Letters

Letters 09-15-2014

Stop The Games On Campus

Four head coaches – two at U of M and two at MSU – get a total of $13 million of your taxpayer dollars each year. Their staffs get another $11 million...

The Truth About Fatbikes

While we appreciate the fatbike trail coverage, the quote from the article below is exactly what we demonstrated not to be true in most cases last season...

Man Has Environmental Responsibility

I tend to agree with Thomas Kachadurian (“Playing God,” Sept. 8) that we should not interfere with the power of nature by deciding what is “native” and what is not. Man usually does what is better for man (or so we believe), hence the survival and population growth of our species...

The Bush & Obama Facts

Don Turner’s letter to the editor on 8/25/14 stated that there has never been a more corrupt, dishonest, etc. set of politicians in the White House. He states no facts, but here are a few...

Ban Pesticides

I grew up downstate in a neighborhood without pesticides. I was always very healthy. Living here, I have become ill. So I did my research and found out a lot about these poison agents called pesticides (herbicides, fungicides, insecticides, chemical fertilizers, etc) that are being spread throughout this community, accumulating in our air, water and soil...

Respect for Presidents?

Recently we read the Letter to the Editor that encouraged us to stop characterizing President Obama as anything other than an upstanding, moral, inspiring “first Black President”. The author would have us think that the rancor in the press, media and public is misguided. And, believe it or not, this rancor is a “glaring exception to … unwritten patriotic rule” of historically supporting all previous presidents...


Home · Articles · News · Features · Star Sailor
. . . .

Star Sailor

Harley Sachs - July 7th, 2005
There’s a whirligig gadget on my window sill that may have come from a science museum, for it illustrates a power of light that is now being applied to space flight. It resembles a clear glass light bulb, but instead of a filament inside there’s a little windmill -- four black and white paddles that rotate on needle mounted in a pillar of glass. When sunlight strikes the paddles the gadget turns and in bright sunlight it spins. As long as the sun shines on it, it keeps on spinning.
The principle is simple: the pressure of the beams of light striking the blades causes the gadget to spin. This wouldn’t work if the blades were not sealed in a vacuum, for the pressure of the light is not strong enough to turn the blades in the presence of resistant air. This might seem like a perpetual motion machine, were it not for two factors. Eventually the pivot point where the blades rest on the column will wear out. So far, after many years on my window sill, that hasn’t happened. What has prevented this device from running forever is that the glass is not totally impermeable. Atom by atom, air has penetrated the glass so it is not a perfect vacuum and it takes more and more intense sunlight to make it turn.
But what if the same principle were applied to a sail on a space ship? Then, like the marvelous prairie schooner of Pecos Bill sailing across the sea of grass of our Great Plains, a space ship would go on in the vacuum of space, accelerating forever.

ULTRA-THIN SAILS
That was precisely the intention of a new space experiment launched from the Russian nuclear submarine Borisoglebsk. A Volne intercontinental ballistic missile was modified to carry the sailing space vehicle, Cosmos-1 and launched on what was planned to be a 500 mile high orbit. That was a nice peaceful modification for an otherwise lethal ICBM.
According to the website for the California-based Planetary Society, which sponsored the craft, signals were recorded independently at three ground stations, at Petropavlovsk in Kamchatka, Majuro in the Marshall Islands and Panska Ves in the Czech Republic, that Cosmos-1 was expected to pass over.
The society web page describes the Cosmos 1 as having eight triangular sails, each 50 feet long with the spacecraft’s body at the center. If the launch was successful, once reaching orbit the space craft would open the ultra-thin sails to be driven by the power of impacting photons from the sun, just like my window sill gadget.
This is seen as a solution for space flight, for such a space ship doesn’t need to carry fuel for propulsion. Like my 22-foot-sloop which sails Lake Superior on free wind, the Cosmos-1 would sail through space propelled by the pressure of a kind of solar wind.

MISSING
Unfortunately, although it was sponsored by Planetary Society enthusiasts from around the world, the Cosmos-1 has gone missing.. Apparently one engine of the Volne missile failed and the Cosmos-1 disappeared.
This doesn’t mean that the adventure is over. If you visit their web site you’ll discover that the Society sells T shirts, Cosmos-1 souvenirs, and posts a great deal of information about space flight going back to the days of Jules Verne and other science fiction imagineers for whom the Cosmos-1 is a present reality.
Now when I look at that little spinning solar windmill on my window sill, I will think of the Cosmos-1 and adventures of future sailors in space.





 
  • Currently 3.5/5 Stars.
  • 1
  • 2
  • 3
  • 4
  • 5
 
 

 

 
 
 
Close
Close
Close