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joeranger
 Post subject: Rocket science
PostPosted: Sat Apr 21, 2007 11:42 pm 
Will 10lbs of thrust lift a 10lb rocket in the air or is it a different formula?
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What are you doing with a gun in space?
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Harry Harris
 Post subject: Re: Rocket science
PostPosted: Sun Apr 22, 2007 1:17 am 
Newton's third law staes that "For every action, there is an equal and opposite reaction."

Technically 10lbs of thrust shouldn't lift 10lb rocket as you'd need to account for the weight of the rocket. If the rocket weighs say 5lb then 5lbs of thrust should make it 'weightless', 16lbs should just about get it off the ground. Add more thrust for more lift.

Harry
[img]http://www.triotech.demon.co.uk/hhacabanner.gif[/img]Edited by: [url=http://p220.ezboard.com/bthealienslegacy.showUserPublicProfile?gid=harryharris>Harry Harris[/url] at: 4/23/07 8:42 am
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JediFraz
 Post subject: Re: Rocket science
PostPosted: Mon Apr 23, 2007 10:29 am 
Escape velocity calculation
-----------------------
My WebPage... Of d00m!

It's the 21st Century and where are the flying cars...??
-I was *promised* flying cars.....
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Wookiee Gunner
 Post subject: Re: Rocket science
PostPosted: Mon Apr 23, 2007 3:36 pm 
Why would it take 16lbs of thrust to lift a 5lb rocket?

Since thrust is counteracting gravity, shouldn't it take 6lbs? Thrust-Rocket Weight (6-5) equals effective thrust. Or am I oversimplifying (sorry, I'm not the rocket scientist in my group, that would be my buddy).
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Harry Harris
 Post subject: Re: Rocket science
PostPosted: Mon Apr 23, 2007 3:43 pm 
Quote:
Quote:Why would it take 16lbs of thrust to lift a 5lb rocket?
Because I made a typo!

Harry
[img]http://www.triotech.demon.co.uk/hhacabanner.gif[/img]
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Siderwinder forge
 Post subject: Re: Rocket science
PostPosted: Mon Apr 23, 2007 3:45 pm 
Not a good idea in rocket science Harry. :lol:

SAS
Anything that, in happening causes itself to happen, happens again.Edited by: [url=http://p220.ezboard.com/bthealienslegacy.showUserPublicProfile?gid=siderwinderforge>Siderwinder forge[/url]  Image at: 4/23/07 1:07 pm
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Bug Stomper
 Post subject: Re: Rocket science
PostPosted: Mon Apr 23, 2007 8:04 pm 
Ok, just for a little nitpicking:
Thrust would be lbf or N and mass is lbs or kg - this is often confused.

Cheers,
Stefan
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Harry Harris
 Post subject: Re: Rocket science
PostPosted: Mon Apr 23, 2007 8:07 pm 
I just answered the question dude! ;)

:lol:

Harry
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Ripstick
 Post subject: Re: Rocket science
PostPosted: Mon Apr 23, 2007 11:49 pm 
Okay -- air-speed velocities, typos, and nitpicking aside... you guys are missing the most obvious question:

<span style="font-size:medium;]What are you building Joe? ;)
Rick "Ripstick"

[img]http://www.propguild.com/ripstick/Ripstick_Aliens_Legacy_Banner_2007.jpg[/img]
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Rook 3
 Post subject: Re: Rocket science
PostPosted: Tue Apr 24, 2007 1:10 am 
Okay, admit it: You just saw "The Astronaut Farmer" didn't you? ;)

Russ

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falken1o8
 Post subject: Re: Rocket science
PostPosted: Tue Apr 24, 2007 1:11 am 
Ok..I'll bite
what are ya making Joe ??
Scott
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tonyandcherie
 Post subject: Re: Rocket science
PostPosted: Tue Apr 24, 2007 3:18 am 
It doesn't matter, the Government already knows because he's not wearing his aluminum foil helmet!!
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WDImagineer2b
 Post subject: Re: Rocket science
PostPosted: Tue Apr 24, 2007 12:57 pm 
What is it with aluminium foil helmets at the moment? :P
That same quote came up on the Steel guitar forum the other day!
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Siderwinder forge
 Post subject: Re: Rocket science
PostPosted: Tue Apr 24, 2007 1:03 pm 
[img]http://www.agirlsworld.com/rachel/beat-street/reviews/pix/signs2.jpg[/img]
Anything that, in happening causes itself to happen, happens again.
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joeranger
 Post subject: Re: Rocket science
PostPosted: Tue Apr 24, 2007 2:07 pm 
It is going to be good, hopefully I will have time to work on it this weekend. I am going to document the process.
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joeranger
 Post subject: Re: Rocket science
PostPosted: Tue Apr 24, 2007 2:10 pm 
Here is what I was looking for
NASA thrust caculator
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