I have the following equations: where k is the mass flow rate (mass divided by b
ID: 2014915 • Letter: I
Question
I have the following equations:
where k is the mass flow rate (mass divided by burn time)
Given that:
m0= initial mass= 200/gc Sl
mf= final mass= 100/gc Sl
tb= burn time= 50 sec
Isp= Specific Impulse= 300 Sec
Sref= Reference Area= 0.5*pi/4 ft^2
CD= Drag Coefiicient= 0.20
An exponential model of the atmosphere is used:
Where rho0= 0.002377 sl/ft^3 and beta= 23,800 ft
The acceleration due to gravity varies with altitude:
where R= radius of earth= 2.0925672x10^7 ft and gc= 32.17 ft/s^2
The problem asks for the max height of the rocket which is integrated in two stages, first when the motor is burning and thus producing thurst, and then from when the motor burns out until the vertical velocity reaches zero. I need the altitude and velocity when the motor burns out, as well as the final time, altitude, and velocity when the velocity goes to (approximately) zero.
Thank you for the help.
Explanation / Answer
il have to think about that