Pallabazzer 



•; 



IR- F(U 



-cm 



b) 





D 



C P 



Fig. 23 - Hydrojector bypass powerplants 



A pressure loss &/3 is taken into account at the valves v^ of the powerplant. 

 In the aforementioned figures, the abbreviations of the configurations which 

 have been studied are given too. 



4.2 Criticism 



Here we will expound the reasons which led us to conceive and to analyze 

 the previous configurations. As mentioned, the pure hydrojector was fairly well 

 studied and designed in the literature, and its general advantages have been al- 

 ready emphasized, but what we would investigate was the overall effect on the 

 propulsive performance of using hot, high-pressure, partially exhaust gas, in- 

 stead of a cold gas (compressed air). The partially exhaust gas can provide 



1136 



