1. A fuel-rich solid propellant for a gas generator drives a turbine of a liquid propellant turbopump. Determine its mass flow rate. The following data are given:
![1259_6d67b5c5-9413-4a3e-ad6b-0f1168905fe9.png](https://secure.tutorsglobe.com/CMSImages/1259_6d67b5c5-9413-4a3e-ad6b-0f1168905fe9.png)
Windage and bearing friction is 10 kW. Neglect start transients.
2. The propellant for this gas generator has these characteristics:
Determine the size of an end-burning cylindrical grain.
![2387_f9e102a4-4bfc-4958-a540-ef65d3a520d0.png](https://secure.tutorsglobe.com/CMSImages/2387_f9e102a4-4bfc-4958-a540-ef65d3a520d0.png)