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Unread postAuthor: Technician1002 » Fri Mar 11, 2011 3:35 pm

Producing a low delay igniton is not difficult and does not require the long runs of HV wires. Standard insulation for low voltage use is sufficient and voltages in the 100 to 300 volt range work fine for producing a high current discharge for low lag ignition.

Design with the high current portion having short leads so the wire resistance as well as inductance is minimal.

Using disposable camera flash units provides all the nessary circuitery to provide the hard to make high voltage generation and energy storage needed.

Remove the original flashtube and use just the inverter and flash cap. Add the high current SCR. the SCR triggering can be completed with the output of your timing circuit. The high voltage and current can heat a fine wire to incandescence in less than a few hundred nanoseconds.

A home made electric match can then be triggered with explosive speeds.

Standard low voltage wire can be used for the long runs from the timer sequencer and the CDI ignition used to trigger the events. If you use standard RF transmission line termination practices for the signal line, reliable propagation delays will provide trigger speeds with the absolute minimum delay.

Propagation delay in standard twisted pair network cable is in the order of 2/3 the speed of light, a minimum delay indeed.

Standard CAT 5 network cable can be used to initiate charging of the HV units, monitor the charge state, and trigger the discharge sequence of events.
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Unread postAuthor: SpudBlaster15 » Fri Mar 11, 2011 4:50 pm

It's not the variations in current transmission delays that I'm worried about. These can be minimized to the point of insignificance with even mediocre circuit design. The concerning aspect is the construction of the electric blasting cap itself. If tightly controlled assembly techniques are not used, you end up with units that have widely variable delays between the application of current to the wire leads and the detonation of the base charge.

I'm not saying it's impossible or even difficult for a skilled individual to assemble consistent caps, but it's quite different from traditional design standards, where placing a nichrome wire in contact with the surface of a pressed primary charge and applying a low voltage is perfectly suitable.
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Unread postAuthor: ramses » Fri Mar 11, 2011 10:33 pm

True. I would think it'd be as simple as crystallizing some HE into steel wool and zapping it with the above mentioned camera flash. All circuits could be near the blast site. That would allow you to design an explosive-resistant case as well. :D

If gasoline is designed to avoid autoignition, would diesel be suitable? I know it will compression ignite at a compression ratio of 15:1, which should be achievable with HE. Add to it extra heat from radiation, and it should work.
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Unread postAuthor: Technician1002 » Sat Mar 12, 2011 12:24 am

Diesel oil burns at a slower rate than gasoline. It does compression auto ignite at about 1/2 the temperature of gasoline. Due to the much higher burn rate of gasoline, at higher compression, it does detonate and produces destructive engine knock.
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Unread postAuthor: Crna Legija » Tue Mar 15, 2011 4:16 am

Does anyone know the dimensions of a weaver rail?
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Unread postAuthor: jackssmirkingrevenge » Tue Mar 15, 2011 4:44 am

-_- wrote:Does anyone know the dimensions of a weaver rail?


here.
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Unread postAuthor: Crna Legija » Tue Mar 15, 2011 5:25 am

sweet thats exactly what i was looking for. :cheers:
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Unread postAuthor: SpudBlaster15 » Wed Mar 16, 2011 4:41 pm

Welcome all to the SB15 Institute of Chemistry Education.

In today's lecture, we'll be looking at chemical bonding in ionic compounds.

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Unread postAuthor: Labtecpower » Thu Mar 17, 2011 10:39 am

FFFFFFFUUUUUUUU!!!!!!


I liked this one;

His practice has no room for new patients! Now, he's a medical wizard!

I love this Doctor

Image

Q: Doctor, I've heard that cardiovascular exercise can prolong life. Is this true?

A: Heart only good for so many beats, and that it... Don't waste on exercise. Everything wear out eventually. Speed up heart not make live longer; that like say you can extend life of car by driving faster. Want live longer? Take nap.



Q: Should I cut down on meat and eat more fruits and vegetables?

A: You must grasp logistical efficiencies. What does cow eat? Hay and corn. What are these? Vegetables. So, steak nothing more than efficient mechanism of delivering vegetables to system. Need grain? Eat chicken. Beef also good source of field grass (green leafy vegetable). And pork chop can give 100% recommended daily allowance of vegetable products.



Q: Should I reduce my alcohol intake?

A: No, not at all. Wine made from fruit. Brandy is distilled wine. That means they take water out of fruity bit; get even more of goodness that way. Beer also made out of grain. Bottoms up!



Q: How can I calculate my body/fat ratio?

A: If you have body and you have fat, ratio is one to one. If you have two bodies, ratio is two to one, etc.



Q: What are some of the advantages of participating in a regular exercise program?

A: Cannot think of single one, sorry. My philosophy: No Pain...Good!



Q: Aren't fried foods bad for you?

A: YOU NOT LISTENING!!! .... Foods fried in vegetable oil. How getting more vegetables be bad for you?



Q: Will sit-ups help prevent me from getting a little soft around the middle?

A: Definitely not! When you exercise muscle, it get bigger. You should only do sit-ups if want bigger stomach.



Q: Is chocolate bad for me?

A: You crazy? HELLO .... Cocoa beans! Vegetable!!! Cocoa beans best feel-good food around!



Q: Is swimming good for your figure?

A: If swimming good for figure, explain whales to me.



Q: Is getting in-shape important for my lifestyle?

A: Hey! 'Round' is shape!



Well, I hope this has cleared up any misconceptions you may have had about food and diets.



AND.....



For those of you who watch what you eat, here's the final word on nutrition and health. It's a relief to know the truth after all those conflicting nutritional studies:



1. The Japanese eat very little fat

And suffer fewer heart attacks than Americans.



2. The Mexicans eat a lot of fat

And suffer fewer heart attacks than Americans.



3. The Chinese drink very little red wine

And suffer fewer heart attacks than Americans.



4 The Italians drink a lot of red wine

And suffer fewer heart attacks than Americans.



5. The Germans drink a lot of beers and eat lots of sausages and fats

And suffer fewer heart attacks than Americans.



CONCLUSION.....



Eat and drink what you like. Speaking English is apparently what kills you.
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 17, 2011 10:59 pm

Good ones :) makes me feel better about the massive "guinness burger" I consumed last night :roll:
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Unread postAuthor: JDP12 » Thu Mar 17, 2011 11:07 pm

haha those are awesome!
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Unread postAuthor: jackssmirkingrevenge » Thu Mar 17, 2011 11:26 pm

FEAR CHINA!

looks like we are not far off from UAV vs UAV combat, they're catching up :?
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Unread postAuthor: MrCrowley » Fri Mar 18, 2011 1:56 am

UNPLAYABLE


coz I know you guys are such big fans of cricket and all :D
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Unread postAuthor: jackssmirkingrevenge » Fri Mar 18, 2011 2:17 am

MrCrowley wrote:coz I know you guys are such big fans of cricket and all :D


Comments like this:

I have always admired Bond's bowling action; It has a subtle elegance to it.


prove the homosexuality of the sport (though poetry is the last refuge of the bearded, cricket-hating sodomite so it can get worse)

Make a hybrid cricket ball launcher out of scrap. It will be neither subtle, or elegant, and be infinitely better than cricket ;)
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Unread postAuthor: MrCrowley » Sat Mar 19, 2011 7:24 pm

Went to this rugby league game last weekend, highlight had to be this tackle:
[youtube]http://www.youtube.com/watch?v=7dxirUD4I7M[/youtube]
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