Search Results

Results show that such systems can be used effectively, from a performance standpoint, in a VTOL or STOL mode of operation. A supplementary assessment of potential applications of such vehicles is examined, with a brief look at economic factors and an examination of missions for which they might be effectively used.

FUNDAMENTAL considerations which govern the power and fuel requirements, maximum speed, safety, and practical utility of types of VTOL aircraft are enumerated and discussed. The most interesting types of VTOL aircraft such as the helicopter are discussed and evaluated in regard to their probable applicability to the various fields of usefulness in view of these fundamental considerations. ...It is recognized that there is an advantage in the power-controlled approaches of VTOL aircraft from small airports under all weather conditions. It is realized that there is research still needed to make the VTOL a more satisfactory aircraft. ...It is realized that there is research still needed to make the VTOL a more satisfactory aircraft.

The results of a general VTOL airplane ground effect investigation for one to four lifting turbojets installed in the fuselage and wings are presented in this paper. ...The study provides information that will be very useful in the preliminary design layout and evaluation phase of VTOL development. The tests described here were conducted in Bell Aerosystems jet impingement test facility, which utilizes plant compressed air to provide model exhaust gas flows and a steam ejector to induce inlet flow equal to the exhaust flow.

The short-to-medium haul VTOL passenger market growth has been limited by factors of equipment performance capability, equipment operating economics, and Federal constraint. ...In this study, the local and intercity markets susceptible to VTOL passenger movement are assessed, aircraft equipment requirements developed, and flight operational concepts described. ...It is indicated that a 40-50 place V/STOL passenger aircraft, operated VTOL normally, might provide competitive, subsidy-free transportation in the 1970 time period.

Abstract Statistical machine learning classification methods have been widely used in the fault detection analysis in several engineering domains. This motivates us to provide in this article an overview on the application of these methods in the fault diagnosis strategies and also their successful use in unmanned aerial vehicles (UAVs) systems. Different existing aspects including the implementation conditions, offline design, and online computation algorithms as well as computation complexity and detection time are discussed in detail. Evaluation and validation of these aspects have been ensured by a simple demonstration of the basic classification methods and neural network techniques in solving the fault detection and diagnosis problem of the propulsion system failure of a multirotor UAV. A testing platform of an Hexarotor UAV is completely realized.

To achieve these requirements, a special type of aircraft had to be developed and it appears that the aircraft needed is the VTOL. This paper presents the reasons for selecting the Tilt-Wing VTOL over other types of VTOL's as being competitive in Commercial Air Transportation. ...A comparative study of the direct operating cost of a comparable helicopter and fixed wing aircraft with the VTOL is presented along with a comparison of block time and block speed. The operational aspects of the VTOL short haul transport are discussed and the advantages and disadvantages are presented for both commercial and military operations. ...The operational aspects of the VTOL short haul transport are discussed and the advantages and disadvantages are presented for both commercial and military operations.

Develop Technical Standards for VTOL-Capable powered aircraft platform (AAM/SVO/eVTOL, etc.) training devices when conventional FSTD standards are not applicable.

STOL and VTOL craft will be utilized.

The ability to control unmanned systems from the cockpit of a manned tactical aircraft is coming closer to reality. Textron Systems and Textron Aviation have demonstrated manned-unmanned teaming – specifically the command and control (C2) of multiple unmanned aircraft systems (UAS), commonly referred to as drones, from a single manned military aircraft.

Recent studies and developments in VTOL aircraft by the U. S. Army have been to fill the requirement for a surveilance or observation aircraft.

Bell Helicopter will partner with Rolls-Royce to develop an optimized propulsion system for the Bell V-280 Valor and unmanned V-247 Vigilant vertical lift tiltrotor aircraft – the company’s candidate platforms for the U.S. Army’s Future Vertical Lift (FVL) program.

The case for a VTOL transport system is presented primarily against the background of European requirements, based on the use of fast low noise fan lift V/STOL aircraft. ...The fan lift formula leads to a wide range of V/STOL aircraft to meet worldwide STOL, V/STOL, and VTOL requirements, with excellent long-term development prospects.

VTOL and STOL aircraft play a significant role in the ever increasing mobility of the Armed Forces. The landing gear of these aircraft must be able to operate from rough, unprepared fields and must support the aircraft on soft soil as well as on irregular and pothole terrain.

The shrouded propeller is a natural propulsive device for VTOL. This has been proved by a demonstration of good VTOL capability in actual flight by a shrouded propeller VTOL airplane. ...This has been proved by a demonstration of good VTOL capability in actual flight by a shrouded propeller VTOL airplane. Thorough theoretical studies and tests of the shrouded propeller have been made.

Among various V/STOL configurations the jet lift concept is a very promising configuration for military transport aircraft, if hovering performance and low-altitude cruising are not major requirements. The main advantages of this concept are high speed, high productivity, and excellent mission flexibility. Having in mind these fundamental capabilities, Dornier has accomplished a design study for a light military V/STOL transport with lift engines in two removable pods. A brief description and performance summary of this aircraft is given. In order to gain full-scale experience and to investigate the special problems of the V/STOL jet transport discussed in this paper, Dornier is now building two experimental aircraft.

To be economical, a VTOL airplane can be expected to have a higher gross weight than a STOL or CTOL. VTOL transports permit major reductions in total time for accomplishing a mission. ...VTOL transports permit major reductions in total time for accomplishing a mission. The VTOL system will be cheaper than STOL or CTOL for short mission accomplishment times. It is necessary to evaluate total savings resulting for shorter mission accomplishment times, but this is difficult because the ability to do things faster permits doing more things in a different manner.

While GE Aviation’s T700 turboshaft engine has powered the U.S. Army’s Apache and Sikorsky helicopters for more than 46 years, the U.S. Army will replace the T700 with GE Aviation’s fully modular T901-GE-900 engine as part of the Engineering and Manufacturing Development (EMD) phase of the U.S. Army’s Improved Turbine Engine Program.