Space Fishing by Robert Winglee (NASA)

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    For the work of Robert Winglee, I probably follow from the time of Alma-mater. Interest has been since the publication of the Mini-Magnetospheric Plasma Propulsion (M2P2) . An interesting and enthusiastic (I would even say a very addicted) person (maybe a “humane”), who sometimes completely forgets his own basic knowledge gained at an institution of higher education.

    At one time, I even squeezed an article on this topic: MagBeam: plasma cheating .

    Nadys read about his new development (and new hobby) of the Europa Kinetic Ice Penetrator System for 2016, the Committee: Robert Winglee &
    Carl Knowlen
    and immediately remembered the article Cosmic Concept: Going Fishing on Other Planets .

    The news is already with a "smell", but maybe someone will be interested. Moreover, NASA has not yet canceled its financing . As Popmech writes :
    Due to the exorbitant cost, only a few missions, including lunar Apollo, were able to deliver samples of extraterrestrial material (soil) to Earth. One scientist wants to change this paradoxical situation, and proposes the idea of ​​a spacecraft with a variation of fishing rods, which can get soil material from a planet or an asteroid without actually landing.

    And who is this hero? Of course the inventor of MagBeam is Robert Winglee!

    Robert Winglee, chairman of the Department of Earth Science and Other Space Sciences at the University of Washington , says that missions — those that deliver soil materials from other astronomical bodies to Earth — give very little information about the structure of the Universe, because of their small number and, usually due to huge costs.

    The spacecraft must land on the surface of another planet (satellite, asteroid, comet), take a sample, take off and deliver it to Earth.

    “This does not mean that technology does not exist,” says Winglee. “This means that the cost of such an operation is quite high.”

    But Winglee and his students think that they have a system (technology) that can drastically reduce the cost of extracting a sample of alien soil by eliminating the stage of spacecraft landing from the mission. Like this. No more no less. I focus on the attention of the reader. A team of students, under the direction of Dr. Winglee, is conducting research on the development of a spacecraft, which could have flown past a planet or an asteroid, without actually landing, to shoot a surface penetrator tied to a spacecraft with a cable. The resulting material, the spacecraft will take back (will pull the probe for the cable) on board and return to Earth.

    At first glance, everything is cool and reasonable. Tests on the ground, shelled desert soil, log, ice and other improvised substances.

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    Whole groups and consortia are organized ( UCL DEPARTMENT OF SPACE & CLIMATE PHYSICS
    PLANETARY SCIENCE GROUP
    ) there is a project Europa Kinetic Ice Penetrator (EKIP) .

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    As soon as they did not torment the bullets, the soil, the ice, the glass and the students.

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    In general, the procedure is as follows:

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    Researchers conducted their tests initially at the sites with “soft ground”: the bottom of a dried-up lake in the Black Rock desert (Nevada) , and are about to prepare to go to “hard” in China Beachwhere they encounter difficult types of volcanic soils - very close in composition to those that can be encountered on asteroids.

    If their shells survive the impact there, it is expected that this technology can be launched within ten years.

    “I think we will either master it or break it,” said Winglee. “We would like to know how the speed of Mach 2 affects the state of a drill when it enters solid ground.”

    Consciously focus on the use of the term “Mach 2 speed”!
    «For We Would like to Demonstrate how to the make a The Mach 2 impact into the hard ground, which would be an amazing accomplishment as you might imagine.»

    I would like to talk about the use of Robert M. Winglee Mach number concepts for virtually no atmospheric Jupiter satellite ( Professor and Chair, Department of Earth and Space Sciences, University of Washington Seattle, WA 98195-1310, Director Washington NASA Space Grant Consortium) O2 and H2, the atmospheric pressure on the surface of Europe is approximately equal to 0.1 µPa (but not more than one micropascal), or 10 ^ –12 atm) and at a temperature not at all + 20 ° C).

    For reference:


    1. Pressure in the chamber installation for thermonuclear reactions up to 10 ^ -11 atm;
    2. The pressure of the atmosphere at an altitude of 120 km above the Earth is about 2.67 * 10 ^ -3 atm;


    Vacuum engineering space is far beyond the line of Karman .
    What are the Mach numbers and Reynolds?

    In the interview, he was broadcasting speeds of under 650 m / s. Anyway. The eternal story of "managers" and engineers, "holes" and holes. NASA allocated money (as with MagBeam). "Life is a success."

    Innovators tormented various construction materials: aluminum, composites, steel. Even IT was performed by some cool program for all “calculations”:
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    Note:
    Europa here has nothing to do with Europe, as part of Eurasia .
    Europe here is a satellite in the Jupiter system (the sixth satellite) - or Jupiter II.

    For acquaintance "futurology from RenTV" . No, you do not kick me for the fact that I do not rumble about the case, a sort of retrograde from "Roskosmos" ! Just my spent years studying and earning bread, generate the "Voice of one crying in the wilderness . "

    I will try to justify my whining:


    1. “Penetrator” is essentially an analogue of a construction dowel . Log in, he certainly will, in the ice of Europe all the more. But about the "get out" and "pull it with a cable" from the spacecraft, I'm afraid there will be significant problems. Yes, of course: pyrozapals can also be used (the main thing is that they do not work when the planetoid bark is broken through) to release a dynamic drill, however ... Vague doubts are tormenting me again .

    My experience of using dowel-pistols is outraged and yells: “nothing will come of it”. Namely: warp, pereklinit, temperature deformations again (when passing BOPS through armor (bronestal) flows (and BOPS flows the same).



    In general, the whole "idea" proposed by Winglee & Co., Looks utterly strange. Analog: "Rooting up a stump with the help of a car . "
    Only without support already.

    Apparently the professor does not read Geektimes and Philip Terekhov (@lozga in particular:
    How to rely on emptiness? ). What is there (at the University of Washington) with orbital speed and a reserve of Ек + Ер? I think so either the spacecraft will be attracted to Europe (Asteroid), or (if a miracle happens), Europe will be attracted to the spacecraft.

    2. “And what for goat bayan?”

    What do we know about Jupiter II (I cite Europe, since there is no point in talking about other asteroids)? A lot (since Copernicus already quite a lot).
    Orbital speed (v) = 49,476.1 km / h.
    Acceleration of gravity at the equator (g) = 1.315 m / s²
    Second cosmic speed (v2) = 2.026 km / s

    Moon for comparison . The second cosmic velocity for the Earth (v2) = 11.2 km / s. The spacecraft went to "separation" in the direction of Jupiter. Before Europe it is necessary to slow down (or rather, first equalize the speed and vector of the spacecraft with the orbital speed and the vector of Europe, and then slow down). The first cosmic speed (v1) for Europe = 1.68 km / s

    I’ll remind you of Voyager-2:

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    Ie V = 10-10.5 km / s, it is necessary to extinguish to 1.68 km / s, synchronize the orbital speed and rotation speed (13.73 km / s), reach the geo-orbit of Europe, shoot the drill-penetrator, drag it back (n. 1) and develop a second space to return to Earth.

    Reference: The second cosmic velocity (v2) for Europe = 2.026 km / s.

    I will not even consider that it is more profitable by weight:fuel supply for landing on Jupiter’s practically airless satellite and starting from it, or a penetrator + a solid propellant to accelerate it to “2Mach” + a cable + an electric motor to rewind (raise) + coil rotation stabilizers (dampers, stoppers, etc.) + engines of orientation and correction of the orbit + gyrodin + something else I forgot (WITHOUT IT, well, no matter: there will be a ricochet, the cable will break the orbital speed will drop) ... OR A RESERVE OF FUEL COMPONENTS for landing and taking off from a celestial body having g = 1,315 m / s².

    For me, the conclusion is obvious . Calmly sit down, drill (or pick with a scraper), place in a container, take off, give impetus to dial v2 and deliver the cargo to Earth.

    Everything is as usual - Luna-16.
    Mass of spacecraft: 5725 kg. Mass of the return missile: 512 kg. Mass of the saved device: 34 kg.
    The return missile is an independent missile unit with a single-chamber liquid jet engine of 1850 kg and a system of three spherical tanks with fuel components nitrogen tetroxide and asymmetric dimethyl hydrazine. The diameter of the central tank is 67 cm, the diameter of each of the peripheral tanks is 53 cm. The fuel supply system is displacement. To stabilize BP on the active site, steering nozzles with a total weight of 70 kg served.

    Only 512 kg ... and this is taking into account that the initially corrective-braking module (CT) was created for the delivery of a self-propelled vehicle to the surface of the Moon.

    Well, or option Appolon .
    Something that you like. The proportions change (it is understandable, the masses are different), but the principle is the same.

    3. If so much remote sensing: fired a rocket projectile, stirred up the junction of Jupiter’s satellite, took a dust cloud spectrogram, made a radioisotope analysis, with favorable circumstances, “sucked” some of the products of the release into the container (no atmosphere, gravity miser) and home.

    Everything. Report completed. Who did not fall asleep, thank you very much.

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