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February 19, 2020, 14:42:23 pm


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Author Topic: Sorry, not _exactly_ machining, but related  (Read 243 times)
lloydsp
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« on: February 09, 2020, 03:37:22 am »

As some of you may know, I'm in the business of designing and making mechanical components and designing/testing new pyrotechnic formulae for fireworks companies in the USA.

This evening, a friend of mine, Mr. Jim Widmann of Connecticut launched the WORLD's RECORD largest fireworks shell ever built!  It functioned properly.

It was 62" in diameter, and weighed over 2790 lb.

Jim and I work out tool designs together occasionally.

Wow!

Lloyd
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Bubba
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« Reply #1 on: February 09, 2020, 12:12:02 pm »

It was 62" in diameter, and weighed over 2790 lb.
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Bob La Londe
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^ 8.5 pounds on my own hand poured bait.


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« Reply #2 on: February 10, 2020, 19:56:05 pm »

Mortar or rocket? 
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lloydsp
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« Reply #3 on: February 10, 2020, 21:43:37 pm »

Bob... I'm going to correct you (politely, I hope! <grin>).

The 'mortar' is the tube from which a 'shell' is fired.  Same in the military.  'Mortar rounds' go in mortars to be fired.

The shell was 58+ inches in diameter, and fired from a 62" mortar.  It took almost 15 seconds to reach apogee.  In fireworking jargon, we usually declare the mortar's size to be the shell size.

The shell weighed-in at 2797 lb.  The steel mortar from which it was fired weighs a bit more than 7 tons.

Lloyd
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Garyhlucas
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« Reply #4 on: February 11, 2020, 04:39:18 am »

How high did it go?
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Dragonfly
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« Reply #5 on: February 11, 2020, 09:05:35 am »

Saw it in the news last night. Absolutely spectacular!
And I said to my family: "I know a man who's in that business over there."  Smiley  Wink
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BR52
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« Reply #6 on: February 11, 2020, 12:09:15 pm »

Hi Lloyd,

Is that it!
https://www.skylighter.com/blogs/how-to-make-fireworks/aerial-shells

Or show a drawing of the object.

   Armando
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lloydsp
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« Reply #7 on: February 11, 2020, 12:59:36 pm »

Armando,
That's an old article by a personal friend (Ned Gorski) about how to make aerial shells (in general).

The shells he shows are at most 300mm in diameter.  The one that shot Saturday night was 1500 mm (1.5 M, yes!) in diameter!!!

Here are three 'stills' of the actual shell:
https://www.facebook.com/photo.php?fbid=3705591179465981&set=pcb.3705591619465937&type=3&theater

Lloyd
« Last Edit: February 11, 2020, 13:06:38 pm by lloydsp » Logged

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Bob La Londe
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« Reply #8 on: February 12, 2020, 00:10:35 am »

To be fair... to me... I wasn't asking if it was a mortar or a rocket.  I was asking which delivery system. 

Posting with my thumbs from my phone I tend to abbreviate a bit. 
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Getting started on CNC?  In or passing through my area?
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lloydsp
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« Reply #9 on: February 12, 2020, 13:15:38 pm »

Ok...

It was definitely fired from a mortar.  It would require a fairly large rocket booster to lift nearly 3000lb of payload plus its own weight!

Lloyd
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