dagabu Posted February 28, 2012 Share Posted February 28, 2012 I am guessing it was done by vacuum, but not ordinary, manufactured vacuum, because of the hazardous particles. I suspect a lab. vacuum pump, or a vacuum created by air or water pressure, if the tubing did not collapse.. A vacuum container would solve that issue. As in create a hard vacuum in a vessle, seal it with a butterfly valve, hook up tube and open valve. WINNER, WINNER, Chicken Dinner! It was a regular vacuum as I understand it into a water bath where the flash was rendered harmless. Good job guys, -dag Link to comment Share on other sites More sharing options...
pyrojig Posted February 28, 2012 Share Posted February 28, 2012 WINNER, WINNER, Chicken Dinner! It was a regular vacuum as I understand it into a water bath where the flash was rendered harmless. Good job guys, -dag AHHH, too late , I was going to suggest doing it the manly way >>>> Pulling it through with your teeth.... One guy pulled a jet fighter in the guineas world records......Maybe we should call him for the job. Link to comment Share on other sites More sharing options...
dan999ification Posted February 28, 2012 Share Posted February 28, 2012 chicken dinner, i was only getting a cookie dan. Link to comment Share on other sites More sharing options...
gelamex Posted February 29, 2012 Share Posted February 29, 2012 Some types of superglue will coat surfaces through 'evaporation' when this occurs in a low pressure environment. It is used in certain other applications prior to the exposed surface being dusted. Link to comment Share on other sites More sharing options...
pyrojig Posted March 1, 2012 Share Posted March 1, 2012 Some types of superglue will coat surfaces through 'evaporation' when this occurs in a low pressure environment. It is used in certain other applications prior to the exposed surface being dusted. Sounds to reactive and expensive for coating a few hundred feet of tube, IMO. But a interesting point no less. Link to comment Share on other sites More sharing options...
gelamex Posted March 1, 2012 Share Posted March 1, 2012 Its a procedure used in very specialised applications. It takes little glue to make a huge surface area sticky and it certainly holds superfine Al powder without reaction problems. Its main problem for this type of application is that it takes some time for the surface to get exposure although that problem could be dealt with by ensuring pressure within the tube is dropped very suddenly. Just a thought from a different field. Link to comment Share on other sites More sharing options...
dan999ification Posted March 1, 2012 Share Posted March 1, 2012 fingerprints. dan. Link to comment Share on other sites More sharing options...
gelamex Posted March 1, 2012 Share Posted March 1, 2012 Aye, that is one use. There are quite a few others too. Link to comment Share on other sites More sharing options...
pyrojig Posted March 2, 2012 Share Posted March 2, 2012 LOL depends on who your mad at ...... Could end up as a long visit in the bathroom ....Planted to the thrown . Link to comment Share on other sites More sharing options...
dagabu Posted March 2, 2012 Share Posted March 2, 2012 Some types of superglue will coat surfaces through 'evaporation' when this occurs in a low pressure environment. It is used in certain other applications prior to the exposed surface being dusted. Super Glue (cyanoacrylate) fumes, it is not evaporating. It coats items that it can stick to like oils and such but low pressure has nothing to do with it unless you are drawing it down a tube with a low vacuum. Heat cyanoacrylates under 210° F at sea level and it fumes, heat it above boiling and it breaks down and can produce *cyanide gas. Water is also important to the cyanoacrylate to stick to anything as it takes water to cure it. -Fuseo Matsumura - *not known if this is actually cynaide gas or a gas with similar effects. -dag Link to comment Share on other sites More sharing options...
gelamex Posted March 2, 2012 Share Posted March 2, 2012 Low pressure is used to draw it into locations such as hidden recesses. It should work with tubing also, although I am not sure how efficiently with the bore sizes we are talking about. By using low pressure the temps involved can also be much lower. As for water ensuring cure; yes, but in the environment it is being used the ambient humidity averages 70-90%. Sufficient moisture to ensure a cure. Link to comment Share on other sites More sharing options...
Jwdrummer5 Posted March 3, 2012 Share Posted March 3, 2012 (edited) Interesting idea using shock tube and all but Mumpyro from North Dakota used a single 4 ply cotton string saturated in flash (wet and bound with dex or CMC then dried before inserted) and pulled through 1/4" plastic tube (many different ones have been used) , e-matched and plugged (we used BP and epoxy for plugs) at PGI last summer. We copied his design for the fall shoot last year and made a dozen lengths that all worked just like a shock tube with a flame front of about 1000' a second and a nice POP! when lit. The only secret is how to get the coated string down the tube. -dag use a Rat: tie a cotton ball to the end that is inserted into the tube, then use a vacuum to pull it through the tube. oops. too late Edited March 3, 2012 by Jwdrummer5 Link to comment Share on other sites More sharing options...
Arthur Posted March 3, 2012 Share Posted March 3, 2012 Connercial shock tube is a plastic tube with an interior fine coating of a HE and Aluminiun mix, at about 6g per kilometer -now that is very little! So little that in the UK it is off ticket and can be bought from blasting suppliers. There was a system in the UK for triggering fireworks with shocktube but it is almost un-used now. It's easy to set it off but less easy to transition back to a fire front from the shockwave of the shocktube. Link to comment Share on other sites More sharing options...
oldguy Posted March 3, 2012 Author Share Posted March 3, 2012 Connercial shock tube is a plastic tube with an interior fine coating of a HE and Aluminiun mix, at about 6g per kilometer -now that is very little! So little that in the UK it is off ticket and can be bought from blasting suppliers. There was a system in the UK for triggering fireworks with shocktube but it is almost un-used now. It's easy to set it off but less easy to transition back to a fire front from the shockwave of the shocktube. I started a thread in HE on Nonel shock tube.Non-commercial transistion back to a fire-front from the ignition end of the tube should not be difficult, at least to those experianced. Link to comment Share on other sites More sharing options...
Recommended Posts