Preliminary Design and Analysis of Supersonic Business Jet Engines by Timo Schlette, Stephan Staudacher

“…Currently projected supersonic business jets target selected supersonic flight missions with Mach numbers of about 1.4 and a larger number of long-range subsonic flight missions. They form a new type of aircraft that is specially tailored to these requirements. …”
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Handbook of Jet Engines / by Luther, Mira, author 646452

“…Early jet aircraft used turbojet engines which were relatively inefficient for subsonic flight. Modern subsonic jet aircraft usually use high bypass turbofan engines which give high speeds, as well as (over long distances) better fuel efficiency than many other forms of transport.…”
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CALCULATION AND REGULATION FEATURES OF DUCT-BURNING TURBOFAN ENGINE AT RAMJET MODES by Олег Владимирович Кислов, Михаил Анатольевич Шевченко

“…However, they do not have starting thrust and uneconomical at subsonic flight speeds. At the same time, at subsonic flight speeds, turbofan engines are the most expedient. …”
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Statement and general technique for solving problem of oscillation of a hereditarily deformable aircraft by Usmonov Botir, Rakhimov Quvvatali, Akhmedov Akhror

“…The generalized forces acting on the aircraft in the subsonic flight mode are determined according to the stationarity hypothesis. …”
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The Optimization of Aircraft Acceleration Response and EDR Estimation Based on Linear Turbulence Field Approximation by Debao Wang, Zhenxing Gao, Hongbin Gu, Xinyu Guan

“…A vertical acceleration estimation based on the unsteady vortex lattice method (UVLM) was proposed, in which the air-compression effects in high-subsonic flight were compensated by the Karman–Tsien rule. …”
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Study of The Flying and Handling Qualities of a Glider-Type Aircraft for Instruction Purposes by Yeinson Alfonso Castellanos Sanabria, German Wedge Rodríguez Pirateque

“…For the development of this project, we propose a dynamic model where we introduce small disturbances to calculate the longitudinal trim state in subsonic flight conditions. Using longitudinal trim data, we showed the linearized equations of motion to find the dimensionless and dimensional numerical values for aerodynamic stability and control derivatives along the longitudinal and lateral-directional axes. …”
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Numerical Investigation of the Aerofoil Aerodynamics with Surface Heating for Anti-Icing by Bowen Li, Qiangqiang Sun, Dandan Xiao, Wenqiang Zhang

“…NACA0012, RAE2822 and ONERA M6 aerofoils were adopted as the test cases and the simulations were performed in the subsonic flight condition of commercial passenger aircraft. …”
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Improving the Lift Characteristics of Supersonic Double 257 Wedge Airfoil at Low Speed Using Passive-Active Flow Controlling Methods by Mohammed I.Abutabikh, AbdulKareem Al-Musawi, Mohammed K. Khashan

“…The proposed passive method was a shape modification through changing the sharp leading edge and mid- section upper and lower surface apex to smooth curved control segment actived during subsonic flight regime; and the blowing technique was used as an active method. …”
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The effect of centre-elevator on aerodynamics of UiTM baseline-1 blended wing body (BWB) unmanned aerial vehicle (UAV) at low subsonic speed / Rizal Effendy Mohd Nasir .. [et al.] by Mohd Nasir, Rizal Effendy

“…Aerodynamic parameters are computed via computational fluid dynamics method based on RANS to simulate low subsonic flight at Mach 0.3 sea level ISA. Discussions focus on the effect of elevator deflection to lift, drag and moment curves at small angles of attack within linear region ofCL-α curve. …”
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Changing patterns of the optimal composition and parameters of propulsions with ramjet ducts from the supersonic cruising flight speed by Oleh Kislov, Mykhailo Shevchenko

“…However, a ramjet has no starting thrust and is uneconomical at subsonic flight speeds. Combined propulsion with a turbojet duct for takeoff and a ramjet duct for supersonic cruise flight are used to overcome this contradiction. …”
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EFFICIENT TRACTION AND EXTERNAL RESISTANCE OF AIRCRAFT POWER PLANT by Юрий Юрьевич Терещенко, Иван Алексеевич Ластивка, Павел Владимирович Гуменюк, Су Хунсян

“…The obtained dependencies show the influence of the external resistance of the engine nacelle on the effective thrust of the bypass engine at subsonic flight velocities. The calculations were performed to lengthen the nacelle in the range from 4 to 8.…”
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Onboard trajectory generation for the unpowered landing of autonomous Reusable Launch Vehicles by Girerd, André R. (André René), 1977-

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A Nonlinear Adaptive Autopilot for Unmanned Aerial Vehicles Based on the Extension of Regression Matrix by Quanwen Hu, Yue Feng, Liaoni Wu, Bin Xi

“…Finally, the proposed system is verified on a high-subsonic flight subject to nonlinear uncertainties, with simulation results showing improved control accuracy and enhanced robustness. …”
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Sensitivity of the ozone layer, climate, and public health to changes in the location of aviation emissions by Kim, Joonhee

“…Applying this model to multiple emission scenarios, this thesis explores the variation in environmental impacts across subsonic flights on the basis of flight distance, and across potential supersonic flights with differing cruise altitudes. …”
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