"Ned Ludd" <
ned...@ix.netcom.com> wrote in message
news:7JydnfWef70q7OHH...@earthlink.com...
> "daletx" <
dal...@gnusguy.com> wrote in message
> news:p5hnn...@news2.newsguy.com...
>> On 2/8/2018 7:56 AM, Wilson wrote:
>>> On 02/07/18 11:55 PM, Ned Ludd wrote:
FYI, I had a free minute, so I calculated how many cars
it would take to create "auto gridlock" in orbit around earth.
Wiki defines "low Earth orbit" as an altitude of 1,200 miles
or less, with 99 miles being the lowest possible, before
atmospheric drag will cause rapid orbital decay and altitude
loss. Gemini 11 orbited at 854 miles. Satellites do not usually
orbit below 180 miles.
The International Space Station is at 250 mi. The Gravity
Field and Steady-State Ocean Circulation Explorer (GOCE)
is at 340 mi.
At 200 miles, the velocity required to maintain orbit is 7.79
km/s, or 16,826 miles per hour.
So let's take the altitude where the smart people (ie. the
corporations) put their satellites, which is at or above 180
miles, call it 200 miles. And let's define "auto gridlock" as
bumper-to-bumper traffic.
So, how many cars, bumper-to-bumper, would it take to
fill a circle, 200 miles above the earth's surface?
According to wiki, 'large family cars' are between 177
and 189 inches long (tending toward the latter, lately),
and 'small family cars' are between 169 and 175 inches.
Let's take the midpoint between the longest small car
(175 inches) and the smallest long car (177 inches), and
call it 176 inches, which is 14.67 feet.
Earth is 7,918 miles in diameter, or a radius of 3,959 mi.,
and 200 miles above earth would be a radius of 4,159 mi.
A circle with a radius of 4,159 would have a circumference
of 26,132 miles, which is 137,975,617 feet.
And if there were a car every 14.67 feet of that 137,975,617
foot circumference, that would be 9,405,291 cars.
All going at 16,826 miles per hour. Sounds like California!
AND, according to wiki, "as of 2010 there were 1.015 billion
motor vehicles in use in the world."
So we could do it! In fact, if we used all 1.015 billion cars,
we could create 108 rings of bumper-to-bumper traffic at
200 miles above earth. (All going 17 thousand mph.)
Ned