652 



PROCEEDINGS OP THE AMERICAN ACADEMY. 



that regenerative cycle which corresponds to the V T,. corner. Its effi- 

 ciency and work are both as high as any in the tables, and its comj^res- 

 siou ratio is comparatively low. Even the isothermal cycles are usually 

 to be preferred to any of the Brayton type on account of the much 

 larger values of W which they involve. 



The results to which this investigation has led are : (1) that of the 

 three types considered, the regenerative cycle is, theoretically, the best 

 for gas turbines, and (2) that a definite compression ratio as well as a 



50 



150 



350 400 450 500 



Q in BTU 



200 250 300 



Figure 18. 

 Type C. Work. For regenerative cycles. (Cf. Figures 7 and 12 



TABLE 5. The Work Cycles. 



