วีดีโอ

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.

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.

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

Thank you :)

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.

@@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.

Thanks for the advice!

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

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

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.

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.

There's more to come :)

Yes! Thank you!

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.

Thanks!

​@@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

​@@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?

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

@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.

@@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.

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

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

Thanks! I'm glad you liked it.

ＹMCAの思い出をワンスモア！！OK。

Thank you!

Thanks!

Awesome! Nice work. Rice Eclipse is building a rocket for Spaceport America this summer. It'll be much larger than the rocket in this video and fly to an altitude of 30k feet. We've built our own hybrid motor for it and are very excited to see it fly.

Can eagestion system damage the parachute??

Yes, the ejection is a black powder explosion, so if the parachute isn't properly protected, it can be damaged

Anyone please help me to build my own rocket please 🙏🙏

Thanks!

For L1 rockets, the best way to do that is to simulate your rocket on the program OpenRocket. This will give you predicted values for apogee and time of flight, which you can use to determine the optimal delay time (just after apogee is best).