Section 11.4\ 11.1 A two-stage, solid-propellant sounding rocket has the following properties:\ First stage:

m_(0)=249.5kg,m_(f)=170.1kg,m_(e)^()=10.61kg,sI_(sp)=235s

\ Second stage:

m_(0)=113.4kg,m_(f)=58.97kg,m_(e)^()=4.053kg,sI_(sp)=235s

\ Delay time between burnout of first stage and ignition of second stage:

3s

.\ As a preliminary estimate, neglect drag and the variation of earth's gravity with altitude to calculate the maximum height reached by the second stage after burnout.\ {Ans.:

322km

}

11.1 A two-stage, solid-propellant sounding rocket has the following properties: First stage: m0=249.5kg,mf=170.1kg,me=10.61kg,sIIsp=235s Second stage: m0=113.4kg,mf=58.97kg,me=4.053kg,sIsp=235s Delay time between burnout of first stage and ignition of second stage: 3s. As a preliminary estimate, neglect drag and the variation of earth's gravity with altitude to calculate the maximum height reached by the second stage after burnout. \{Ans.: 322km \} 11.1 A two-stage, solid-propellant sounding rocket has the following properties: First stage: m0=249.5kg,mf=170.1kg,me=10.61kg,sIIsp=235s Second stage: m0=113.4kg,mf=58.97kg,me=4.053kg,sIsp=235s Delay time between burnout of first stage and ignition of second stage: 3s. As a preliminary estimate, neglect drag and the variation of earth's gravity with altitude to calculate the maximum height reached by the second stage after burnout. \{Ans.: 322km \}