Hackaday links may 13, 2018 hackaday gastroenterologia o que trata

The dumbest thing this week is Uber’s flying car concept of the future. The braintrust at Uber envisions a world of skyports, on rooftops or on the ground that will handle 200 takeoffs and landings per hour. That is 4800 per day at a maximum. The record for the number of total takeoffs and landings for any airport was set last year at Mumbai’s Chhatrapati Shivaji airport with 969 takeoffs and landings in a twenty-four hour period. Yes, Uber wants to put the world’s busiest airport in a parking lot or something. Just wait, it gets dumber. Uber’s ‘flying car’ looks like a standard quadcopter, but with stacked, non-contrarotating props, for safety. These aircraft will be powered electrically, although it’s not quite clear if this is a hybrid setup (which could actually be practical now, but without regulatory precedent) or something built around an enormous battery (impractical for anything bigger than a 152 in this decade).

This aircraft is just a render, and Uber expects it to be certified for commercial flight in two to five years. This is nearly impossible. Uber plans to fly these aircraft autonomously. This will never happen. Additionally, Uber will not manufacture or design the aircraft. Instead, they will partner with a company that has experience in aerospace — Bell or Embraer, for instance — making the render a moot point, because ultimately Uber is just going to go with whatever Bell or Embraer have on the drawing board. Uber’s entire business plan is “move fast and break laws”, which will not serve them well with the FAA. The mere mention of Uber’s self-flying car has lowered the level of public discourse and has made us all dumber.

Here’s a great example of how cheap TVs are getting. [tmv22] built a 55 inch, 4k digital photo frame for $400. The TV was one Walmart was blowing out for two hundred and sixty dollars. Add in an Odroid C2 and some various cables and hardware, and you have an absurd digital photo frame for a few benjamins.

Espressif is getting investment from Intel’s venture capital division. Espressif, is, of course, the company behind the incredibly popular ESP8266 and ESP32 chipsets designed for the Internet of Things. Before the ESP8266 module popped up for sale on SeeedStudios, no one had heard of Espressif. Intel, on the other hand, is the largest semiconductor company on the planet and recently exited the maker IoT space because of the complete and utter failure of the Curie, Joule, Edison, and Galileo product lines. I would bet a significant portion of Intel’s failure was due to their inability to release datasheets.

Awesome news for synth heads. Behringer is cloning just about every classic synth and drum machine. At Superbooth 2018, Behringer, manufacturers of the worst mixers on the planet, revealed their clone of the Roland SH-101 synthesizer. It’s called the MS-101, and yes, it has the keytar grip. Also announced is a clone of the TR-808, Odyssey One, the OB-Xa, Arp 2600, and M100 modules. Here’s some context for you: a good Detroit techno show consists of an SH-101, TB-303, TR-808 and TR-909, all made by Roland in the 80s. These vintage synths and drum machines, at current prices, would cost about $10,000, used. The prices for these clone synths haven’t been announced, but we’re looking at a Detroit techno show for $1000. That’s nuts. Here’s a video of the 808. Posted in Hackaday Columns, Hackaday links Tagged behringer, espressif, flying car, synthesizer, uber Post navigation

1. No autorotation capability because of the fixed pitch, low inertia rotors inherent in such multirotors. This means any failure of the power supply, communication bus, control system, etc. means you’re dying in the next 30 seconds. Some of these can be solved with proper engineering, like local, completely independent redundant systems.

2. Mechanical failure of the top rotor means the debris will pass through the bottom rotor, destroying it, thereby taking away yaw control and either pitch or roll control. Good luck landing that. This could be solved using contra-rotating propellors, which would give the system enough redundancy to survive failure of one set of rotors, assuming the two opposing sets remaining can provide sufficient lift while the third set is mainly used to maintain control. Alternatively, 6 separate propellors could be used, to be able to survive a single failure. A double failure of two adjacent propellors would probably will kill you.

4. Uber wants to transport people within cities, which means the “skyports” will need to be near densely occupied areas, completely ignoring the fact that multi-rotor craft are noisy beyond compare, because of the very high speed propellors and their proximity to each other. A regular helicopter will be silent compared to such screening monsters. Most cities already prohibit low-flying helicopters because of the noise and safety concerns, with obvious exemptions for law enforcement and emergency medical teams. Take-off and landing is never going to happen.

Okay, so are you saying NASA was stupid to propose it? Because NASA doesn’t deploy transit services or really anything that directly provides services to consumers (other than intangibles, like scientific data, photos, videos, and analysis). NASA develops concepts, sometimes even prototypes, and then hopes industry steps forward to develop it to actual consumers. WHICH IS EXACTLY WHAT UBER IS DOING. And Uber is hiring those people from NASA to do it, as well as partnering with NASA to solve all the necessary problems.

All the drawbacks you listed are things we already deal with on surface streets, but with the added complication of having to navigate in just 2D, dodge pedestrians and all manner of things attached to the ground. We have all manner of death and mayhem on commutes today because of this and because we have like hundreds of millions of amateur drivers driving at high speed near each other, versus in the air with professional pilots (you did read about Uber’s proposal, right?) given an entire extra dimension for deconfliction.

Of course there are challenges in deploying such a system. However, I just can’t believe we might actually get flying cars, but the feedback on nerdy websites is so grotesquely jaded and negative. What is wrong with us?? Where did we go astray?