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#251 2020-11-28 14:06:13

GW Johnson
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From: McGregor, Texas USA
Registered: 2011-12-04
Posts: 4,951
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Re: Un- conventional ways to LEO

Edit: Content of post moved here, per request from SpaceNut.


GW Johnson
McGregor,  Texas

"There is nothing as expensive as a dead crew,  especially one dead from a bad management decision"

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#252 2020-11-28 19:52:19

kbd512
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Registered: 2015-01-02
Posts: 6,205

Re: Un- conventional ways to LEO

Edit: Content of post moved here, per request from SpaceNut.

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#253 2020-11-28 20:06:53

kbd512
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Registered: 2015-01-02
Posts: 6,205

Re: Un- conventional ways to LEO

SpaceNut,

Topic cleanup has been completed.  If you want, I can remove the prior posts in their entirety since all content has been "copy-pasted" into the topic created for micro capsules and micro space planes.

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#254 2020-12-02 08:21:11

tahanson43206
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Registered: 2018-04-27
Posts: 11,960

Re: Un- conventional ways to LEO

The Yahoo News Feed delivered an interesting (to me at least) item this morning ...

Gary Hudson is a name familiar to those who've been following developments in "New Space" .... I was surprised to see his name associated with the venture described in the article at the link below.

The sled described is NOT magnetic (apparently).  Instead the plan is to use a traditional rocket to accelerate the sled.

On the plus side (as I think about it), a rocket sled could be converted to a magnetic one if the business plan proves viable.

https://www.yahoo.com/finance/news/radi … 11024.html

Alan Boyle
Tue, December 1, 2020 9:11 PM ET

A patent drawing shows Radian Aerospace’s concept for a space plane on a sled. (Radian via USPTO)
For years, Renton, Wash.-based Radian Aerospace has been working on a rocket project while holding its cards close to the vest. Now several of the big puzzle pieces have been put together to reveal what Radian’s executives and backers have in mind: a rail-launched space plane that could carry passengers to orbit and back.

<snip>

Radian also is seeking a patent for a concept that calls for launching a winged single-stage-to-orbit craft with an initial boost from a rocket-powered sled on rails. One diagram that’s included in the application shows the plane docking with a space station, shuttle-style. At the end of each mission, the plane would make a horizontal, airplane-style landing on a runway.

<snip>

The inventors listed in the application include Livingston Holder, who was part of Air Force’s Manned Spaceflight Engineer program in the 1980s and went on to become a Boeing program manager.

After spending more than a decade at Boeing, he became vice president for space systems at Seattle-based Andrews Space in 2002, and then co-founded a Renton-based consulting firm called Holder Aerospace in 2004.

Two of the other inventors, Gary Hudson and Bevin McKinney, are veterans of Rotary Rocket, a space venture that tested a rotor-equipped prototype launch vehicle in 1999 but fizzled out a couple of years later.

(th)

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#255 2020-12-02 17:55:53

SpaceNut
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From: New Hampshire
Registered: 2004-07-22
Posts: 26,733

Re: Un- conventional ways to LEO

That's the em rail launch from the carriers that we talked about where the motor portion was a flat inductive design to move the sled.

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#256 2020-12-03 18:34:29

tahanson43206
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Registered: 2018-04-27
Posts: 11,960

Re: Un- conventional ways to LEO

The article at the link below describes an X-37b-like system that can deliver small satellites to orbit on short notice and land on any runway that is a mile long, which means many if not most.

I chose this topic for the post, because it is an "unconventional" business plan, and it already has paying customers.

None of the actual technologies or procedures are new. 

It's the packaging that I think helps this system to stand out!

Ravn X's delivery system is designed for rapid response delivery, and is able to get small satellites to orbit in as little as 180 minutes -- with the capability of having it ready to fly and deliver another again fairly shortly after that. It uses traditional jet fuel, the same kind used on commercial airliners, and it can take off and land in "virtually any weather," according to Skylus. It also takes off and lands on any one-mile stretch of traditional aircraft runway, meaning it can theoretically use just about any active airport in the world as a launch and landing site.

One of they key defining differences of Aevum relative to other space launch startups is that what they're presenting isn't theoretical, or in development -- the Ravn X already has paying customers, including over $1 billion in U.S. government contracts. Its first mission is with the U.S. Space Force, the ASLON-45 small satellite launch mission (set for late 2021), and it also has a contract for 20 missions spanning nine years with the U.S. Air Force Space and Missile Systems Center. Deliveries of Aevum's production launch vehicles to its customers have already begun, in fact, Skylus says.

https://www.yahoo.com/finance/news/spac … 36117.html

This system comes pretty close to the system kbd512's been thinking about, in another topic (or quite possibly this one).

The current payloads planned are small satellites, but in time a suitably packaged human could be delivered to orbit using this system.

(th)

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#257 2021-12-10 09:00:43

Terraformer
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From: Ceres
Registered: 2007-08-27
Posts: 3,560
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Re: Un- conventional ways to LEO

An airship mounted stratospheric light gas gun, powered by hydrogen and oxygen.

If it accelerates projectiles to 4km/s over 10km, it would subject them to 80g of acceleration. Not for fragile cargo, but water, plastic, metal etc could survive. it. Can we build solid rocket motors that would work under such accelerations, to provide the extra 4km/s to reach orbit?

If we could use hydrogen instead, and heat it externally (maybe even solar thermal?), it could send cargoes out at orbital velocity, needing only a small rocket for orbital insertion. Have them collected by a spacecraft from an unstable low orbit. The cost per kg could get very low, especially if we're using solar power (no clouds up there to cause intermittency). Almost all of the mass we need to get up there can tolerate very high accelerations, if we build furniture on orbit. Even if launching fragile things like electronics and humans cost $2000/kg, $10/kg bulk materials would make exploration really cheap compared to what it is now.


"I'm gonna die surrounded by the biggest idiots in the galaxy." - If this forum was a Mars Colony

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#258 2021-12-11 11:37:56

Terraformer
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From: Ceres
Registered: 2007-08-27
Posts: 3,560
Website

Re: Un- conventional ways to LEO

Hmm, this would also work as a means to launch bulk payloads off Mars. Oxyhydrogen should be able to reach the required velocity in one shot. It should be within the industrial capabilities of an early Mars colony to build such a structure? Far simpler than a railgun or coilgun. Still needs a circularisation rocket of course.

I wouldn't do it on Luna, but Mars has plenty of ice, and the bulk of the water will condense back out rather than being shot into space.


"I'm gonna die surrounded by the biggest idiots in the galaxy." - If this forum was a Mars Colony

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#259 2021-12-11 12:22:45

tahanson43206
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Registered: 2018-04-27
Posts: 11,960

Re: Un- conventional ways to LEO

For Terraformer re #258

Your idea is certainly of interest (to me for sure)

Are you aware of the work done by D. John Hunter?  There is probably more than one write-up in the forum, but here is the first I found:

http://newmars.com/forums/viewtopic.php … 76#p151976

Please ignore the response of someone in the forum.  It is Not necessary to circularize an orbit if you are sending something on to Earth from Mars, if my understanding of Dr. Hunter's work is correct.  If you have a friend who is good with orbital calculations (on one hand) and good with ballistics calculations (on the other), you may find that the system described by Dr. Hunter would work nicely on Mars.

The key thing you might discover if you study Hunter's work is that the gas gun depends upon the low molecular weight of Hydrogen to achieve the velocities needed.  Oxygen does NOT contribute to the success of the system.

(th)

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#260 2022-04-04 09:47:58

Mars_B4_Moon
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Registered: 2006-03-23
Posts: 4,782

Re: Un- conventional ways to LEO

Jeff Matthews joins Radian Aerospace as director of strategy
https://spacenews.com/mattews-joins-radian/

Radian raised $27.5 million in a seed funding round announced in January for development of a fully reusable, single-stage-to-orbit spaceplane that takes off and lands horizontally.

“The cost of transporting humans to orbit is at an inflection point that will create large-scale change in the market,” Matthews said. At the same time, Radian’s cargo capability will be one of the keys to development of a vibrant low Earth orbit economy, he added.

To date, spaceplanes have tended to launch vertically and have not shown the level of rapid reusability that Radian seeks.

“It will take a lot to get there, but we’re up for the challenge,” Matthews said.

As Radian’s strategy director, Matthews will be in charge of assessing the market and Radian’s competition. Matthews also will be tasked with building relationships with U.S. government customers and establishing strategic industry partnerships.

“Jeff is an incredibly well-respected and accomplished leader in the space sector and his work around the commercialization of LEO directly shaped the industry,” Richard Humphrey, Radian CEO and co-founder, said in a statement. “The expertise and knowledge he brings to the table is unparalleled and we are confident Jeff will add significant value to the work we are doing to transform the industry and succeed in our mission.”

Matthews led Deloitte’s work on the 2018 NASA study on commercializing low Earth orbit and on the Vandenberg Space Force Base Commercial Master Plan. He also contributed to an independent analysis of commercial high-speed transportation for NASA and to Deloitte’s updated report on commercialization of low Earth orbit.

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#261 2022-10-04 06:41:07

Mars_B4_Moon
Member
Registered: 2006-03-23
Posts: 4,782

Re: Un- conventional ways to LEO

With Sanctions against the Soyuz after the Russian invasion of Ukraine they are looking to more ways to access space again, Branson will have his Virgin Orbit rocket packed full of satellites, which will then be flown to high altitude, dropped, and ignited before flying into space.

and Spin lunches also looked at.

Satellite-flinging SpinLaunch puts NASA payload through the wringer
https://newatlas.com/space/satellite-sp … st-flight/

Wellcamp ‘spaceport’: Branson’s rockets to launch from Qld in landmark deal
https://www.themercury.com.au/news/quee … c322b36623

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#262 2022-10-25 17:22:44

Mars_B4_Moon
Member
Registered: 2006-03-23
Posts: 4,782

Re: Un- conventional ways to LEO

Some in news media say it could be a Chinese version of the X-37

China’s spaceplane raises orbit and national funding

https://spacenews.com/chinas-spaceplane … l-funding/

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