Initial characterization of an Experimental Referee Broadened-Specification (ERBS) aviation turbine fuel

Characterization data and a hydrocarbon compositional analysis are presented for a research test fuel designated as an experimental referee broadened-specification aviation turbine fuel. This research fuel, which is a special blend of kerosene and hydrotreated catalytic gas oil, is a hypothetical representation of a future fuel should it become necessary to broaden current kerojet specifications. It is used as a reference fuel in research investigations into the effects of fuel property variations on the performance and durability of jet aircraft components, including combustors and fuel systems

Isotope heat source simulator for testing of space power systems

A reliable isotope heat source simulator was designed for use in a Brayton power system. This simulator is composed of an electrically heated tungsten wire which is wound around a boron nitride core and enclosed in a graphite jacket. Simulator testing was performed at the expected operating temperature of the Brayton power system. Endurance testing for 5012 hours was followed by cycling the simulator temperature. The integrity of this simulator was maintained throughout testing. Alumina beads served as a diffusion barrier to prevent interaction between the tungsten heater and boron nitride core. The simulator was designed to maintain a surface temperature of 1311 to 1366 K (1900 to 2000 F) with a power input of approximately 400 watts. The design concept and the materials used in the simulator make possible man different geometries. This flexibility increases its potential use

Apparatus for making a metal slurry product Patent

Apparatus for producing hydrocarbon slurry containing small particles of magnesium for use as jet aircraft fue

Performance of a flight-type laminar radiator with a Brayton power system

A space-type laminar flow radiator was designed and integrated with a 2- to 15-kilowatt Brayton electrical power generating system. The design, fabrication, and testing of this radiator are presented. Test results include performance under steady state and transient conditions. Included in the transient results is performance in a simulated low earth orbit. Results show that the computer design is conservative. Orbital transients show that a further reduction in radiator area over that determined from steady state conditions is possible. Radiator efficiency was always greater than 83 percent

Performance of a Brayton power system with a space type radiator

Test results of an experimental investigation to measure Brayton engine performance while operating at the sink temperatures of a typical low earth orbit are presented. The results indicate that the radiator area was slightly oversized. The steady state and transient responses of the power system to the sink temperatures in orbit were measured. During the orbital operation, the engine did not reach the steady state operation of either sun or shade conditions. The alternator power variation during orbit was + or - 4 percent from its mean value of 9.3 kilowatts

Availability and cost estimate of a high naphthene, modified aviation turbine fuel

Information from an Air Force study was used to determine the potential availability and cost of a modified conventional fuel with a naphthene content which could have a thermal stability near that of JP-7 for high-speed civil transports. Results showed sufficient capacity for a fuel made of a blend of 50 percent naphthenic straight run kerosene and 50 percent hydrocracked product, assuming a near-term requirement of 210,000 BBL per day. Fuel cost would be as low as 62.5 to 64.5 cents per gallon, assuming 20 dollars per barrel for crude

Low cost uniform heat source

Electrically powered heat source was developed for ground simulation of isotope heat-source assembly in Brayton power system. Heat source, which operates on ordinary 110 vac power, consists of tungsten filament heating element wound onto a spirally grooved boron nitride core and inserted in a hollowed-out graphite hexahedron

Analisis Komparasi Pendapatan Asli Daerah di Kabupaten Minahasa Selatan

Undang-Undang No 22 Tahun 1999 dan Undang-Undang No 25 Tahun 1999 yang telah diberlakukan, merupakan titik Balik awal berjalannya Otonomi Daerah. Prinsip utama kedua UU ini adalah agar setiap daerah mampu mengambil keputusan dan bertanggung jawab untuk mengolah sumber daya yang dimiliki sesuai kepentingan dan potensi daerah sendiri, dengan tujuan daerah diberikan kewenangan untuk mengatur urusan pemerintah daerah tanpa campur tangan pemerintah pusat. Metode analisis yang digunakan adalah mengunakan uji beda dua sampel Independent, untuk membandingkan PAD dinas yang masuk urusan Wajib dan Pilihan. Populasi penelitian adalah semua SKPD di Kabupaten Minahasa Selatan Yang memiliki PAD. Sampel yang digunakan berjumlah 6 Dinas/Badan. Hasil penelitian sejak tahun 2008-2011, ternyata PAD dinas yang masuk urusan Wajib lebih tinggi dari pada PAD dinas urusan Pilihan, namun persentase pencapain dari target realisasi masih lebih besar Dinas urusan Pilihan dari pada Dinas urusan Wajib. Kata kunci: target, realisasi, pendapatan asli daera