Simple new staging mechanism
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Re: Simple new staging mechanism
So how well does it work? Did anyone test this? Does the pin hole nozzle on the sustainer produce enough thrust? Any videos?
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Re: Simple new staging mechanism
It works quite well. I only did one small test launch with the exact stager from this thread, but the staging mechanism worked flawlessly. I also made a rocket last year which almost broke the class B record with a very similar stager. Here is a launch with video http://www.wra2.org/forum/viewtopic.php?f=53&t=1044 and here is a launch that broke the record, but didn't officially qualify because my camera didn't work http://www.wra2.org/forum/viewtopic.php?f=53&t=1080. That rocket had a similar size nozzle to the nozzle on this thread. And you should note that Millenium V (or is it VIII?), the current class B record holder, only used a 1/16" diameter nozzle.
Alex
Alex
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Re: Simple new staging mechanism
Is that 1/16" a typographical error? That seems awfully small even for a sustainer. At least not for a rocket with no reinforcement.SaskAlex wrote:It works quite well. I only did one small test launch with the exact stager from this thread, but the staging mechanism worked flawlessly. I also made a rocket last year which almost broke the class B record with a very similar stager. Here is a launch with video http://www.wra2.org/forum/viewtopic.php?f=53&t=1044 and here is a launch that broke the record, but didn't officially qualify because my camera didn't work http://www.wra2.org/forum/viewtopic.php?f=53&t=1080. That rocket had a similar size nozzle to the nozzle on this thread. And you should note that Millenium V (or is it VIII?), the current class B record holder, only used a 1/16" diameter nozzle.
Alex
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Re: Simple new staging mechanism
No error. According to the website (http://web.archive.org/web/200010060552 ... millen.htm) Millenium VIII had a 1/16" nozzle. And it was only launched at 90 psi. I agree though, that is really small.U.S. Water Rockets1 wrote: Is that 1/16" a typographical error? That seems awfully small even for a sustainer. At least not for a rocket with no reinforcement.
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Re: Simple new staging mechanism
It's possible but that tiny size just doesn't seem right.SaskAlex wrote:No error. According to the website (http://web.archive.org/web/200010060552 ... millen.htm) Millenium VIII had a 1/16" nozzle. And it was only launched at 90 psi. I agree though, that is really small.U.S. Water Rockets1 wrote: Is that 1/16" a typographical error? That seems awfully small even for a sustainer. At least not for a rocket with no reinforcement.
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Re: Simple new staging mechanism
Nice you kept it simple! If you get a chance to build another rocket I'd like to see some video of the launch.
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Re: Simple new staging mechanism
Is it even possible to generate enough thrust with a nozzle that size!?!?!
I would really like to see a video (from ground of the separation.)
I would really like to see a video (from ground of the separation.)
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Re: Simple new staging mechanism
A second stage doesn't need to make much thrust. It only needs to make sufficient thrust to maintain speed. The boosters use large thrust to accelerate the rocket and the sustainer uses minimum thrust to sustain the speed for as long as possible.Lasheyda wrote:Is it even possible to generate enough thrust with a nozzle that size!?!?!
I would really like to see a video (from ground of the separation.)
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Re: Simple new staging mechanism
Oh...(should have known that )U.S. Water Rockets1 wrote:A second stage doesn't need to make much thrust. It only needs to make sufficient thrust to maintain speed. The boosters use large thrust to accelerate the rocket and the sustainer uses minimum thrust to sustain the speed for as long as possible.Lasheyda wrote:Is it even possible to generate enough thrust with a nozzle that size!?!?!
I would really like to see a video (from ground of the separation.)
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Re: Simple new staging mechanism
No big deal. Just look at the rockets which have launched into space and think how they are similar. The Space shuttle for example has two huge boosters that fall off and 3 main engines with a lot less thrust. Once the boosters get the shuttle up to speed they fall off and let the main engines hold the speed.Lasheyda wrote:Oh...(should have known that )U.S. Water Rockets1 wrote:A second stage doesn't need to make much thrust. It only needs to make sufficient thrust to maintain speed. The boosters use large thrust to accelerate the rocket and the sustainer uses minimum thrust to sustain the speed for as long as possible.Lasheyda wrote:Is it even possible to generate enough thrust with a nozzle that size!?!?!
I would really like to see a video (from ground of the separation.)
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Re: Simple new staging mechanism
Awesome! Very cool (and simple) mechanism! Good work!
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Re: Simple new staging mechanism
I wonder if this would work with no water in the sustainer, to act as parachute deploy mechanism, or perhaps just a small amount of water to delay depressurization. Guess it could do both... My list of things to try just keeps growing!
Bugwubber
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Re: Simple new staging mechanism
It WAS just a little itty bitty nozzle. I know , because I am the guy with the hat on helping Bruce B. set up for launch at the Poway Powow launch fest many years ago. Many of us were running reduced nozzle diameters at the time.
My 2 liter one stagers worked very well at 3/8". I wonder what Bruce is up to. He is REALLY a sharp guy!
My 2 liter one stagers worked very well at 3/8". I wonder what Bruce is up to. He is REALLY a sharp guy!
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Re: Simple new staging mechanism
I'll have to give this a try. I keep failing with the more complicated stagers... mostly due to poor instructions during the more complicated construction steps (I'm looking at you aircommand).
"Houston, we've had a problem..."
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