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#51 2006-01-25 9:20 pm
Re: Good rocket nozzle material....
Do it at night, and take pictures! Oh man, that would be cool.
"I'd rather be told, 'Have a nice day.' by someone who doesn't mean it, than 'F*** you!' by someone who does." - Lewis Black
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#52 2006-01-25 10:20 pm
- Fried Chicken
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- From: Good question - keeps changing
- Registered: 2003-11-17
- Posts: 4557
Re: Good rocket nozzle material....
jeff-o wrote:
Do it at night, and take pictures! Oh man, that would be cool.
That's what I want to do... But what I will probably do is have a rocket, and have a piece of magnesium ribbon sticking at the other end of the rocket, and hopefully at the end of the burn, the magnesium will be ignited, and slowly fall back to earth, while burning. That would be cool. But it wouldn't be my first attempt. Another time, the magnesium went out.
Just because something is legal, doesn't mean it's right. Just because something is illegal, doesn't mean it's wrong.
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#53 2006-01-26 5:35 am
Re: Good rocket nozzle material....
Um, I would suggest making sure that the magnesium is burnt out long before it reaches the ground again. That smurf burns so hot, it could ignite anything on fire! Best to have it burning as the rocket rises, rather than when it falls.
"I'd rather be told, 'Have a nice day.' by someone who doesn't mean it, than 'F*** you!' by someone who does." - Lewis Black
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#54 2006-01-26 7:45 am
- Fried Chicken
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- From: Good question - keeps changing
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- Posts: 4557
Re: Good rocket nozzle material....
jeff-o wrote:
Um, I would suggest making sure that the magnesium is burnt out long before it reaches the ground again. That smurf burns so hot, it could ignite anything on fire! Best to have it burning as the rocket rises, rather than when it falls.
That puts the magnesium out, I think.... I'm not sure how I can attach the magnesium to the rocket, and have it still keep burning.
Just because something is legal, doesn't mean it's right. Just because something is illegal, doesn't mean it's wrong.
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#55 2006-01-26 9:18 am
- TheMouthOfSauron
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- From: The Pas, MB, Canada
- Registered: 2002-02-25
- Posts: 659
Re: Good rocket nozzle material....
If you're still thinking of cement, you may want to check if a local hardware store has any broken bags. If they do, they may be willing to sell you a small amount rather than a full bag.
"Infinity is not a number! Infinity simply describes the way in which this [function] does not exist."
-Alex Chigogidze
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#56 2006-01-26 4:57 pm
- Fried Chicken
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- From: Good question - keeps changing
- Registered: 2003-11-17
- Posts: 4557
Re: Good rocket nozzle material....
TheMouthOfSauron wrote:
If you're still thinking of cement, you may want to check if a local hardware store has any broken bags. If they do, they may be willing to sell you a small amount rather than a full bag.
Well, I'm sure a small hardware store wouldn't mind, but it would be kind of stupid at Home Depot or Lowes to ask.
Just because something is legal, doesn't mean it's right. Just because something is illegal, doesn't mean it's wrong.
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#57 2006-01-27 10:04 pm
- Kosh
- The Enigmatic One
- From: Somewhere on or near Earth
- Registered: 2003-01-18
- Posts: 633
Re: Good rocket nozzle material....
Depending on how you were planning on forming the nozzle, you might also look into high-temperature epoxies, especially if you aren't planning on reusing the nozzles.
For example, J-B Weld is spec'd at around 600°F for 10 minutes. Even though your propellant will likely be much hotter than this, it only has to last for a minute or less. You can find this at most auto-parts stores, Wally World, etc.
You can get higher-temperature epoxies; here's a sample from a quick Google search (scroll down).
They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.
-- Benjamin Franklin, 1759
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#58 2006-01-29 2:52 pm
- Fried Chicken
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- From: Good question - keeps changing
- Registered: 2003-11-17
- Posts: 4557
Re: Good rocket nozzle material....
Kosh wrote:
Depending on how you were planning on forming the nozzle, you might also look into high-temperature epoxies, especially if you aren't planning on reusing the nozzles.
For example, J-B Weld is spec'd at around 600°F for 10 minutes. Even though your propellant will likely be much hotter than this, it only has to last for a minute or less. You can find this at most auto-parts stores, Wally World, etc.
You can get higher-temperature epoxies; here's a sample from a quick Google search (scroll down).
That looks interesting, but I'm not sure if I want to spend that much money on epoxies, it just kind of seems like a waste for me. 
But thanks anyway 
Just because something is legal, doesn't mean it's right. Just because something is illegal, doesn't mean it's wrong.
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#59 2006-01-29 4:46 pm
- TheConfuzed1
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- Registered: 2000-04-19
- Posts: 20194
Re: Good rocket nozzle material....
You'll shoot your eye out.
The storm starts when the drops start dropping. When the drops stop dropping, the storm starts stopping.
Last Fm
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#60 2006-01-29 6:59 pm
- Fried Chicken
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- From: Good question - keeps changing
- Registered: 2003-11-17
- Posts: 4557
Re: Good rocket nozzle material....
TheConfuzed1 wrote:
You'll shoot your eye out.
I'm sure.
Just because something is legal, doesn't mean it's right. Just because something is illegal, doesn't mean it's wrong.
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#61 2009-06-08 5:26 am
- Bizzarre
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- Registered: 2009-06-08
- Posts: 1
Re: Good rocket nozzle material....
Hey man, if you're talking about a good material for a nozzle in a rocket that will allow you to drill through it and which doesn't melt or burn away by the heat of the propellant, listen good.
Catlitter.
When poured into something like a PVC tube, take something massive and long that fits in the pvc tube. make sure it sticks out a couple of centimeters. Bash it a couple of times with a hammer to flatten the kittylitter,
but not too hard because it can break your pvc tube.
Before smashing it with a hammer, be sure to use enough catlitter so that it will be atleast 1.5 cm thick (in a standard small pvc tube) when smashed.
Notice how hard the catlitter has become. You can drill a hole in it (sometimes it crumbles abit when drilling).
You can always mix the non-stomped catlitter with a little glue just to reduce the crumbling when drilling it ( i haven't tried the glue-thing myself, its just a theory).
I hope my story was understandable, im Dutch and I'm not the best explainer XD .
Good luck with he rockets!
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