Results 1 to 10 of about 17,309 (192)

Neural Networks for Estimating Attitude, Line of Sight, and GNSS Ambiguity Through Onboard Sensor Fusion [PDF]

open access: yesSensors
Accurate estimation of attitude, line of sight (LOS), and carrier-phase ambiguity is essential for the performance of Guidance, Navigation, and Control (GNC) systems operating under highly dynamic and uncertain conditions.
Raul de Celis, Luis Cadarso
doaj   +2 more sources

Review on the regression rate-improvement techniques and mechanical performance of hybrid rocket fuels

open access: yesFirePhysChem, 2021
Human spaceflight, space tourism, and the launch of microsatellites are all expected to grow in the future. In fact, with the recent increase of the satellite market, almost 1000 smallsats per year are foreseen to be launched over the next decade. Hybrid
Yash Pal   +4 more
doaj   +1 more source

Bridging the Technology Gap: Strategies for Hybrid Rocket Engines

open access: yesAerospace, 2023
Hybrid rocket propulsion, first demonstrated by the Russian GIRD-09 rocket in 1933, combines liquid oxidizer and solid fuel for thrust generation. Despite numerous advantages, such as enhanced safety, controllability, and potential environmental benefits,
Christopher Glaser   +2 more
doaj   +1 more source

A short review of challenges and prospects of boron-laden solid fuels for ramjet applications

open access: yesFirePhysChem, 2023
This short review article explores the advancement, challenges, and prospects of boron-laden solid fuel for ramjet. The energetic aspect of boron combustion is well known, but the complications associated with its efficient combustion persist and must be
Saugata Mandal   +3 more
doaj   +1 more source

Experimental investigation of erosion rate of insulation materials using hybrid rockets

open access: yesFirePhysChem, 2021
Thermal insulation is essential to protect the exposed surface from high-temperature and high heat flux situations. The selection of suitable insulation materials plays a crucial role in determining rocket performance.
Phaninder Reddy Vaka   +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

Review of Alternative Sustainable Fuels for Hybrid Rocket Propulsion

open access: yesAerospace, 2023
Hybrid rockets using specific oxidizer–fuel combinations are considered a green alternative to current propulsion systems, as they do not release very toxic or polluting exhausts, but only much less harmful substances such as carbon monoxide/dioxide and ...
Francesco Barato
doaj   +1 more source

Hybrid rocket propulsion technology for space transportation revisited - propellant solutions and challenges

open access: yesFirePhysChem, 2021
This paper presents the status of developments worldwide regarding use of hybrid rocket motors for space transportation. Historical roots are presented and reasons for revisiting hybrid technology after a few decades of limited interest are examined ...
Adam Okninski   +3 more
doaj   +1 more source

Design and Test of a Student Hybrid Rocket Engine with an External Carbon Fiber Composite Structure

open access: yesAerospace, 2020
The development of hybrid rockets offers excellent opportunities for the practical education of students at universities due to the high safety and relatively low complexity of the rocket propulsion system.
Francesca Heeg   +3 more
doaj   +1 more source

Numerical Simulations of the Internal Ballistics of Paraffin–Oxygen Hybrid Rockets at Different Scales

open access: yesAerospace, 2021
Hybrid rockets are considered a promising future propulsion alternative for specific applications to solid or liquid rockets. In order to raise their technology readiness level, it is important to perform predictive numerical simulations of their ...
Mario Tindaro Migliorino   +2 more
doaj   +1 more source

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