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Nasa will send helicopter to Mars to test otherworldly flight

bbc.com

61–70 of 128 posts

Re: Nasa will send helicopter to Mars to test otherworldly flight

#61
post #36

Earlier quoted context omitted.

"The helicopter uses counter-rotating coaxial rotors about 1.1 m in diameter..." Not to be little it but, in short, a drone. I presume the rocket scientists are jealous ;)

Of course. It's by definition until we get someone to Mars.

I hear ya. But at 1.1m lifting an adult human might be a struggle.

Re: Nasa will send helicopter to Mars to test otherworldly flight

#62

Earlier quoted context omitted.

"The helicopter uses counter-rotating coaxial rotors about 1.1 m in diameter..." Not to be little it but, in short, a drone. I presume the rocket scientists are jealous ;)

The funny thing is that you could almost classify most space missions as drones (or probes).

They are usually called rovers, unless they actually fly. I cannot name any single atmospheric flight on another planet, only controlled plunges.

Re: Nasa will send helicopter to Mars to test otherworldly flight

#63

Earlier quoted context omitted.

It isn't too hard to simulate low gravity, all you need to do is move a large aircraft in the appropriate parabolic pattern. My understanding is that this is already how NASA trains astronauts for zero-g environments, and how weightlessness is done in space movies. Adjusting the path to match Mars gravity should not be difficult.

True, but you cannot test a small helicopter inside an aircraft, can you?

I don't see why not, a test that goes 10 feet up, 50 feet over, 10 feet down should be sufficient. The thing in the video looks like it could fit in a large cargo plane. Or, are you concerned about turbulance due to being in a closed space vs open atmosphere?

Re: Nasa will send helicopter to Mars to test otherworldly flight

#65

Link to the underlying press release [0] which has slightly more info than the BBC article. There is a bit more background about the project at [1], with some key points being: "The helicopter uses counter-rotating coaxial rotors about 1.1 m in diameter. Its payload will be a high resolution downward-looking camera for navigation, landing, and science surveying of the terrain, and a communication system to relay data…

"The helicopter uses counter-rotating coaxial rotors about 1.1 m in diameter..." Not to be little it but, in short, a drone. I presume the rocket scientists are jealous ;)

I too found the terminology a bit weird. When I think "helicopter", i think "gigantic rotor blade with a cockpit fit for a human".

When i think "quadcopter", I think of something smaller than what NASA has proposed.

Re: Nasa will send helicopter to Mars to test otherworldly flight

#66

Earlier quoted context omitted.

The funny thing is that you could almost classify most space missions as drones (or probes).

They are usually called rovers, unless they actually fly. I cannot name any single atmospheric flight on another planet, only controlled plunges.

[deleted]

Re: Nasa will send helicopter to Mars to test otherworldly flight

#67

If this is the sort of experiment that is getting space on a rocket then I kind of wonder if NASA is out of ideas. In other news, Hepatitis C is making a big comeback here in Denver. It's the sort of disease we used to laugh about being a "third world" problem back in the day. We don't use the term "third world" anymore, but we are becoming one nonetheless. I can't stop thinking about what archaeologists will think a…

Are you a markov chain?

Yeah I get that the elite whites love NASA, so anyone daring to criticize them will be downvoted on here, but after maybe the 2000th spider web spun in microgravity maybe, just maybe, like we can start to improve human's lives now?

Re: Nasa will send helicopter to Mars to test otherworldly flight

#68

Link to the underlying press release [0] which has slightly more info than the BBC article. There is a bit more background about the project at [1], with some key points being: "The helicopter uses counter-rotating coaxial rotors about 1.1 m in diameter. Its payload will be a high resolution downward-looking camera for navigation, landing, and science surveying of the terrain, and a communication system to relay data…

"The helicopter uses counter-rotating coaxial rotors about 1.1 m in diameter..." Not to be little it but, in short, a drone. I presume the rocket scientists are jealous ;)

That's what I thought too. But they've been designing this for years; so it might have started before drones got as popular as they are.

I mean, drones are just a new name for hobby aircraft. People typically associate drones with quad-copters, but people were flying tiny helicopters next to their small replica remote aircraft for decades.

I realize the FAA has official designations for what is a drone (and a lot of older hobby aircrafts may now technically be drones), but it's a word that's really come about because the field is now more accessible/affordable.

Re: Nasa will send helicopter to Mars to test otherworldly flight

#69

Earlier quoted context omitted.

> GPS is already less accurate the further from equator you get, as all the visible satellites are increasingly on one side of you. Not contradicting you, but just to be clear: GPS satellites are not in geostationary orbits above the equator, or even in geosynchronous orbits. Rather, they are in medium-Earth orbits and their time-averaged density over the Earth is only a little lower over the poles as the equator. At…

Hmm, not sure I understand what you're saying. Figure 5 in that paper is the situation I'm describing: at a certain latitude (52 deg north in this case, incidentally that latitude is my 'hood) there are no satellites visible to the north. Figure 2(b) illustrates why that's bad for precision.

Sure, that's why I said I wasn't contradicting you, just clarifying. One could mistakenly read your comment and think that the coverage goes to zero at the poles ("the further from the equator you get"), but of course GPS still works pretty well there. When you get far enough north, satellites from the "other side" of the Earth come into view, so the accuracy levels off and (I think) starts increasing again with latitude.

(And I corrected my comment to refer to figure 4, not 2.)

Re: Nasa will send helicopter to Mars to test otherworldly flight

#70

Does anybody knows what is the autonomy of this helicopter ?

Considering the lag in communication to earth, it'd have to be fully autonomous. It needs to be able to avoid obstacles, navigate visually (that article states a compass won't work with Mars's magnetic field) and find a place to land, in direct sunlight, whenever it needs to charge its batteries.

I'm sure NASA has mapped out some waypoints, but there's no way to really control the actual flight remotely without a human in orbit.

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