STS total burn rate/mass

At http://www.cdli.ca/CITE/sts_ascent.htm , Jim Cornish writes:

"By the end of the eighth second, the shuttle has traveled only twice
it own length in distance [and] has already accelerated to 161
kilometers per hour (100 mph.) During this short time, the orbiter's
three main engines and two solid rocket boosters have consumed more
than 680,000 kilograms (1.5 million pounds) of fuel."

That's 1/3 of GLOW, and can't be correct. The 2 SRBs are about 2.6M
pounds at ignition and a bit under 400K pounds empty, so the back of
my envelope says they must average (yes, I know it's not constant) aa
bit less than ten tons a second over their 2-minute burn period. And
ISTR the SSMEs go through about half a ton a second.

That would suggest the stack actually gets down to 3M pounds (2/3 of
GLOW) at about 70 seconds. Is that in the right ballpark?

And when would it be at 1.5M pounds (~1/3 of GLOW) -- presumably after
SRB separation, but at roughly what time, velocity and altitude?

On Aug 9, 2:42 pm, Monte Davis wrote:
Athttp://www.cdli.ca/CITE/sts_ascent.htm, Jim Cornish writes:

"By the end of the eighth second, the shuttle has traveled only twice
it own length in distance [and] has already accelerated to 161
kilometers per hour (100 mph.) During this short time, the orbiter's
three main engines and two solid rocket boosters have consumed more
than 680,000 kilograms (1.5 million pounds) of fuel."

That's 1/3 of GLOW, and can't be correct. The 2 SRBs are about 2.6M
pounds at ignition and a bit under 400K pounds empty, so the back of
my envelope says they must average (yes, I know it's not constant) aa
bit less than ten tons a second over their 2-minute burn period. And
ISTR the SSMEs go through about half a ton a second.

That would suggest the stack actually gets down to 3M pounds (2/3 of
GLOW) at about 70 seconds. Is that in the right ballpark?

And when would it be at 1.5M pounds (~1/3 of GLOW) -- presumably after
SRB separation, but at roughly what time, velocity and altitude?

WHOOOOAAAA . . .. on topic thread . . . *S*

John wrote:

That would suggest the stack actually gets down to 3M pounds (2/3 of
GLOW) at about 70 seconds. Is that in the right ballpark?

And when would it be at 1.5M pounds (~1/3 of GLOW) -- presumably after
SRB separation, but at roughly what time, velocity and altitude?

WHOOOOAAAA . . .. on topic thread . . . *S*

Thanks.