Photos tagged 'specific impulse'

Mission elapsed time at brennschluss: 30s. Close enough, considering ISP...

Fri, 31 Aug 2012 10:16:22 GMT

Mission elapsed time at brennschluss: 30s. Close enough, considering ISP varies with atmospheric pressure (i.e. altitude), and the inaccuracy of the mission timer.

Photo by Corax

If you do the calculation with the Isp at sea level, you get...

Fri, 31 Aug 2012 10:16:02 GMT

If you do the calculation with the Isp at sea level, you get

mdot=215kN/320s*9.81m/s2
=215000N/3139.2m/s3
=68.49kg/s

and thus

t=m/mdot
=2000kg/68.49kg/s
=29.20s

Photo by Corax