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Posted by John Schilling on February 27, 2008, 8:34 pm
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On Tue, 26 Feb 2008 22:15:30 -0000, "Mike Dworetsky"
>>>If you take interplanetary travel into consideration, then anything on
>>>the equator has cheapest access to earth orbit.
>> But the difference isn't really all that much.
>>>You also want an east coast where you can use the ocean as a saftey
>>>buffer.
>> You can also launch to the west.
>> D.
>> Touch-twice life. Eat. Drink. Laugh.
>> http://derekl1963.livejournal.com/
>> -Resolved: To be more temperate in my postings.
>> Oct 5th, 2004 JDL
>>Only if you add two extra stages to the launch rocket, plus lots of extra
>shielding to counteract the small particles of disintegrated satellites
>moving in orbit the opposite direction. All that stuff reduces payload to
>the vanishing point.
Shavit-1 only has three stages; are you saying that if it launched to
the east it would have been a single-stage-to-orbit vehicle? Man, the
Israelis are even better at this than I thought...
And AFIK, none of the Ofeq satellites have yet been destroyed by orbital
debris. For reasons which are left as an exercise for the student.
--
*John Schilling * "Anything worth doing, *
*Member:AIAA,NRA,ACLU,SAS,LP * is worth doing for money" *
*Chief Scientist & General Partner * -13th Rule of Acquisition *
*White Elephant Research, LLC * "There is no substitute *
*John.Schilling@alumni.usc.edu * for success" *
*661-951-9107 or 661-275-6795 * -58th Rule of Acquisition *
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Posted by Michael Ash on February 27, 2008, 9:06 pm
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> And AFIK, none of the Ofeq satellites have yet been destroyed by orbital
> debris. For reasons which are left as an exercise for the student.
Ooh, I know this one:
"Space is big. You just won't believe how vastly, hugely, mind-bogglingly
big it is. I mean, you may think it's a long way down the road to the
chemist's, but that's just peanuts to space."
--
Michael Ash
Rogue Amoeba Software
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Posted by John Mianowski on February 27, 2008, 9:20 pm
Please log in for more thread options On Feb 26, 12:43 pm, fairwa...@gmail.com (Derek Lyons) wrote:
> >If you take interplanetary travel into consideration, then anything on
> >the equator has cheapest access to earth orbit.
>
> But the difference isn't really all that much.
>
> >You also want an east coast where you can use the ocean as a saftey
> >buffer.
>
> You can also launch to the west.
Launching Eastward gives you the speed of the Earth's rotation (almost
1000 mph @ equator) in your favor. Launching Westward, you'd have it
working against you.
JM
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Posted by Derek Lyons on February 27, 2008, 10:34 pm
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>On Feb 26, 12:43 pm, fairwa...@gmail.com (Derek Lyons) wrote:
>> >If you take interplanetary travel into consideration, then anything on
>> >the equator has cheapest access to earth orbit.
>>
>> But the difference isn't really all that much.
>>
>> >You also want an east coast where you can use the ocean as a saftey
>> >buffer.
>>
>> You can also launch to the west.
>
>Launching Eastward gives you the speed of the Earth's rotation (almost
>1000 mph @ equator) in your favor. Launching Westward, you'd have it
>working against you.
That was a Big Deal back in the stone ages of the 1950's. Like so
much else that was a Big Deal back then, it is essentially meaningless
now.
D.
--
Touch-twice life. Eat. Drink. Laugh.
http://derekl1963.livejournal.com/
-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL
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Posted by John Mianowski on February 28, 2008, 10:12 am
Please log in for more thread options On Feb 27, 9:34 pm, fairwa...@gmail.com (Derek Lyons) wrote:
> >On Feb 26, 12:43 pm, fairwa...@gmail.com (Derek Lyons) wrote:
> >> >If you take interplanetary travel into consideration, then anything on
> >> >the equator has cheapest access to earth orbit.
>
> >> But the difference isn't really all that much.
>
> >> >You also want an east coast where you can use the ocean as a saftey
> >> >buffer.
>
> >> You can also launch to the west.
>
> >Launching Eastward gives you the speed of the Earth's rotation (almost
> >1000 mph @ equator) in your favor. Launching Westward, you'd have it
> >working against you.
>
> That was a Big Deal back in the stone ages of the 1950's. Like so
> much else that was a Big Deal back then, it is essentially meaningless
> now.
I don't know about that. A nearly 2000 mph swing in the speed you
start with can have a fair effect on how much fuel you need to get to
orbital speed, & hence the payload you can launch with a given
vehicle. I think it's a valid consideration & still favors launching
Eastward over water. I'd reserve "essentially meaningless" for
something on the order of whether you'd need a Suburban vs. Expedition
to tow a trailer.
JM
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>>>the equator has cheapest access to earth orbit.