Results 61 to 70 of about 67,696 (213)

Optimal hybrid propulsion systems thrust trajectories in a patched-conic N-body force field [PDF]

Euler-Lagrange equations for approximating optimal thrust trajectories for limited hybrid propulsion system in N-body dynamic ...
Pines, S.
core   +1 more source

Advanced propulsion system for hybrid vehicles [PDF]

A number of hybrid propulsion systems were evaluated for application in several different vehicle sizes. A conceptual design was prepared for the most promising configuration.
Lintz, A. T., Norrup, L. V.
core   +1 more source

Energy Efficient and Environmentally Friendly Hybrid Conversion of Inland Passenger Vessel

Polish Maritime Research, 2017
The development and growing availability of modern technologies, along with more and more severe environment protection standards which frequently take a form of legal regulations, are the reason why attempts are made to find a quiet and economical ...
Litwin Wojciech, Leśniewski Wojciech, Kowalski Jakub   +2 more
doaj   +1 more source

Hybrid drive for motor vehicles with a preponderantly intermittent method of operation [PDF]

A flywheel hybrid propulsion system is compared with a conventional propulsion system in a test vehicle under intermittent operation. An energy balance is presented for the conventional propulsion system.
Schreck, H.
core   +1 more source

Mission Benefits of Gridded Ion and Hall Thruster Hybrid Propulsion Systems [PDF]

, 2006
The NASA In-Space Propulsion Technology (ISPT) Project Office has been developing the NEXT gridded ion thruster system and is planning to procure a low power Hall system.
Dankanich, John W., Polsgrove, Tara
core   +2 more sources

A Review of Hybrid-Electric Propulsion in Aviation: Modeling Methods, Energy Management Strategies, and Future Prospects

Aerospace
Aviation is under increasing pressure to reduce carbon emissions in conventional transports and support the growth of low-altitude operations such as long-endurance eVTOLs.
Feifan Yu, Jiajie Chen, Panao Gao, Yu Kong, Xiaokang Sun, Jiqiang Wang, Xinmin Chen   +6 more
doaj   +1 more source

An earth pole-sitter using hybrid propulsion [PDF]

, 2010
In this paper we investigate optimal pole-sitter orbits using hybrid solar sail and solar electric propulsion (SEP). A pole-sitter is a spacecraft that is constantly above one of the Earth's poles, by means of a continuous thrust.
Becerra V. M., Betts J. T., Driver J. M., Fahroo F., Fornberg B., Mengali G., Powell M. J. D., Quarta A. A., Wertz J. R.   +8 more
core   +2 more sources

METHODOLOGY OF THE HYBRID PROPULSION SYSTEM (DMP & DEP) FOR TRIMARAN TYPE FAST PATROL BOAT

Kapal, 2012
There are lot of research done to develop a patrol boat, from the modification of hull model until propulsion system equipment. For example the model ship type AMV (Advanced Marine Vehicle) was developed starting from the Catamaran, Trimaran and  ...
Aulia Widyandari, Dedy Wahyudi
doaj   +1 more source

Impact of radiation dose on nuclear shuttle configuration [PDF]

, 1972
The impact of nuclear radiation (from the NERVA propulsion system) on the selection of a reference configuration for each of two classes of the reusable nuclear shuttle is considered.
Billings, M. A., Goetz, C. A.
core   +1 more source

Generation of optimal trajectories for Earth hybrid pole sitters [PDF]

, 2011
A pole-sitter orbit is a closed path that is constantly above one of the Earth's poles, by means of continuous low thrust. This work proposes to hybridize solar sail propulsion and solar electric propulsion (SEP) on the same spacecraft, to enable such a ...
Becerra V. M., Becerra V. M., Betts J. T., Colin R. McInnes, Gershman R., Lazzara M. A., Leipold M., Leiter H. J., Matteo Ceriotti, McInnes C. R., Mori O., Simo J., Wertz J. R.   +12 more
core   +1 more source