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Model Forum / General / Rockets / March 2006Calculating the center of pressure for a known kit.
You people have been such a good and quick resource. I need a good concept/formula to calculate a CP for a large project. What's a quick and dirty way and also the classic way? Thank you The Rocketeer I use Rocksim by Apogee. Andrew > You people have been such a good and quick resource. I need a good > concept/formula to calculate a CP for a large project. What's a quick > and dirty way and also the classic way? > > Thank you > The Rocketeer There's also VCP: http://www.rocketry.org/software/details.php?software_id=29 http://www.nar.org/software.html  Signature"""Remove "zorch" from address (2 places) to reply. http://www.sirius.com/ > You people have been such a good and quick resource. I need a good > concept/formula to calculate a CP for a large project. What's a quick > and dirty way and also the classic way? > > Thank you > The Rocketeer http://my.execpc.com/~culp/rockets/Barrowman.html Not the quickest method but if you use an old fashioned pencil it might get a little dirty. Otherwise if you like clean I'm sure a spreadsheet would help. Cheers. Layne Rossi > You people have been such a good and quick resource. I need a good > concept/formula to calculate a CP for a large project. What's a quick > and dirty way and also the classic way? > > Thank you > The Rocketeer >You people have been such a good and quick resource. I need a good >concept/formula to calculate a CP for a large project. What's a quick >and dirty way and also the classic way? The quick and dirty way is to make a cardboard cut out of your rocket's silhouette. The centre of gravity of the cardboard cutout is the centre of pressure of your rocket. Roughly speaking. The classic way is to use the Barrowman equation. SignatureDarren J Longhorn http://www.geocities.com/darrenlonghorn/ NSRG #005 http://www.northstarrocketry.org.uk/ UKRA #1094 L2 RSO http://www.ukra.org.uk/ >>You people have been such a good and quick resource. I need a good >>concept/formula to calculate a CP for a large project. What's a quick [quoted text clipped - 5 lines] > > The classic way is to use the Barrowman equation. The quick and dirty way is to use VCP or the like. THe classic way is to use a slide rule or maybe an HP scientific calculator. SignatureBob Kaplow NAR # 18L >>> To reply, there's no internet on Mars (yet)! <<< Kaplow Klips & Baffle: http://nira-rocketry.org/Document/MayJun00.pdf www.encompasserve.org/~kaplow_r/ www.nira-rocketry.org www.nar.org S&T is becoming this decades Steve Weaver! >>>You people have been such a good and quick resource. I need a good >>>concept/formula to calculate a CP for a large project. What's a quick [quoted text clipped - 7 lines] > >The quick and dirty way is to use VCP or the like. I'll race you if you like? ;) THe classic way is to use >a slide rule or maybe an HP scientific calculator. Before my time... SignatureDarren J Longhorn http://www.geocities.com/darrenlonghorn/ NSRG #005 http://www.northstarrocketry.org.uk/ UKRA #1094 L2 RSO http://www.ukra.org.uk/ >>>>You people have been such a good and quick resource. I need a good >>>>concept/formula to calculate a CP for a large project. What's a quick [quoted text clipped - 14 lines] > >Before my time... Why, back in my day, we had to use large stone cutouts of our models, and an abacus... <g> tah -- Tod A. Hilty Hilty Information Systems "Gentlemen, you can't fight in here. This is the war room." Do not look in the direction of the flash... Curl up in a ball as you hit the ground... CAUTION: The Mass of This Product Contains the Energy Equivalent of 85 Million Tons of TNT per Net Ounce of Weight Please replace weinerboy dot org with adelphia dot net for reply. >>>>>You people have been such a good and quick resource. I need a good >>>>>concept/formula to calculate a CP for a large project. What's a quick [quoted text clipped - 17 lines] >Why, back in my day, we had to use large stone cutouts of our models, >and an abacus... An abacus! You were lucky... SignatureDarren J Longhorn http://www.geocities.com/darrenlonghorn/ NSRG #005 http://www.northstarrocketry.org.uk/ UKRA #1094 L2 RSO http://www.ukra.org.uk/ >>THe classic way is to use >>>a slide rule or maybe an HP scientific calculator. [quoted text clipped - 3 lines] > Why, back in my day, we had to use large stone cutouts of our models, > and an abacus... Lucky. All we had were piles of pebbles. SignatureBob Kaplow NAR # 18L >>> To reply, there's no internet on Mars (yet)! <<< Kaplow Klips & Baffle: http://nira-rocketry.org/Document/MayJun00.pdf www.encompasserve.org/~kaplow_r/ www.nira-rocketry.org www.nar.org S&T is becoming this decades Steve Weaver! |
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