| ▲ | Flying Around the World in under 80 Days(pinchito.es) |
| 65 points by alexfernandez 4 days ago | 22 comments |
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| ▲ | bigiain 2 days ago | parent | next [-] |
| Speaking of Jules Vern and Round The World. A new sailing record was set recently, which didn't _quite_ beat 40 days - it took them 40 days and almost 11 hours. If you've ever seen a SailGP boat flying up out of the water on their hydrofoils and doing 100kmh - imagine a 32m long 26m wide ocean going trimaran doing the same thing in a non stop circumnavigation of the globe. I think they _averaged_ 27knots or 50kmh! https://youtu.be/ffqhFyaCUFA If you _haven't_ seen the SailGP boats and are curious, here's somewhere to start: https://youtu.be/BQWOoP-Iwn8 |
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| ▲ | lukeinator42 2 days ago | parent | prev | next [-] |
| This is an interesting article from a couple of days ago about tracking diy balloons long distance: https://spectrum.ieee.org/explore-stratosphere-diy-pico-ball.... Given the tracker can be built for $14 it might be worth it to test a version with just the custom hydrogen enclosure and tracker and see how far it gets. |
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| ▲ | moss_dog 2 days ago | parent | prev | next [-] |
| Delightful read, thanks for sharing. The website design is very pleasant, too! Also FYI the link to "Aves Æternæ" is broken. |
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| ▲ | rgmerk a day ago | parent | prev | next [-] |
| Hmmm. If, rather than flying close to sea level, you flew at high altitude (above commercial airliners), and kept it relatively small, I suspect that you could do this and no one would notice unless you told them. Though at high altitudes the winds are such that it would be less of an airship and more of a steerable balloon. |
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| ▲ | alexfernandez 4 days ago | parent | prev | next [-] |
| Project to Circumnavigate using an Autonomous Airship Drone |
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| ▲ | bryanrasmussen 3 days ago | parent [-] | | PTCUAAAD. As acronyms go: too Lovecraftian I fear. PCAAD: Too Microsoftie. | | |
| ▲ | awesome_dude 3 days ago | parent [-] | | PiCArD? - Piloted Intelligent Circumnavigation Airship for Research and Development - Prototype Integrated Control Autonomous Route Drone - Programmable Intelligent Circumnavigation Aeronautical Remote Device - Piloted Intelligent Craft: Autonomous Route, Data-driven - Primary Intelligence Control And Route Determination - Precision Integrated Circumnavigation And Remote Deployment | | |
| ▲ | alexfernandez 2 days ago | parent [-] | | I'm loving "Project for Intelligent Circumnavigation Airship Research Drone" myself. |
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| ▲ | Trufa 2 days ago | parent | prev | next [-] |
| Can someone give me some notes on the legality of this? |
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| ▲ | simonebrunozzi 2 days ago | parent [-] | | Perhaps next time read the whole article? > Finally, can it be flown legally? Most of the trajectory can pass over the oceans, but skipping land completely would take too much of a detour, and likely be incompatible with prevailing winds. Although the political climate may be hostile, it is still legal to fly civil craft over other countries. | | |
| ▲ | poulpy123 a day ago | parent | next [-] | | It's legal to fly a civil craft over other countries but it doesn't mean there are no rules. The article touches the subject a bit at the end but doesn't go very much into details so I guess it's either a thought experiment or a planned in a future far enough that it is not relevant yet | |
| ▲ | Trufa a day ago | parent | prev | next [-] | | Perhaps next time be nicer. I mean, I imagine this being a mess, each country having it's own rules - maybe it's legal but regulated - does size matter? - does it matter when you cross a border? - do you have to announce? - does it matter how high you fly it? - are the International norms? - are there regulatory bodies? | |
| ▲ | fh973 a day ago | parent | prev [-] | | Sorry, but that's just ignorance. It's an UAV, it's not registered, has no type certificate. He doesn't even seem to be aware of airspaces. So no, it's not legal in many ways. | | |
| ▲ | alexfernandez a day ago | parent | next [-] | | Fair points. I am aware that it is a UAV, and that there are some harsh regulations around the world (e.g. drones are completely banned in Morocco). I am also willing to accept my vast ignorance. I don't know exactly what regulations apply to an autonomous airship: balloon, UAV, recreational amateur aircraft? Actual laws for the handful of countries involved in the actual trajectory (Nicaragua, Thailand, Egypt perhaps) are not easy to find online. So I changed the first paragraph to: "Finally, what are the legal implications of flying an airship drone over foreign air spaces? This very complex area clearly requires in-depth study and careful consideration, and it lies completely out of my depth. The primary objective is just to avoid being shot down since I'm not planning to visit any foreign countries in person, so allow me to just touch over the main issues." | |
| ▲ | dhsysusbsjsi a day ago | parent | prev [-] | | Ha! It’s also going to be funny when he discovers going over India requires parallel diplomatic clearance by his embassy and if he misses the slot, bye bye record. Repeat problem for multiple countries along the route. |
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| ▲ | cyberax 2 days ago | parent | prev [-] |
| Hydrogen containment: you might want to look at topping up hydrogen along the way. Have a small compartment inside the gas bag with lithium shavings and a small servo that can release water into this compartment. You'll get about 1/15-th of the lithium+water mass as hydrogen. So if you want to replenish 1 m^3 of hydrogen at STP (or around 1/8-th of the gas bag volume), you'll need around 600 grams of reagents. |
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| ▲ | cyberax 20 hours ago | parent [-] | | It actually doesn't even have to be a servo. Just have a water container that slowly releases water through a capillary tube/wick into the gas bag, "moisturizing" the gas inside. Lithium will then scavenge all the moisture from the gas inside the bag, releasing hydrogen in the process. |
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