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noozles rockets???


Polumna

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hi dudes

 

 

i waant to know wether it is possible to create BP-rockets(sulfurless) without a noozle.

 

how would the rocket perform???

 

because i have often used rockets with noozles, but i just have CATO´S with them.

 

any advices on construction,etc would be great.

 

polumna

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Uh, I think you mean nozzleless. I have my doubts about how well just KNO3/charcoal would do. it's been my experience that sulfurless black powder burns much slower. Without a nozzle I don't think it would produce enough thrust to fly very far, or even take off at all. Now if you use a hot BP(not sulfurless), it will surely work just fine in a nozzleless rocket. My 3/8 nozzleless balsa bp rockets go like mad.

 

I use this formula:

72 KNO3

14 charcoal

13 sulfur

1 dextrin

 

Wet with 25%alcohol/water and granulate through screen. When dry I press this with my 1.5ton arbor press.

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Well, for true nozzleless rockets i'd really suggest the fastest ballmilled BP meal you have TBH. This is simply due to the fact that a lot of output gasses are required, especially if a payload is going to be used.

Then again, when i tried a nozzleless rocket engine with my fastest willow BP meal. Guess what? it CATOED big time!

In other words its best to maybe add some a small percentage of linseed oil to 1.slow it down a bit depending on your BP, and 2. helps to keep the BP together do to a lack of nozzle.

This seem logical to you?

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