The Ingenuity helicopter that has flown on Mars is designed for roughly 0.01 bar pressure and a colder atmosphere made of mostly CO2. See links (including video) in this answer to What JPL laboratory is this exactly, and what are the functions of these amazing-looking control panels? in Space SE ...
A Chinese Long March 4B rocket is expected to take a Haiyang oceanography satellite to… The post China to launch Haiyang-2D Oceanography Satellite from Jiuquan appeared first on NASASpaceFlight.com.
At Perseverance's and Ingenuity's location the atmospheric pressure is about 750 Pa (0.11 psi). On Earth, we find that pressure about 110,000 ft high. If we built a copy of Ingenuity, could we bring it up there or close to that altitude? Probably not, because of the Earth's higher gravity and its...
> The Ingenuity helicopter that has flown on Mars is designed for roughly 0.01 bar pressure
don't forget, and designed for Mars' gravity
In the first half of the video, it's not really flying, it's more like hopping up and then crashing back down. In the second half of the video, it is suspended from a cable that takes off 2/3rds of the weight in order to simulate Mars gravity. — Jörg W Mittagyesterday
I'm not sure what it is that I forgot exactly. They simulated reduced gravity with the cable simply to make the aerodynamic testing and qualification accurate.
Yes I know what you mean, there will very likely be a second copy or specimen (don't know exact word either) at JPL ready to go. When there are bugs or unexplained phenomenon, they often try to reproduce them in a lab on Earth whenever possible.
I think that the motor capabilities are a key part of the question. Can they get the right speed and right torque at the same tie with their current gearing.
What is this balloon for in this clean room and what is the proper name for the "stand" that is holding the satellite? shows the image below, and a comment below @OrganicMarble's answer there asks:
Is ISRO the only agency to use balloons, or others too use them?
which leads to the more general ...
Oh, I thought they were geared, You use the word "gear" four times in your answer which threw me off, but you do say "two brushless direct-drive propulsion motors" in your first sentence.
No I'm wrong; I'm merging tfb and ymb answers together because I'm doing three other things at the same time and didn't see where one ended and the next began.
I simply saw gears all over the place and panicked
But 1:1 could certainly be considered a "gearing ratio", and sometimes people will shorten that term to "gearing" even if there aren't any literal gears.
Anyway, it's time to get into gear myself and start the day's tasks. later!
From my related question comes this idea of electrically controlled blade pitch in helicopters.
Control linkages in helicopter rotors seem to be pretty complex. This surely incurs a lot of friction, especially if you realize that blades have to "flap" back and forth as they rotate around (in ord...
saw it, but not really, Ingenuity uses the motors to control the swash plate, which controls the rotor blades. That one when I skimmed it before wants a motor per rotor blade
to me, so many obvious problems with that, not least of which the mismatch that will happen
for some reason I saw it recently, thought it a new question, but wow it's from 2015
the answers already cover the plurality of problems :D
This is a story about trying to rethink complex systems: the challenges you face when you try to rebuild them, the burdens you face as they grow, and how inaction itself can cause it’s own problems. When you’re weighing the risk and reward of replacing architecture, it can take several attempts to find a solution that works for you.
The photos transmitted by the Viking 2 lander and those taken by the Chinese rover show quite different landscapes. They do not corroborate each other, also they should look similar, as long as they present the same Utopia Planitia. So, there exist no mutual independent confirmation of landings i...
funny thing is, if it's being faked, wouldn't they've matched the landscape :'D
In The Observatory @Donald.McLean linked to Scientists will peer at first galaxies with James Webb telescope which says in part:
Many of the proposed tasks for the Webb telescope were planned and approved in the 1990s as the observatory was under initial development, said Klaus Pontoppidan, an a...
In The Observatory @Donald.McLean linked to Scientists will peer at first galaxies with James Webb telescope which says in part:
The new telescope will augment science performed by Hubble, not necessarily replace it, (Nestor) Espinoza said. He is part of the James Webb team at the organization t...
@geoffc Starship payload to LEO is 100t. Its fuel mass is 1200t. Thus, to completely refill a starship on LEO, requires 12 tanker launches and not only 1.