DD_bwest Posted February 28, 2017 Share Posted February 28, 2017 5 minutes ago, munlander1 said: I know an easy way to do it for a model rocket. well its more or less a macgyver rocket rather than a model rocket lol Quote Link to comment Share on other sites More sharing options...
munlander1 Posted February 28, 2017 Share Posted February 28, 2017 (edited) 1 minute ago, DD_bwest said: well its more or less a macgyver rocket rather than a model rocket lol Well cut out some foam board, thin wood, or cardboard, then find the balance. That's the center of pressure. I don't know how or why it works but it does. Edited February 28, 2017 by munlander1 Quote Link to comment Share on other sites More sharing options...
DD_bwest Posted February 28, 2017 Share Posted February 28, 2017 Just now, munlander1 said: Well cut out some foam board, thin wood, or cardboard, then find the balance. That's the center of pressure. I don't know how or why it works but it does. hmm okay ill try that. should i have the 4 fins straight up n down/side to side. or should they be angled. as itll effect the length of them in the cut out Quote Link to comment Share on other sites More sharing options...
munlander1 Posted February 28, 2017 Share Posted February 28, 2017 Just now, DD_bwest said: hmm okay ill try that. should i have the 4 fins straight up n down/side to side. or should they be angled. as itll effect the length of them in the cut out Quote Link to comment Share on other sites More sharing options...
DD_bwest Posted February 28, 2017 Share Posted February 28, 2017 5 minutes ago, munlander1 said: thanx that looks like full length. now i just need a 4 foot cardboard sheet lol Quote Link to comment Share on other sites More sharing options...
munlander1 Posted February 28, 2017 Share Posted February 28, 2017 5 minutes ago, DD_bwest said: thanx that looks like full length. now i just need a 4 foot cardboard sheet lol No problem. I think you could scale it down if you really wanted too. Quote Link to comment Share on other sites More sharing options...
DD_bwest Posted February 28, 2017 Share Posted February 28, 2017 Just now, munlander1 said: No problem. I think you could scale it down if you really wanted too. I could try that to, i wanna do alot of testing before i launch the real thing. doing a half sized would probably be easier on a ksp note, im gonna take the logos you can put on rockets in game and make stickers i can put in my rockets lol Quote Link to comment Share on other sites More sharing options...
AnonymousAerospace Posted March 3, 2017 Share Posted March 3, 2017 anyone know the music in this video ?https://www.youtube.com/watch?v=2QGI7S9jtg0&t=1s Ps sorry if this isnt the right place for this Quote Link to comment Share on other sites More sharing options...
StupidAndy Posted March 3, 2017 Share Posted March 3, 2017 that sounds like lounge talk, this is for SCIEEEEEEENCE!!!! how will the SpaceX Falcon Heavy land both of the stages at the same time? will it be computerized or will it be manned, another question, is it manned already? Quote Link to comment Share on other sites More sharing options...
munlander1 Posted March 3, 2017 Share Posted March 3, 2017 14 minutes ago, StupidAndy said: SCIEEEEEEENCE Science rules I think both will be computerized like previous landings. Quote Link to comment Share on other sites More sharing options...
peadar1987 Posted March 3, 2017 Share Posted March 3, 2017 2 hours ago, AnonymousAerospace said: anyone know the music in this video ?https://www.youtube.com/watch?v=2QGI7S9jtg0&t=1s Ps sorry if this isnt the right place for this Darude Sandstorm Quote Link to comment Share on other sites More sharing options...
WinkAllKerb'' Posted March 4, 2017 Share Posted March 4, 2017 (edited) what if a celestial bodies external land/limit/"peripheral density concentration" velocity rotation speed on itself around it's axis happen to be faster than celerity for whatever reason this could/may/already happen(ed) ? just poking around because something that is already rotating fast could eventually become faster and faster @ it's periphery if it get bigger and bigger // "radius + matter in rotation density" at some point , whatever the reason this happen (and far superior to the critical velocity as described in the linked book) ... from an abstract theorical point of view i mean edit: https://books.google.fr/books?id=akDVteYDC1kC&pg=PA79&redir_esc=y#v=onepage&q&f=false somehow i don't like much how this paragraph start: "It has long been recognized that ..." that what that the earth is flat ? and then what ? it exclude what ever random event or exception to the the most commonly shared set of rules ? it's even like writing this: "it has long been recognized ... (( but still still something sound wrong about that somewhere as an ommissive way of subconcsious form of writing )) Edited March 4, 2017 by WinkAllKerb'' UTF-8#q=rotation+period+and+other+data+correlation+repartition&* ... hum ... hum Quote Link to comment Share on other sites More sharing options...
Nibb31 Posted March 4, 2017 Share Posted March 4, 2017 22 hours ago, StupidAndy said: that sounds like lounge talk, this is for SCIEEEEEEENCE!!!! how will the SpaceX Falcon Heavy land both of the stages at the same time? The same way Falcon 9 lands. It is all automatic. 22 hours ago, StupidAndy said: will it be computerized or will it be manned, another question, is it manned already? Rockets are always flown by computers on a predetermined trajectory, even when they are manned. It makes no sense to introduce human error. Falcon is just a launcher. Dragon is the spacecraft. Dragon 1 is un unmanned cargo vehicle. Dragon 2 will be the manned version, but it hasn't flown yet. Quote Link to comment Share on other sites More sharing options...
StupidAndy Posted March 4, 2017 Share Posted March 4, 2017 (edited) oh okay, thanks everybody! it does make sense, but one last question due to the first falcon 9 being the first rocket to land upright without parachutes, were the first landings manned? as in controlled by humans? Edited March 4, 2017 by StupidAndy Quote Link to comment Share on other sites More sharing options...
JayPee Posted March 4, 2017 Share Posted March 4, 2017 22 hours ago, peadar1987 said: Darude Sandstorm you know, I almost posted this... then decided against it... but maybe i should have. Quote Link to comment Share on other sites More sharing options...
SuperFastJellyfish Posted March 4, 2017 Share Posted March 4, 2017 30 minutes ago, StupidAndy said: oh okay, thanks everybody! it does make sense, but one last question due to the first falcon 9 being the first rocket to land upright without parachutes, were the first landings manned? as in controlled by humans? No, they are autonomous using sensors and computer algorithms. Unless, you want to count the computer code that was written by humans as making it human controlled. Also, Falcon 9 was not the first rocket to land upright without parachutes. Here's one example called the Delta Clipper from the 1990s: Quote Link to comment Share on other sites More sharing options...
StupidAndy Posted March 4, 2017 Share Posted March 4, 2017 I really should search this stuff up Quote Link to comment Share on other sites More sharing options...
SuperFastJellyfish Posted March 5, 2017 Share Posted March 5, 2017 5 hours ago, StupidAndy said: I really should search this stuff up Heh no worries. That's why this forum is here. Quote Link to comment Share on other sites More sharing options...
munlander1 Posted March 9, 2017 Share Posted March 9, 2017 I was playing with an electromagnet and it was vibrating. Why was that? Quote Link to comment Share on other sites More sharing options...
0111narwhalz Posted March 9, 2017 Share Posted March 9, 2017 With what kind of current were you supplying it? If it was AC, then it was vibrating because the current (and therefore the magnetic field) is alternating in its direction. If it was DC... I 'unno. Quote Link to comment Share on other sites More sharing options...
munlander1 Posted March 9, 2017 Share Posted March 9, 2017 It was dc. Quote Link to comment Share on other sites More sharing options...
monophonic Posted March 9, 2017 Share Posted March 9, 2017 What kind of power source did you use? Battery, cheap ac adapter or maybe some lab equipment? Quote Link to comment Share on other sites More sharing options...
munlander1 Posted March 9, 2017 Share Posted March 9, 2017 20 minutes ago, monophonic said: What kind of power source did you use? Battery, cheap ac adapter or maybe some lab equipment? I don't know if it was lab grade, but it was not cheap. I forget the name of it though. Quote Link to comment Share on other sites More sharing options...
monophonic Posted March 9, 2017 Share Posted March 9, 2017 37 minutes ago, munlander1 said: I don't know if it was lab grade, but it was not cheap. I forget the name of it though. Ok, so hopefully its output is reasonably clean. Cheap adapters often produce "dirty" dc, that is the voltage doesn't switch sign but it still varies significantly at noticeable frequencies. That can also produce a vibrating sensation in an electromagnet, especially near magnetic materials. If you want to check your adapter for this you'll need an oscilloscope. Quote Link to comment Share on other sites More sharing options...
0111narwhalz Posted March 10, 2017 Share Posted March 10, 2017 (edited) What chemical system has the highest specific energy? Does it also rank highly on energy density? What is its specific energy, and how quickly does it release this energy? Edited March 10, 2017 by 0111narwhalz Quote Link to comment Share on other sites More sharing options...
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