نتایج جستجو برای: propellant saving
تعداد نتایج: 36016 فیلتر نتایج به سال:
In this article aging behavior of composite solid propellant was investigated by determining its mechanical properties at elevated temperatures. For this purpose, three HTPB samples with different microstructures were selected and composite solid propellants were prepared based on them keeping similar other components and aging was studied by accelerated method. Mechanical properties were meas...
Owing to the prime importance of ammonium dinitramide (ADN) as an oxidizer in solid propellants, its synthesis has received a great amount of interest. There have been several new and innovative synthesis routes developed by researcher’s worldwide. Liquid-fuel rockets consist of a fuel and oxygen (or other oxidizer) in liquid state. These fractals are already being combined together or combined...
BACKGROUND Current pressurised metered dose asthma inhaler (pMDI) propellants are not inert pharmacologically as were previous chlorofluorocarbons, have smooth muscle relaxant' partial pressure effects in the lungs and inhaled hydrofluoroalkane 134a (norflurane) has anaesthetic effects. Volumes of propellant gas per actuation have never been measured. METHODS In-vitro studies measured gas vol...
Landing site selection is a compromise between safety concerns associated with the site’s terrain and scientific interest. Therefore, technologies enabling pinpoint landing (sub-100 m accuracies) on the surface of Mars are of interest to increase the number of accessible sites for in-situ research as well as allow placement of vehicles nearby prepositioned assets. A survey of various guidance, ...
Live-fire training exercises can result in particulate propellant contamination on military training ranges and can potentially contaminate ground water. This study was conducted to evaluate dissolution of the 2,4-dinitrotoluene (2,4-DNT) and 2,6-dinitrotoluene (2,6-DNT) from the propellant formulation, M1 (87.6% nitrocellulose, 7.3% 2,4-DNT, 0.57% 2,6-DNT, 1.06% diphenylamine, 3.48% dibutyl ph...
In order to preserve structure and also achieve the desired thrust rocket motor, engine Case temperature should be prevented increase excess.This operation the can be done by Insulation. EPDM rubber because of advantages such as low specific weight, improve aging properties, as long as thermal insulation for solid propellant motors case bond Introduced and its properties are investigated in thi...
This paper presents a dynamic model of the interior ballistics of an experimental liquid propellant powered rifle. The liquid propellant powered rifle described utilizes a mixture of hydroxyl ammonium nitrate and hydrocarbon fuel to replace gunpowder typically used in such firearms. The motivation for such a development is to discard the need for a shell casing whereby carrying only propellant ...
Pyrogen Igniter (PI) is a mission critical component used for igniting large rocket motors. PI is made up of propellant grain cast into a Synthetic Resin Bonded Paper (SRBP) tube, which in turn bonded inside Glass Epoxy (GE) casing. The variations in processing of PI may result in non-uniformity in thickness of its constituents and defects at interfaces that can affect performance of PI. X-ray ...
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