Nozzles

[PyroMedia]

Hey, sorry about starting a new thread, but i couldn't find anything.

 

I just received some 3/4 inch and 5/8 inch tubes, and i was wondering what size nozzles i should be using. i know there's a chart somewhere but it couldn't be found.

 

Thanks.

[Mumbles]

Usually 1 ID thick, and 1/3 ID wide of a hole for core burning BP rockets. Probably around 1/4 ID for end burning BP rockets. Not much else has a nozzle.

[PyroMedia]

So, for the 3/4 inchers i should be using a 1/4 inch nozzle right?

[Mumbles]

If you are making black powder end burners, that is a good place to start. It can be tweaked for performance of course.

[lostfido]

A ton of good info along w/a really fun simulator program that lets you design and "fly" your rocket before actually building it, is here: http://exploration.grc.nasa.gov/education/rocket/bgmr.html

 

 

Thanks for the great link, looks like I have another place to add to my research.

[PyroMedia]

http://exploration.grc.nasa.gov/education/...t/rockpart.html

 

fuel/oxidiser needs to be mixed, silly NASA.

 

(im going to look really stupid if im wrong somehow.)

[Mumbles]

They are mixed, just stored separately. They are sprayed into the combustion chamber where they are burned and thus thrust is generated. The chemicals are so reactive, and often gases, it would be unwise to store them together.