Пікірлер

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  @gustavrsh10 күн бұрын

  Great video with the basics! Certification is important but it's a funny in a way to me, let me explain: I'm Brazilian, so rocket parts and motors aren't for sale here. There isn't a Tripoli prefecture, so I can't feasibly get a certification. But, I'm in a college rocket team, and we managed to design (everything, including the motor!), build, fly, and recover with no damage a rocket that went slightly below 10k ft last week on Spaceport America Cup. The event demanded everyone to be associated to Tripoli, for their insurance. Here's the funny part: everybody is a Level 0!

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  @GravitonMedia7 күн бұрын

  That's interesting. I didn't know Brazil had those regulations. My team was at Spaceport, too. Rice Eclipse Rocketry Team. I wasn't able to go myself, but maybe you met some of my friends there :)

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  @kareemsalessi17 күн бұрын

  11:20 140 meters per second speed in its first second. Compare that with:: "Saturn V Rocket Launch Speed and Height 2 " showing a whopping speed of 3 meters/second!!

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  @kareemsalessi11 күн бұрын

  (VULPES II ROCKET LAUNCH)

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  @Hobbes74610 күн бұрын

  We’ve been over this before. A TWR of 1.00000001 is enough for the rocket to get off the launch pad. The Saturn V had a TWR of about 1.25. You don’t want a huge acceleration: 140 m/s2 is 14 G, which would kill the humans on board. The acceleration increases as fuel is used up and the stage gets lighter, so the rocket has to be designed to keep the acceleration near the end of a stage’s run below the limit. For manned rockets, acceleration is limited to 3-5 G. At the start of the stage’s run, you then end up with a TWR of slightly over 1.

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  @kareemsalessi10 күн бұрын

  ​@@Hobbes746==Enistein::: I have proved my facts with empirical kitchen-table experiments which even certified retards can conduct, so, I suggest that you prove your fairytale-TWR by buying one of these O-motors, and putting it on a rocket heavy enough to make a TWR==1.25, or even 1.5, or even 2, then sit next to it at launch. If your rocket moves up, you'll survive, but if doesn't it explodes and turns you into charchoal, which would make a memorable artifact in a NASA museum !!! agree??? Based on my below comment exchanges, and assuming that you expect your O-motor to burn for 5 seconds, if you and 4 other NASA-fans like you stand on top of the motor, you'd make up the bulk of a 400 kg rocket, then fire up the motor, and expect to reach the moon in a nono-second!!! How' that for a solution Rocket-professor???

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  @kareemsalessi10 күн бұрын

  @@Hobbes746 ==Enistein::: I have proved my facts with empirical kitchen-table experiments which anyone can conduct, so, I suggest that you prove your fairytale-TWR by buying one of these O-motors, and putting it on a rocket heavy enough to make a TWR==1.25, or even 1.5, or even 2, then sit next to it at launch. If your rocket moves up, you'll survive, but if doesn't, don't worry about !!! agree??? Based on my below comment exchanges, and assuming that you expect your O-motor to burn for 5 seconds, if you and 4 other NASA-fans stand on top of the Omotor, you'd make up the bulk of a 400 kg rocket, then fire up the motor, and expect to reach the moon in a nono-second!!! Are you brave enough for that???

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  @kareemsalessi10 күн бұрын

  @@Hobbes746 Did you get my deleted reply???

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  @kareemsalessi17 күн бұрын

  17:00 O-motor delivers a Maximum of 40,000 Newtons==40 TONS of thrust force???

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  @GravitonMedia11 күн бұрын

  7:35 Ah, sorry. I see that's a mistake in the graphics there. It's 40,000 Newton-seconds, not 40,000 Newtons. Newton-seconds are a measure of total impulse, or change in momentum. This means that an O-motor can change the momentum of a rocket by 40,000 Newton-seconds. If delivered in one second, that would be an average thrust of 40,000 Newtons, but O-motors typically take five seconds to completely fire, for an average thrust of 8,000 Newtons.

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  @kareemsalessi11 күн бұрын

  ​@GravitonMedia thanks. So, 800 kilos of instant thrust, and how heavy was it at launch???

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  @kareemsalessi11 күн бұрын

  0:10 Over 3lb, Ok, let's say 4lb==2 kilos. So, then, TWR==800÷2==400. Compare that with a whopping TWR<1.5 of Apollos, SpaceX, etc.😅

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  @kareemsalessi11 күн бұрын

  (VULPES II ROCKET LAUNCH)

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  @GravitonMedia7 күн бұрын

  I didn't use an O motor. I used an H motor. A Cesaroni H255 to be specific. This video is both about my rocket and hobby rocketry in general, so I included the information about O motors to help teach people about the different kind of motors in hobby rocketry. The Cesaroni H255 motor has an average thrust of 255 Newtons.

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  @kareemsalessi17 күн бұрын

  8:30 A must on all Boeing planes!!!

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  @THEBILLIONAIRETRADINGCLUBTV23 күн бұрын

  Good content… well done and informative 😂 the phone call

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  @purple.4955Ай бұрын

  Congratulations!! I am currently on the design journey of an L1 attempt rocket too and this video inspired me to try harder even more!! P.S. what's the diameter of the airframe of Vulpes?

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  @GravitonMediaАй бұрын

  Thanks! The Vulpes had a diameter of four inches, which was definitely overkill for an L1 in retrospect. You can get cardboard tubes on Amazon that have diameters of 4in, 3in, or 2.5in. All of those work pretty well for L1s.

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  @quyenanhphamtran880Ай бұрын

  ;kjk;'ljlk

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  @rolandberger7493Ай бұрын

  lol

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  @adamrudin3392Ай бұрын

  Another excellent explanation.

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  @adamrudin3392Ай бұрын

  Your videos are really smart and really good.

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  @BigPatViggenАй бұрын

  The weird thing that the common name for Nitrogen in French, to this day, is « Azote ». Looks like they never came to a consensus!

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  @GravitonMediaАй бұрын

  Yup. Interestingly, Chaptal's name fell out of favor in his home country but remained dominant in the English-speaking world. Lavoisier was a very influential chemist who discovered and named a lot of elements, so it makes sense that the name stuck in France.

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  @zelmonekАй бұрын

  a-zot is the name of nitrogen in Poland and (i'm not sure) it the name in other slavic countries

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  @GravitonMediaАй бұрын

  Here's a great website, that summarizes the names for nitrogen in other languages. A lot of slavic languages do call it some variant of azote. elements.vanderkrogt.net/element.php?sym=N

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  @pineapples-cw1qtАй бұрын

  Underrated

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  @GravitonMediaАй бұрын

  Thank you :)

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  @AndreiAndrei-pg8eg2 ай бұрын

  This is like the most complicated way ive seen so far for building an orbital ring

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  @cedricjoshuapayne2 ай бұрын

  Check your audio. Less room space, more vocals.

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  @darshilkareliya2 ай бұрын

  The snail😅😂

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  @HuxleysShaggyDog3 ай бұрын

  How long would this take to build, and to winch? Do we have good estimates?

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  @Jaggerbush3 ай бұрын

  This is a good channel and good explanation - i think if the production was a bit better - better audio - this channel could be easily one of the top physics/space/math channels on YT.

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  @sweaterdog54753 ай бұрын

  Woah, you said THIS was your second Rocket? Congrats!

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  @grantjohnston71483 ай бұрын

  One particle or stream of energy Universe is literally the only explanation for spooky action at a distance !

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  @LT728843 ай бұрын

  loved it!! I did my L1 on an H550. It burns for 0.5 seconds and produces 550 newtons of thrust in that short burn time hahaha. My rocket held up great. For my L2, i used the same rocket with a J270 motor and single deploy. However, on the second launch, the motor exploded 2.25 seconds into flight. It separated my booster from the upper airframe, feel 5300 feet and was recovered without a scratch hahaha. Only a broken shock cord :) My L1 and L2 were done with no electronics, however, my L3 we had redundant dual deploy, but my team launched without me and forgot to hook the electronics up so it came in ballistic from 10,000 feet......

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  @GravitonMedia3 ай бұрын

  Wow! That sounds like an interesting flight record. I'm glad the L1 went well. Sorry about the L2. CATO's are rare with manufactured motors, but it's very frustrating when it happens. How did you keep your L2 from drifting too far with a single motor deploy? I've been working on an L2 design, but increasingly find a drogue necessary to prevent drift. An L3 sounds like a daunting challenge. Sorry it went ballistic. Good luck getting your L3 certification.

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  @LT728843 ай бұрын

  @@GravitonMedia thanks :) Pick the lowest L2 motor you can find. Thats how you prevent drift. Also add weight to the payload section in open rocket and sim it. I added a couple of bags of black beans to my rocket. Kept it low and slow and the extra weight helps it drift down rather than at an angle. Might land a tad harder, but my rocket was fine The j 270 is a lower end L2 motor, but i still had to walk half a mile to get it. Oh, and if its a slightly windy day, you will have to keep an eye on it. Take binoculars and a ATV if you have one. All in all, my L2 disnt drift very far since it was a low power3d motor and i had a couple bags of black beans in the payload section to add drag and weight.

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  @GravitonMedia3 ай бұрын

  Thanks for the advice!

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  @akashsingh2764 ай бұрын

  Could you share the sizes of the rocket and fins, please?

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  @GravitonMedia3 ай бұрын

  Sure. Here's a link to the OpenRocket file that has all the relevant dimensions: drive.google.com/file/d/1LGcFyVThF15gDpPeObEHJWtwBjVWKXXZ/view?usp=sharing

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  @josephkarpel245 ай бұрын

  Would pure beryl be worth more than emerald? Since you said emerald was an impure form of beryl i was just wondering.

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  @joshdonaldson28885 ай бұрын

  Ye-eh-eh-eh-yeah ye-eh-eh-eh-ye-eah

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  @toothlesszilla99825 ай бұрын

  The cutey vulpes cutey rocket 😊

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  @CristiNeagu5 ай бұрын

  Actually, it got its name because when someone inhales it, everyone present goes "he he he he..."

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  @opinionrat5 ай бұрын

  I don't get why this was so hard for him to prove. He just needed to bring a party balloon into the meeting and say "behold"!

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  @blubyboomer5 ай бұрын

  Wow I did not know that

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  @bingusbongus98076 ай бұрын

  how would we put stuff on the ring while keeping every force ballanced? wouldnt the weight of a mass driver through it off?

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  @absolutefolly20116 ай бұрын

  Maybe in 200 years. This megaproject would require cooperation and resources our species has yet to even comprehend. And would be far too vulnerable. Unlikely to ever happen. Fun to think about sure

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  @smileyface65835 ай бұрын

  No it won’t. It’s not even on the same scale, in terms of resources and costs, to the American Interstate Highway system, and this would be spanning multiple continents lol

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  @aaronskoy9576 ай бұрын

  Wow! such a cool idea. What about friction generated by the moving metalic mass? You need weight circulating to make it work but with weight, comes much friction and wear on the interior walls. Maybe some sort of superfluid medium as the mass may help. So cool!

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  @GravitonMedia6 ай бұрын

  A lot of this friction is reduced thanks to the maglev technology. The moving parts are separated from the stationary parts by a vacuum, which greatly reduces the friction.

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  @kestrelwings6 ай бұрын

  A chain is only as strong as its weakest link. It looks like this tethered ring is more than 10,000 kilometers long. If it breaks anywhere, it flies apart. It contains a rapidly moving mass. If anything goes wrong, this rapidly moving mass will cause issues or shoot into space.

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  @GravitonMedia6 ай бұрын

  Check out this paper from the Atlantis Project (linked above): www.project-atlantis.com/wp-content/uploads/2023/07/TetheredRingPaper.pdf Part 6 talks about Geopolitical Considerations, including measures that might be taken in the event of a disaster to prevent widespread damage on the ground. I didn't have time to cover it in my video, but it's some pretty interesting stuff.

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  @Frankenbum036 ай бұрын

  Ty! I need more of this type of content.

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  @GravitonMedia6 ай бұрын

  There's more to come :)

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  @billyoui6 ай бұрын

  Tethered rings are a genius work around to the problem of buying real-estate in geostationary orbit. Super cool video!

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  @GravitonMedia6 ай бұрын

  Yes! Thank you!

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  @RaindropsBleeding6 ай бұрын

  If you're going to use magnets to run the orbital accelerator you're going to have to shield it too or it's going to mess with other systems on the infrastructure.

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  @NormadYT6 ай бұрын

  Why not a nuclear super jet that carries a rocket to space :(

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  @NormadYT6 ай бұрын

  2:20 newtons laws of gravity work well but aren’t perfectly accurate. Would it be better to use einsteins theory of relativity for more accurate aproximations

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  @GravitonMedia6 ай бұрын

  That is correct, but the inaccuracies are small at non-relativistic speeds. The Apollo program calculated all of their trajectories using Newtonian gravity without issue. A Tethered Ring could do the same.

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  @LeviAEthan5126 ай бұрын

  5:07 dude did you just yada yada pumping a planet spanning vacuum

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  @mathis13766 ай бұрын

  Keep it up 👍

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  @GravitonMedia6 ай бұрын

  Thanks!

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  @marcinkrzeszowiec15386 ай бұрын

  very sci fi, but very unfeasible. the temperature expansion, weather, tectonic shift and numerous other geo and engineering phenomena makes this a total fairy tale.

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  @marcinkrzeszowiec15386 ай бұрын

  ​@@pewterhacker huh? do you have a STEM degree to uphold you sarcasm? The greatest country in the world, can't build a simple hi-speed railroad between Los Angeles and San Francisco (~400miles), are you are talking about a 15 000miles suspended in the air, balanced by inertia and gravity, filled with super fast spinning heavy liquid tube? Are you mad? Or are you not paying your taxes yet? Cause nobody sane will even attempt to build such a thing with his own money. And I doubt sane people will want their taxes to be wasted even looking into the feasability of this. Look into Musk's hyperloop, if you wanna see, how ridiculously crazy this sounds. (and yes, the hyper loop was canceled due to heat expansion, sealing difficulties, the danger of rapid decompression and excessive maintenance and build costs). So...without any sarcasm, pls, don't straw man and belittle a valid argument. The hyper loop was canceled exactly due to the reasons I mentioned (and some others also). Neither you, nor you children will ever see a magic floating ring with spinning liquid inside of it. It's just stupid. It's a cool classical mechanics example of force balancing...But it's stupid in it's simplification of the reality we live in

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  @dovahnok09576 ай бұрын

  ​@@pewterhackerA normal building doesn't need to worry about the shifting of the tectonic plates, but a ring that size would be impacted, as being even a meter off would render the entire design useless. Projects that large are going to continue to be impossible for us for many more years. That's not even touching on basics like: how do you pull a vacuum that large and stable? How do you keep that stream of mystery matter spinning? Where does the energy come from to do this? Where do we get that much of any material? Where does the money come from?

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  @AliceB06 ай бұрын

  ​@@dovahnok0957it's a floating ring on strings You can just adjust the tension/attachment point of the strings

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  @pewterhacker6 ай бұрын

  @dovahnok0957 I don't think you understand the architecture. The ring is 32 km above the tectonic plates which, in any event, move so slowly as to be a non-issue.

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  @MrRolnicek6 ай бұрын

  @@dovahnok0957 To actually answer your questions: The "permanent" anchors aren't quite as permanent as this video makes them out to be, they would all have actuators capable of increasing or decreasing the pull on the cable to balance any unwanted movement (a small portion of which would probably be tectonic in nature) How you pull a vacuum for that moving mass in the middle, well my preferred solution is a turbomolecular pump, this is essentially impellers moving so fast that they disallow the movement of molecules in one direction altogether. Normally these are quite expensive but actually in the case of a tethered ring we already very conveniently have a very fast moving mass that can act as an impeller of a turbomolecular pump and it's high cost due to friction requirements are mitigated by the magnetic bearing solution. Accelerating the ring is not a trivial matter but it is very much within our current capability. There are already magnets holding onto the rotating ribbon to keep it from flying apart afterall so using them to accelerate the rotation isn't much of a stretch. It is also assumed that solar panels will hang from the ring since they are in prime real estate above any weather making them very reliable and easier to manufacture because no hard protective glass is needed. The project also assumes the energy of the rotating mass in the ring is used as energy storage to supplement the intermittent sources because there really is a LOT of energy there. On the question of the materials needed and their cost I will simply point you to the project atlantis website where you will find an interactive tethered ring simulation for which you can set a great many parameters including the material used and its parameters and cost which will be calculated for you based on the parameters of the ring you set up. Their default uses copper for the electromagnets and carbon fiber for the tethers and the cost is surprisingly bearable even without assuming cost reduction due to high bulk production of the tether.

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  @isaacarthurSFIA6 ай бұрын

  Nicely done!

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  @AllYourMemeAreBelongToUs6 ай бұрын

  Woah. Crazy seeing you here. Didn’t expect such a small channel to be on your radar.

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  @GravitonMedia6 ай бұрын

  Thanks, Isaac! I'm a big fan of your videos, too.

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  @pewterhacker6 ай бұрын

  Wow, this concept was explained really well. It feels like you made my head explode!

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  @GravitonMedia6 ай бұрын

  Thanks! I'm glad you liked it.

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  @AndriiNikolaiev6 ай бұрын

  На Луне людей еще не было. Всё что показали в телевизоре это враньё и голивудские сказки.

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  @carlenilsonaraujo79196 ай бұрын

  Como divide o centro de massa pro foguete não girar na ignição?

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  @hanakatanoboru68496 ай бұрын

  💯👌こういうのは、大事だね！これからは、ロケットです！！。フレーフレー阿修羅！！頑張れ、頑張れフレイアーの類！！それでよか！！。

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  @hanakatanoboru68496 ай бұрын

  ＹMCAの思い出をワンスモア！！OK。

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  @DinoCism8 ай бұрын

  Maybe we can make a ring out of all the orbital garbage SpaceX is cocooning the Earth in lol

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  @user-jq2qe4fb6i8 ай бұрын

  Since I was young, I have hoped to build a rocket that would reach space and take pictures of the Earth.

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  @jungeunkim22218 ай бұрын

  now I have to download this game againnnn Congrats for 2^11 subscribers🎉🎉

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  @GravitonMedia8 ай бұрын

  Thank you!

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  @karlthatplaysgames69418 ай бұрын

  well even tho im 14 and cant make a rocket like this I STILL THINK MY FALCON GOOFY 1000 IS GOOD ITS A WATER ROCKET >:(

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  @markusoz16608 ай бұрын

  Great video, it's amazing!!!

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  @GravitonMedia8 ай бұрын

  Thanks!