Ever heard of a solar sail? (Page 2/3)
rinselberg APR 08, 04:04 PM
NASA Solar Cruiser (scroll back a short ways) is "out there", but the Breakthrough Starshot initiative is really, really "out there". It's an idea to propel very small instrumented space probes all the way to the nearest star, about 4 light years distant from Earth, using sail technology. Not solar sail, but laser sail.

"Lightsail technology 'billows' into the future"
Samantha Hill for Astronomy; March 17, 2022.
https://astronomy.com/news/...lows-into-the-future

[This message has been edited by rinselberg (edited 04-08-2022).]

rinselberg APR 09, 02:46 PM
The aforementioned NASA Solar Cruiser mission, currently expected to launch in 2025, has a solar sail that unfolds to almost 1600 square meters.

A previous NASA Project, dubbed "Sunjammer", was planned with a solar sail of 1200 square meters. But that project was canceled in 2014, after more than a 4-year effort and $21 million in expenditures by the famed space agency, that aimed to combine the thrills of America's Cup-style yachting with the chills of interplanetary space. Henceforth, this memorable alliteration in the form of a banner for a news report; to wit:

"NASA Nixes Sunjammer Mission, Cites Integration, Schedule Risk"
Dan Leone for SPACENEWS; October 17, 2014.
https://spacenews.com/42227...ation-schedule-risk/

Sunjammer —a "catchy" and rather poetic name for a NASA space mission. The aborted ancestor to Solar Cruiser, which some may consider a "kitschy" moniker, in comparison.

Long live Sunjammer!

[This message has been edited by rinselberg (edited 04-09-2022).]

Valkrie9 APR 09, 06:21 PM

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Suggestions for curious minds, the pff bot.

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Mistaken for Linda Carter, she is Madeline Smith.
Pin-ups on Pedals
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Having a few proposals for solar powered propulsion systems, let us first power our planet to store the power to drive the solar sails by concentrated particle beams, lasers, masers, rays.
Space and time, relatively speaking, is curved by gravity, which is difficult to comprehend for three dimensional viewers.
The vastness of our universe then precludes the conventional gas propelled rockets for exploration, approaching C, the velocity required distorting time.
A few hundred years of growing maturity needed to evolve into a peaceful, curious species before our guardian angels allow us to travel beyond our star system in search of our maker, a quest for the Grail.
' Answer these questions three... '
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Orbiting Solar Power Mirrors
Mirror Arrays Orbiting to Provide Light and Power on the Dark side of our Planet
Japan's plan to orbit solar arrays for perpetual power.


' She can't make warp speed 9, Captain Kirk, we just don't have the power ! '
~ Chief Engineer Montgomery Scott, Star Ship Enterprise
IMSA GT APR 09, 07:20 PM
And as always Valkrie, you post irrelevant bullshit regarding the subject at hand and try to sidetrack the thread to your own mental, delusional way of thinking. Go back to the home and take your meds. Then go find another forum to put up with your crap.

[This message has been edited by IMSA GT (edited 04-09-2022).]

blackrams APR 09, 08:21 PM

quote
Originally posted by cvxjet:

And here is a simulation of what a real Solar Sail would look like....






Rudder?

Rams
williegoat APR 09, 09:28 PM

quote
Originally posted by blackrams:


Rudder?

Rams
Valkrie9 APR 09, 10:07 PM

Centripetal station, maintenance and command, solar array power generation.
Eventually, we are leaving to explore the far reaches of our solar system, powered by star drives.
As in the past, there will always be the stinker, a fake bs trader.
Try to calm yourself and refrain from ad hominem attacks, cut and pasted from your stinking book of intolerance.
I would deduce then, that a man of your ilk has never suffered the trials and tribulations of a life of risk and consequence, so easily the bs leaves your lips.
I have met and worked with men of some accomplishments, they sure don't sound anything like you, a whiner, griper, always complaining about how the net makes you feel.
A lingering whiff, bad eggs n fish.
Valkrie9 APR 11, 12:00 AM

Solar Sails, the math behind solar sails
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Space Kadets !
Pay attention !
Determine the differences of the design and construction of the Andromeda Solar Drive and the Earth Orbiting Solar Power Reflectors.
The importance of your designs and data are for the control of the planet's future environmental sphere, the power's safety and cleanliness.
Begin design of the Terran Power Receivers, Hydrogen Zeppelin Elevated Equatorial Arrays, Global Girthing Stations.
Yeah, nice, clean, safe, energy for all, in the future, after the nuke war.
Cheer up, it won't be long.
hnthomps APR 11, 04:56 AM
I have not run the calculations but have a memory of initial acceleration at least being quite slow/moderate. Do not look at this methodology as propulsion mechanism for peopled extra solar system journeys unless you are going to consider a multi generational arc type of vessel.

Nelson
Valkrie9 APR 11, 06:16 AM


Non-Linear Dynamics of Ring World Systems Valid Concepts
Journal of the British Interplanetary Society, Vol. 35. pp. 475-497, 1982. More Maths and Ideas
Niven Ring Gravitational Stability java script calcs included !
Orbital Rings and Planet Building: Prelude to Colonizing the Solar System This is exciting imagineering !
Superpressure Balloon Calculator For when you wish to send it up !
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Clearly, a gyro stabilized platform is desirable.
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High altitude solar energy receivers, of earth orbiting reflecting mirrors, are necessary to optimize transmission, reduce losses.

So, you want to get high...on your way to building orbiting mirrors, then, solar sails mounted, then deployed, from rocket boosted interstellar spacecraft to the nearest earth-like extra-solar planet.