No! to Backyard Fireworks

[zippyt]

bonfire toffee
Never heard of that befor , I Looked it up ,
http://www.fireworks.co.uk/party/recipes.html
Sounds Tasty , I may have to try it

[xoxoxoBruce]

From a very detailed article, on how to build homemade fireworks, from a 1936 Science & Mechanics magazine.

IN making fireworks, if the experimenter will always remember that he is dealing with explosives that may pop off at any moment, and therefore exercises constant caution, the various spectacular night displays outlined in the accompanying article are not any more dangerous than playing with matches. At all times, care must be exercised in grinding the ingredients. Always use a clean mortar; always powder each chemical separately; when mixing, dump the required portions on a sheet of dry paper and use a wooden spatula, or gently rock the contents of the paper back and forth. Although the author is only fifteen years old he has been making fireworks for years and has not yet had one of them go off accidentally. The formulas contained in this article have all been tried and tested, and will be found to work perfectly.

[BrianR]

Cloud failed to mention t hat gunfire tonight is a popular diversion for some folks. I always get nervous when firearms are going off (into the air, natch) and those bullets have to come down somewhere...

I know that the projectile will have spent it's energy by the time it falls back to Earth, but what if the Yoyo who fired it was not at full elevation? It could be a line drive to my noggin!

And I live close to her now...closer than before.

Brian

[footfootfoot]

Originally Posted by BrianR

Cloud failed to mention t hat gunfire tonight is a popular diversion for some folks. I always get nervous when firearms are going off (into the air, natch) and those bullets have to come down somewhere...

I know that the projectile will have spent it's energy by the time it falls back to Earth, but what if the Yoyo who fired it was not at full elevation? It could be a line drive to my noggin!

And I live close to her now...closer than before.

Brian

I think you snoozed through physics class, Brian. If you shoot a bullet straight up in the air, it loses its energy at the apogee of its arc. When it reaches the ground it is going just as fast as when it left the barrel. A flat trajectory, not so.

Avoid the knuckle heads in the first place.

[BrianR]

Originally Posted by footfootfoot

I think you snoozed through physics class, Brian. If you shoot a bullet straight up in the air, it loses its energy at the apogee of its arc. When it reaches the ground it is going just as fast as when it left the barrel. A flat trajectory, not so.

Incorrect, although the bullet will regain some momentum, it will not regain it all. Yes, there is a moment a the top of the arc when the bullet is motionless, and there is an acceleration curve on the way down, the final velocity is nowhere near the initial velocity. Had I not snoozed through physics, I could even offer equations to prove this. Someone else will have to do it for me.

[xoxoxoBruce]

32 ft per second squared, but ya gotta know how high it went.

[morethanpretty]

Most cities around here don't allow fireworks w/in the limits, but its usually about a 15min drive to a county that allows them. There are fireworks stations set up with a field next to them for people to set their stuff off in. That is some scary shit. My dad, bf, and I went out to one one year, we hung around the firemen my dad is friends with. Usually we do set off fireworks at our house and have a little party with family and friends. My dad is a super nazi about safety though and so far no minor injuries even. This year we're goin out to my brother's new place and he's throwing a huge party that's BYO fireworks, not to sure about it, but since its his farm (someday) then he'll probably be pretty active about safety.

[DanaC]

I posit it's fear of the unknown, because you have never learned how to handle them and how you really have to screw up to get hurt.

More importantly, Bruce, I am aware of how little you have to screw up for someone to get hurt. My mum still has the scar from the rocket that went into her stomach when she was 8. Not, I might point out, because people were messing about and acting unsafely, but at a small neighbourhood display when the rocket slipped down just before it launched.

I have handled fireworks. I have handled them for my niece's sake. I still hate them :P

@ 3foot: indoor fireworks were a fad during the late-70s and 80s. They are not explosive lol. There's one that sits there as a little pyramid and when you light it it fizzes and turns into a volcano effect. Another one you set alight and it spews stuff out in a snake shape......oh and of course the ubiquitous sparklers

http://www.fireworksarcade.co.uk/indoor-fireworks.html

[xoxoxoBruce]

Originally Posted by DanaC

I have handled fireworks. I have handled them for my niece's sake. I still hate them :P

Well, you're going to be a big help when the revolution comes.

[DanaC]

*grins* I've already decided my role in the revolution will be that of Sleeper :P



as an aside: I am actually far more comfortable handling guns than fireworks.

[xoxoxoBruce]

Well glory be... next you'll be telling us you chew tobacco, too?

[DanaC]

*grins* nope, but I do have a fondness for rough shag (tobacco:P)

[bluecuracao]

I've always loved fireworks, but I don't understand these dumbasses who miss/ignore the concept of bottle rockets.

When I was a kid, adults would actually put them in bottles before lighting them, make us all stand back, and the rockets would go off on a specific trajectory before exploding.

Now, there are idiots who think it's fun to light the the bottle rockets while they're in hand, and throw them. Woo hoo, they go all over the place, and you have no idea where they're going to end up. Ha ha, look at everyone run away, trying to avoid getting burned.

[Clodfobble]

It goes as high as it can get with -32 ft/sec squared pulling down on it, and thus it has that same distance and time to re-accelerate on its way back down. The only way it would not match its initial velocity when it comes back down is if it hits terminal velocity for a piece of metal that size and weight.

[HungLikeJesus]

Except that it will be loosing energy due to wind resistance in both directions.