I was amazed at this incident, I hadn`t realised how dangerous ammonium nitrate in storage conditions could be. What's disturbing is the fact that similar incidents have happened in the past, this was entirely preventable.
Of course.
https://www.sciencealert.com/beirut-...r-of-all-bombs
https://www.axios.com/beirut-nuclear...91c5da4e9.html
https://www.sciencemediacentre.org/e...rut-explosion/
https://globalnews.ca/news/7251572/b...onium-nitrate/
'2,440,000 Kg' is the equivalent of 2,400 tons.
R
Ignorance breeds Fear. Fear breeds Hatred. Hatred breeds Ignorance. Break the chain.
This is correct. In your initial post you used a decimal separator (full stop) rather than the thousand separator (comma). So what you wrote was 2.45 tonnes, or 2,450 kg.
Hence my smiley, too, as in France the comma is the decimal separator, and the thousand separator is the space. Needless to say I got caught more than once
'Against stupidity, the gods themselves struggle in vain' - Schiller.
I wasn't pulling him up, I asked him if he was sure of the figure as what I'd read suggested it was way off.
E.g.Jeffrey Lewis, a nuclear and conventional weapons expert at the Middlebury Institute of International Studies in California, estimated the yield to be "between 200 and 500 tons, looking at blast damage, the shockwave, seismic signals and the size of the crater."With an explosive yield of a few hundred tons, the Beirut blast would have been dozens of times less powerful than the atomic bomb that devastated Hiroshima, which had an estimated yield of about 15 kilotons.
The explosive power would, however, be comparable to the lowest yield B61 nuclear gravity bomb, which is believed to have an explosive yield of around 300 tons.A better estimate of the size will be available from a closer look at the damage patterns; but it looks initially that only a small fraction of the 2750 tons actually detonated – hundreds of tons of TNT equivalent, not thousands.Perhaps Andyg will show his source, or your could show were you got 2,750 from.The power that comes from 2,750 tons of ammonium nitrate blowing up is hard to calculate because it depends on a variety of factors, such as whether it was stacked on top of one another, Kristensen said.
“But there are a couple of early estimates that say it is equivalent to 0.24 kilotons, so 240 tons of TNT,” he said.
R
Last edited by ralphy; 6th August 2020 at 15:20.
Ignorance breeds Fear. Fear breeds Hatred. Hatred breeds Ignorance. Break the chain.
Those links you show are the yield of the explosion, i.e the equivalent in terms of TNT. It's a term usually linked to nuclear weapons, i.e this nuke had a yield equivalent to X tons of TNT. It is not to do with the amount of AN that was there
The actual amount of AN was apparently around 2750 Tonnes = 2.75 million kg = 3031 US Tons
Yes, I'm not an expert and I'm aware there are experts on the forum.
But my primitive understanding is that this thing was like the smallest tactical nuke in terms of yield although the blast and effects would be very different of course.
You are correct and I assumed that was what Andy was referring to, i.e. the equivalent of TNT. This misunderstanding arose as he had referenced the Manchester bomb as ‘about 1500kg’ and AFICR the bomb was in the rucksack of the bomber, so I assumed that he was referring to the TNT equivalent.
Either way, I accept that I got it wrong and for that I apologise.
R
Ignorance breeds Fear. Fear breeds Hatred. Hatred breeds Ignorance. Break the chain.
Sadly, Manchester has suffered a terrorist bombing more than once; I believe AndyG was referring to the 1996 IRA bombing that was fertiliser based, ca. 1500kg of explosives in a large van
The 2017 Manchester Arena bombing was carried out by a rucksack contained device, and used a different explosive type that I won’t detail.
I remember both events vividly (but luckily I wasn’t near either of them).
Last edited by Kingstepper; 6th August 2020 at 18:08.
Whoever does not know how to hit the nail on the head should be asked not to hit it at all.
Friedrich Nietzsche
A video has turned up with what appears to be a missile hitting the building immediately preceding the explosion!
John
The ship is indeed on its side. Picture taken from THIS BBC article.
Whoever does not know how to hit the nail on the head should be asked not to hit it at all.
Friedrich Nietzsche