Some considerations on Pilot Rating are conducted by analysing handling qualities of a second order system. The transfer functions of a human pilot and a control system are assumed properly, and closed loop characteristics are investigated with servo-mechanism theory. The theoretical predictions seem to show a good insight into Pilot Rating.
Considerable interest exists today in the development of hypersonic lifting bodies which offers the possibility of rapid long distance travel within the earth's atomosphere. It is disirable to have a high Lift-Drag ratio for a vehicle which flies at fairly lower speed than orbital velocity. In this paper, a brief discussion of available theoretical and empirical results for hypersonic aerodynamic characteristics of flat-top wing body combination is given.
The properties of weakly ionized argon plasma flow premixed with N2 in the plenum chamber are studied by the spectroscopic technique. A preliminary study is made of the physical processes occuring in the plenum chamber, and it is demonstrated that three competitive reactions of ground state nitrogen molecule, free electron and ground state argon atom for metastable argon atom play an important role in the possible reactions. The rotational temperatures using the N2 2nd positive (0, 0) band are also measured taking account of the overlapping of P and R branches, and it is found that electron temperature is about twice as large as the rotational temperature. Such a measurement of the free stream in the test section is very difficult because of the lack of the knowledge of the excitation mechanism from X1Σ state of N2 to C3II by the metastable Ar atom.