35 replies to this topic

[Maxim]

Im probably going to be revising my equipment...

But you see my main problem is that i live in London and there is no where i can fire at all so my pyro experience has been limited and thus my progression has been slow.

[digger]

Im probably going to be revising my equipment...

But you see my main problem is that i live in London and there is no where i can fire at all so my pyro experience has been limited and thus my progression has been slow.

Slow is good, as you have to consider carefully everything that you do.

I guess London could pose a few problems on the firing front.

Don't let your location defeat you, but do try to stay on the right side of the law.

[PyroSkitz]

Is that 30 degrees with the peliter model, or 30 degree compleatly:s I'm confused sorry...

[digger]

Is that 30 degrees with the peliter model, or 30 degree compleatly:s I'm confused sorry...

With the Peltier jobbie.

[Maxim]

Ye well i did fire once in the park but from that point after hearing the launch of a 5 inch shell i decided to stay on the safe side of the law. I dont own a car and public transport with flash powder break shells is a no go. So now im a bit stuck but its a hobby i cant stop so now its essential for me to find other locations. I also don't know whether to build a star rolling machine or not, i feel pressing stars takes too long...

[crystal palace fireworks]

NOT TRUE NECESSARY TRUE, a proper dehumidifier will not have this problem at such a low temperature as it has a refrigeration cycle within it. In fact the higher temperature will help the dehumidifier work as the vapour pressure of the moisture will be higher at the elevated temperature (allowing the water to evaporate more quickly), a second useful effect is that the air can hold more moisture at the elevated temperature allowing the dehumidifier more to go at.

Of course this will not work with as well with PELTIER cell dehumidifier as they can only maintain a certain temperature difference across the cell so they won't work properly at high temperatures. All the more reason to go for a proper dehumidifier.

One thing to note if you have this problem, is that you can run the device on a timer to control temperature and you should make the cabinet a good size giving it a reasonable surface area to dissipate heat. Also these devices should always be in a suitable location and NEVER inside your house, a shed at the bottom of the garden should do.

I have a refrigerant cycle dehumidifier and it will dry a 12mm star or 1 inch comet in less than 24 hours at an average temperature of 33C

Digger,

Any chance of posting a few photos of your de-humidifier set-up?

Question; Is it not possible/safer/better to have the de-humidifier outside the drying box linked by a flexible hose (bit like a washing machine/dryer hose you put outside a window), this could have a inline filter, but rembering to drill a few hole in the box to even the pressure?

[rocketpro]

Ye well i did fire once in the park but from that point after hearing the launch of a 5 inch shell i decided to stay on the safe side of the law. I dont own a car and public transport with flash powder break shells is a no go. So now im a bit stuck but its a hobby i cant stop so now its essential for me to find other locations. I also don't know whether to build a star rolling machine or not, i feel pressing stars takes too long...

You could always hand roll your stars in a round bottomed bowl, it`s not too difficult, and very rewarding.

[dr thrust]

Im probably going to be revising my equipment...

But you see my main problem is that i live in London and there is no where i can fire at all so my pyro experience has been limited and thus my progression has been slow.

yep good plan revise it to the bin , most drying boxes ive seen follow a simple design, ie a large wooden cupboard with wire racks so the air can flow around them drying boxes i personally don't use a dehumidifier, and rely solely on a bulb in the bottom of the cabinet which is contained in a"bulkhead" fitting for safety, which i run on a timer using cheap rate nigh time power, got save the pennies you know lol

[PyroSkitz]

ok this is just a few pictures of what my drying cabinet looks like, it will cost £70 in total when i get the dehumidifier, it is currently using a room heater which turns itself of when it gets to a certain temperature, then turns itself back on when the temp drops, so its actually quite useful (just a test to see if the photos upload or not..) its not oviously going to be used like this for obvious saftey issues, its just a demo picture
hope you like it

Edited by PyroSkitz, 04 April 2010 - 06:40 PM.

[dr thrust]

very nice,look at putting a simple wooden frame around your drying screens, so you can slide them in and out, and not gash your hand open when reaching in lol,i know your pics are a mock up, but remember that as the stars dry there will be " pyro debris/dust" falling off the stars/comets landing on whatever is beneath!

Edited by chris m, 04 April 2010 - 07:12 PM.

[digger]

Is that an open element room heater? If so get it out of there. The last thing you want is something with a glowing element near pyro.

[PyroSkitz]

Is that an open element room heater? If so get it out of there. The last thing you want is something with a glowing element near pyro.

as i said its just a demo, NOT REAL lol , just an idea of what it should look like, those frames are for sizing my black powder not actually for holding the stars, and the frames will be built when i have my screens/chicken mesh or what ever, the wood is waiting besides the cabinet ready to be put into frames , and dont be alarmed the heater wasnt switched on just its there to show what the dehumidifier will do, i was just mentioning some of the benefits of that room heater for actual use in my pryo room not in a cabinet , and about the falling debris of pyro the very last screen (screen number 8) will be like 400mesh or the finest i can get hold of to catch all the debris to be "properly" disposed of lol

thanks for having a look
George

[digger]

By the way the ignition temp of BP lies between 250C and 300C. This does not mean that it is safe to heat close to this temperature. The flash point of sulphur is 160C so if you heated BP to this temp and sustained it, it would more than likely light.

Be sensible finding out the flash point of a product does not mean you should push your luck. ALWAYS MINIMISE RISK, BE SENSIBLE, STAY ALIVE.

Edited by digger, 04 April 2010 - 11:20 PM.

[PyroSkitz]

By the way the ignition temp of BP lies between 250C and 300C. This does not mean that it is safe to heat close to this temperature. The flash point of sulphur is 160C so if you heated BP to this temp and sustained it, it would more than likely light.

Be sensible finding out the flash point of a product does not mean you should push your luck. ALWAYS MINIMISE RISK, BE SENSIBLE, STAY ALIVE.

thank you for your safety concern, the cabinet wont go near 160degrees, maybe 40 maximum i am hoping for, so i don't have to try and regulate the temperature, i am considering putting some computer fans inside the box to help circulate the air

not using heating, i mean using the dehumidifier, apparently they put out a bit of heat, iof thats what your meaning...

Edited by PyroSkitz, 06 April 2010 - 02:00 PM.

[Karl Mitchell-Shead]

Good old room temperature is all you need to dry comps