Results 31 to 40 of about 73,378 (313)

Overview on hybrid propulsion [PDF]

open access: yesProgress in Propulsion Physics, 2011
Aside of research works, this historical survey shows propulsion units used by students for small satellites and for gas generation, or those for the Space Ship One, even if LOx/HTPB was studied and tested in large motors for its potential very low cost; however, this combination highlights a series of technical problems without any performance ...
openaire   +1 more source

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

open access: yes, 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.   +12 more
core   +1 more source

Techno-economic investigation of alternative propulsion systems for tugboats

open access: yesEnergy Conversion and Management: X, 2021
In this paper, the main alternative propulsion systems based on internal combustion engines and batteries of a tugboat operating in harbour duties of the tugboat that include Emission Control areas are comparatively assessed.
Ömer Emre Karaçay   +1 more
doaj   +1 more source

Analysis Leading to the Design of a Hybrid Gas-Electric Multi-Engine Testbed

open access: yesAerospace, 2023
Given the increase in air traffic, the main challenges in aircraft design are in-flight emissions and noise heard by the community. These problems have thus far been solved by incremental improvements in aerodynamics, engine technology and operation.
Agata Kuśmierek   +3 more
doaj   +1 more source

Energy Saving Potential of Hybrid Propulsion System for Fishing Vessels in Indonesia [PDF]

open access: yesE3S Web of Conferences
Indonesia, as the largest archipelagic country in the world, has a fishing vessel fleet dominated by conventional diesel engine-based propulsion systems.
Ma’arif Samsul   +2 more
doaj   +1 more source

Challenges of Ablatively Cooled Hybrid Rockets for Satellites or Upper Stages

open access: yesAerospace, 2021
Ablative-cooled hybrid rockets could potentially combine a similar versatility of a liquid propulsion system with a much simplified architecture. These characteristics make this kind of propulsion attractive, among others, for applications such as ...
Francesco Barato
doaj   +1 more source

Analysis of Key Technologies for New Green Marine Propulsion Systems [PDF]

open access: yesE3S Web of Conferences, 2020
The new green Marine propulsion system, as a new generation of marine propulsion, has advantages of strong mobility, low fuel consumption, low noise, safety and comfort.
Duan Zheng   +3 more
doaj   +1 more source

Hybrid-electric propulsion for automotive and aviation applications [PDF]

open access: yes, 2014
In parallel with the automotive industry, hybrid-electric propulsion is becoming a viable alternative propulsion technology for the aviation sector and reveals potential advantages including fuel savings, lower pollution, and reduced noise emission ...
Friedrich, C, Robertson, PA
core   +1 more source

Design of DC grid system for green intelligent hybrid bulk carrier

open access: yesZhongguo Jianchuan Yanjiu, 2023
ObjectiveAccording to the characteristics of the complex waterways of inland rivers, a DC grid solution based on a multi-energy parallel hybrid green intelligent bulk carrier is proposed.
Li SU
doaj   +1 more source

Safety verification of a fault tolerant reconfigurable autonomous goal-based robotic control system [PDF]

open access: yes, 2007
Fault tolerance and safety verification of control systems are essential for the success of autonomous robotic systems. A control architecture called Mission Data System (MDS), developed at the Jet Propulsion Laboratory, takes a goal-based control ...
Braman, Julia M. B.   +2 more
core   +1 more source

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