"William R Thompson" wrote in message
ink.net...
"Dave Kearton" wrote:

William R Thompson wrote:

"muff528" wrote:

"William R Thompson" wrote:

(about Wally Schirra's elapsed time in space)

Sigma 7: 9 hours 13 minutes 11 seconds
Gemini 6: 25 hours 51 minutes 43 seconds
Apollo 7: 260 hours 9 minutes 3 seconds

which adds up to 295 hours 13 minutes 57 seconds.

Is that taking relativistic time dilation into consideration?
That's got to be good for a -second or -two!

At orbital speed (about 8 km/sec) time dilation doesn't even
amount to one second over 295 hours. If I've crunched the
number right, it's in the microsecond range.

If it's NASA, maybe they've mixed metric and SAE units ?

No, although they did give the orbital speed in furlongs per fortnight.

I made the time-dilation factor as about 0.999999999644 (square
root of 1 minus beta-squared), with Schirra spending about 1062000
seconds in space at orbital speed and beta equal to 8 km/sec over the
speed of light (close enough to 300,000 km/sec). Schirra would have
lost about 400 microseconds.

--Bill Thompson



From his point of view didn't *we* lose the ~400ms ?