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Hi peeps,

I have not done much research into this however i am yet to find actual proof of mortar tube degredation. Basically having set up my own small display company I am looking at safety, obviously this is the main priority.

What I want to know is after how many shells, or how long a tube is used does it become unsafe and at risk from the lift rupturiong the tube and resulting in a shell on the ground.

I know we have safety distances in place to lessen the chance of anyone being injured in such an event, however I want to know when my tubes are due for renwal.

Is there any data out there thats been carried out to determine this? There are obviously loads and loads of variables ect.. but as a base line i was thinking of buying two tubes from the same supplier of the same size. Keeping one brand new and firing X ammount of shells from the other. Then testing them both via a three point bend test with a fast head speed. ( i word for a materials testing company Exova) so i have access to the kit and the expertese.

From these tests we can determin or hopefully determine a % decrease of flexural strength along a lateral plain, it opens up a massive can of worms with reards to where on the tube the samples are taken from and testing the base of the tube where the wall is bonded ect........ I dont have the time to be going into massive detail with it just after an idea of how much strength they loose over X ammount of shells.

You also get influences from the residue so i could have some FTIR tests done to determing that degridation aswell however only if I have the time and the info isnt allready out there?

What do you guys think?

Jay

So guy's/Gal's how many of you actually have firerworks of some description to celebrate the bringing in of the new year? I do every year with about the same value in fireworks as bonfire night ( £250-£400)? And whats your preferred method of display design, for example on bonfire night I make it all last around half an hour but on New years its all over in 3-5 mins

Jay

Hi people,

A question for the pro's really but any ideas are welcome. What do you use for stakes? What kind of wood, metal or other materials do you use? wheres a good place to source the materials ect..........




Jay

Hi pyro ppl,

So how many of you will be having fireworks to celebrate the royal wedding tomorrow? I might let a few off just to get my fix