VOLUNTEERS 1­2 GOALS ­ Teach about thrust, or the air pushing back that causes the straw to move forward. ­ Relate it to how real rockets work by blasting off using thrust from rocket fuel. MATERIALS ­ Balloons (different shapes if possible) ­ Straws ­ Tape ­ Long piece of string (use the silky string that separates easily in the SWE closet) PLAN Explain activity and introduce instructions Test...

JCB • VOLUME 214 • NUMBER 5 • 2016 492 Richard Cheney grew up in a small town in the Cascade Mountains, spending many summers exploring the local creeks and forests. His parents encouraged his early interest in science, taking him to aquariums, letting him set up a chemistry lab in the bathroom, and even allowing some unwise experiments, like making rocket fuel on the stove. When his parents bo...

This paper presents a simplified, tutorial approach to determining the gains of inertial confinement fusion ~ICF! targets, via a basic, zero-dimensional ~‘‘0-D’’!, energy ‘‘bookkeeping’’ of input ~parametrized by ICF drivers’ coupling efficiencies to the target, and subsequent hydrodynamic efficiencies of implosion! versus output ~thermonuclear burn efficiency and target fuel mass!. Physics iss...

Comparison of objects characterized by a multitude of criteria will typically not lead to a linear order, but to a partial order. However, often a linear order is desirable or even required. The present paper presents an improved – extended – approximate local partial order model to estimate a weak or linear order based on averaged ranks of the studied objects originally being partially ordered...

that disrupts thyroid function by inhibiting the uptake of iodide, is best known for its use in rocket fuel but also occurs naturally in the environment. Since the beginning of the last century, Chilean nitrate fertilizers that contained naturally produced perchlorate were applied to U.S. agricultural fields. Today, perchlorate hot spots occur, some of which seem to extend farther than what is ...

The use of correlation-gas chromatography to measure the vaporization enthalpy {∆l Hm(298.15 K)} of complex fuels is demonstrated using RP-1, JP-7, and JP-8, which are all rocket and jet fuels. Vaporization enthalpies of 308, 341, and 441 kJ/kg have been obtained assuming average compositions of C12H23.4, C12H25, and C11H21, respectively. The H/C ratio in these fuels has been measured by 1H NMR...

SpaceX's successful development of reusable rockets and the realization low-cost operations have significantly impacted space industry, institutions, companies. Price competitiveness has become a hot topic for launch vehicle development. A hydrogen-fueled rocket engine can be its solution. The developed countries are attempting to improve performance reliability engines using hydrogen-fuel. Thi...

This paper discusses a set of experiences I had in developing ROCKET, an early application generator in the area of rocket flight mechanics at the Rand Corporation. It begins by describing a precursor system I worked on at General Dynamics. It also covers some experiences with the interactive Graphic ROCKET followon, and POGO, an early GUI builder. It concludes by relating these to the recent M...

Hybrid combustion technology has recently been employed in the sounding rocket developments to support the science experiments of academic applications and the establishment of a viable flight test platform for space components development. Due to its safety nature in material handling and combustion processes, hybrid rockets are suitable for university and research institute environments for a...