Results 1 to 10 of about 353,662 (303)

NASA/DOE/DOD nuclear propulsion technology planning: Summary of FY 1991 interagency panel results [PDF]

open access: yes
Interagency (NASA/DOE/DOD) technical panels worked in 1991 to evaluate critical nuclear propulsion issues, compare nuclear propulsion concepts for a manned Mars mission on a consistent basis, and to continue planning a technology development project for ...
Bhattacharryya, Samit K.   +5 more
core   +1 more source

Janus droplet as a catalytic micromotor

open access: yes, 2015
Self-propulsion of a Janus droplet in a solution of surfactant, which reacts on a half of a drop surface, is studied theoretically. The droplet acts as a catalytic motor creating a concentration gradient, which generates its surface-tension-driven motion;
Shklyaev, Sergey
core   +1 more source

Electric Machine Design and Integration for an Electric Propulsion System in Medium-Altitude Long-Endurance Unmanned Aerial Vehicles

open access: yesApplied Sciences
Unmanned Aerial Vehicles (UAVs) are increasingly used in both civilian and military applications around the world. There are several types of UAVs with classifications according to several quantities.
Emre Kurt   +3 more
doaj   +1 more source

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

open access: yes
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

Directions in propulsion control [PDF]

open access: yes
Discussed here is research at NASA Lewis in the area of propulsion controls as driven by trends in advanced aircraft. The objective of the Lewis program is to develop the technology for advanced reliable propulsion control systems and to integrate the ...
Lorenzo, Carl F.
core   +1 more source

Propulsion sizing program [PDF]

open access: yes, 1972
Computer program was written to evaluate and define optimum design parameters of low pressure auxiliary propulsion system. APS will provide attitude and translational control of space shuttle vehicles.
Burns, A. E., Kaemming, T. A.
core   +1 more source

Integrated propulsion for near-Earth space missions. Volume 1: Executive summary [PDF]

open access: yes
Tradeoffs between electric propulsion system mass ratio and transfer time from LEO to GEO were conducted parametrically for various thruster efficiency, specific impulse, and other propulsion parameters.
Dailey, C. L.   +3 more
core   +1 more source

Advanced onboard propulsion benefits and status [PDF]

open access: yes
Future commercial space systems may include geosynchronous-orbit communication satellites; Earth-observing satellites in polar, sun-synchronous orbits; and tended low-earth-orbit platforms.
Byers, David C.
core   +1 more source

Investigation of space rendezvous propulsion system requirements. Volume I - Summary Final report, 20 Nov. 1961 - 19 Dec. 1962 [PDF]

open access: yes
Space rendezvous propulsion system requirements - phase and mission analyses, and propulsion system design ...
Lysdale, C. A.
core   +1 more source

Design and implementation of a rudder and propulsion control system for a USV prototype for the Hydrocontest international competition

open access: yesDerrotero, 2018
This paper describes the considerations taken into account in order to design and build an electronic control system to be used on an Unmanned Surface Vehicle (USV), in an effective, versatile and economic way, using Commercial Off-The-Shelf elements ...
Juan Pablo GutiĆ©rrez Bucheli   +1 more
doaj  

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