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The best empty weight predictions were seen in the propulsion group. The largest variations between predicted and actual weight were seen in the fixed equipment group. ...Prediction methods in the geometry, aerodynamics, propulsion, weights and high lift modules need to be calibrated to a reference configuration of similar characteristics before performance can be reliably predicted.

A decentralized, multivariable controls methodology is being developed for the functional integration of a fighter's aerodynamic controls with those of its propulsion system (inlet, engine, and thrust vectoring/reversing nozzle). Integrated controls account for, and take advantage of the significant cross-coupling between these system elements.

The AF SAB found that sufficient progress had been made in the areas of aerodynamics, materials and structures, propulsion, and fuels during the past decade to support consideration of a new generation of aircraft.

Two separate systems are discussed with the first stage system providing control of aerodynamic surfaces and the second stage gimbaling the propulsion nozzle and also including reaction nozzle roll control. Both systems are supplied from solid propellant gas generators providing a supply gas at 1950°F.

The thrust of the fan itself is vectored so as to obtain a propulsion force. No other propulsive device is used. The ground effect take-off of GETOL fan-in-wing aircraft was investigated for a range of major aircraft parameters believed to be representative of the V/STOL aircraft regime.

In order to establish a propellant depletion system for propulsion shutdown on the Atlas space launch vehicle, design criteria have been closely examined to meet the unique environmental requirements in this particular application.

This paper describes the methods used for the performance modeling, which includes propulsion modeling methods and flight test procedures. The resulting flight test data are presented.

The proper conception of what an airship is having first been explained, the three principal ways in which progress has been made are specified as weight-saving, improvement of overall propulsion efficiency and decreasing resistance and increase in size. The last mentioned feature is discussed in some detail, the conclusion being that practically anything is possible, given an airship of sufficient size.

Significant advances applicable to vertical and short take-off and landing (V/STOL) aircraft have been made in aerodynamic, propulsion, composite structure and avionics technologies. These have been incorporated into the AV-8B Weapon System, whose performance has been demonstrated through the YAV-8B prototype flight program.

The problem is tackled, whatever the mode of propulsion of the vehicle ( combustion engine or electric motor and wheel transmission - or reactor ). ...The wheel propulsion mode and freewheel mode are considered in a similar way. The function of attitude correction uses an active system controlling a hydraulic jack mounted in the suspension.

Among these are its aerodynamics, propulsion system, structural concept, materials, avionics and passenger seat. Advanced technology in the 340 design will result in a quality airliner better able to provide economical, reliable service with greater passenger comfort.

The tradeoff data presented illustrate the ranges of wing geometries, propulsion requirements, airplane weights, and aerodynamic characteristics which are necessary to meet the design objectives. very large design and performance improvements resulted from use of the aerodynamic technologies evaluated.

While the Volt's propulsion system doesn't directly affect its shape efficiency, it does make aerodynamics much more important than in traditional vehicles.

The paper provides an overview of the renewed interest in turboprop propulsion systems for future commercial transport designs. The potential operating cost advantage of advanced turboprop designs is shown relative to advanced turbofan designs. ...Critical technology items for the aerodynamic installation of turboprop propulsion systems are presented, along with experimental results addressing the main technology issue for wing-mounted turboprop installations.

A summary of information on airplane aerodynamics, ground effects, propulsion system aerodynamics, stability and control, and flying qualities of jet V/STOL airplanes - both direct jet lift and lift fan configurations is presented. ...Experimental research on propulsion aerodynamics in the hovering and very low speed ranges of flight. 3. Flight-test experience on the flying qualities of several jet V/STOL airplanes.

To reach the environmental compromises, the aviation industry is required to bring fleet wide average fuel efficiency improvements of 2.5% per year, from 2020 to 2050, associated with the use of low carbon energy, such as certified sustainable aviation fuels (SAF) and, in the longer term, electric propulsion for specific aviation niches. The continuous efficiency improvement requirement relies on technological strategies, such as the reduction of aircraft weight (through the use of lighter and more resistant materials), engine propulsion (thermodynamic and propulsive) efficiencies, as well as aerodynamic (drag reduction) improvements. ...The continuous efficiency improvement requirement relies on technological strategies, such as the reduction of aircraft weight (through the use of lighter and more resistant materials), engine propulsion (thermodynamic and propulsive) efficiencies, as well as aerodynamic (drag reduction) improvements.

Jet flaps, because of their propulsive lift characteristics, have the theoretical potential to improve fighter aircraft performance. Studies have shown that to achieve these improvements afterburning jet flaps are required. The benefits gained are primarily at high lift coefficients; consequently, there is a significant interaction between the jet flap effects and the wing aerodynamics. In order to integrate the jet flap into fighter designs, short afterburners are necessary. Titanium sandwich construction appears to be the best structural concept for a jet flap.

Following the electrification trend observed in the automotive industry, the idea of an electric propulsion aircraft has also drawn attention and investments from a range of aviation industry stakeholders (including the world's largest aerospace companies) focused on both fuel burning reduction and environmental performance improvement (greenhouse gases (GHG), pollutants and noise emissions) potential of electric propulsion technology. Electric propulsion has the potential to provide more efficient, cleaner, quieter and more profitable aviation services, with potential benefits to both airlines and passengers. ...Following the electrification trend observed in the automotive industry, the idea of an electric propulsion aircraft has also drawn attention and investments from a range of aviation industry stakeholders (including the world's largest aerospace companies) focused on both fuel burning reduction and environmental performance improvement (greenhouse gases (GHG), pollutants and noise emissions) potential of electric propulsion technology. ...From a technical perspective , the aviation propulsion electrification strategy might involves the integration of electric powetrains into aircrafts into the i) all electric; ii) hybrid and iii) turboelectric approach.

The method requires an aerodynamic model, a propulsion model, and the segment trajectory specified in altitude and velocity coordinates. No small angle assumptions are made in the equilibrium equations and the trajectories are always continuous.

Wide scope systems studies of V/STOL propulsion were conducted by GE, encompassing the total air vehicle design and its operation in lift, transition, cruise, and STOL modes. ...To determine VTOL propulsion requirements, the author explains the necessity for incorporating the entire air vehicle into the analysis. ...It is felt that the performance indicated necessary by these studies is now attainable by the propulsion industry.