Patrick

I can't seem to find the equation for figuring the nozzel size for a rocket. I know you take the ID of the rocket multiplied by a fraction, but I don't remember what the fraction is.

I just don't remember where I found it, if it was here, or at Passfire. Any input would be fine.

This is for a regular BP rocket.

Thanks,

Patrick

Okay, I have a simple question regarding the name of an affect.

It looks like a colored comet and when it hits its peak it breaks into two or three stars. It's a common effect, but I can't find what its called. I was thinking a splitter, but not sure.

Thanks,

Patrick

When reading some formula's they explain to do the following (or similar) "dampen it using only 8% water. I like to add 5% alcohol to the water".

Dampening with 8% water .. 8% of the composition weight? ie - 100g of comp - 8g of water? BUT, then it would be described as 8 parts of water ...

Then adding 5% alcohol to the water, that would be volume.

Thanks,

Patrick


The above came from passfire under the 4" comet.

Here is a chemical supplier that has a few useful pyro chemicals and they are cheap!

5 lbs of STEARIC ACID for $8.75

http://www.chemistry....com/index.html