This paper will discuss Air Force Research Laboratory (AFRL) Propulsion Directorate’s theoretical and computational results regarding trajectory simulations, qualitative analyses and parametric studies of a 25-cm focal diameter Laser Ramjet (X-25LR) using Optimal Trajectories by Implicit Simulation (OTIS). OTIS has been used to produce an optimized trajectory simulation of a laser ramjet’s flig...

QSAR/QSTR modelling constitutes an attractive approach to preliminary assessment of the impact on environmental health by a primary pollutant and the suite of transformation products that may be persistent in and toxic to the environment. The present paper studies the impact on environmental health by residuals of the rocket fuel 1,1-dimethyl hydrazine (heptyl) and its transformation products. ...

The purpose of this project is to develop a volcanic plume prediction model for volcanoes located in the Cook Inlet area, Alaska. Knowing where the ash plume is and predicting where it will go are important for public health and safety, as well as for flight operations and mitigating economic damage. For near-real-time plume prediction, acquisition of upper-air wind data is the essential part o...

The goal of this paper is to demonstrate that inductive progrwn synthesis can be applied to learning macrooperators from planning experience. We define macros as recursive program schemes (RPSs). An RPS represents the complete subgoal structure of a given problem domain with arbitrary complexity (e. g., rocket transportation problem with n objects), that is, it represents domain specific contro...

This report presents integrity monitoring and integration methods for an Inertial Measurement Unit (imu) and a gps receiver. The methods are applied to data from a Maxus sounding rocket used for microgravity research. It is crucial to determine the rocket position during launch to ensure a safe landing location. Today, the navigation relies on imu integration only. Involving a gps receiver enha...

Old BS 1619 2 ml glass insulin syringe (U20 insulin) + 26 gauge, 0-5 inch needle 1-26 (U20), (Everett) 0-063 2-52 (U40) New BS 1619 1 ml glass insulin syringe (UIOO insulin) + 26 gauge, 0-5 inch needle (Rand Rocket) 0-051 5 1 (UIOO) New BS 1619 0 5 ml glass insulin syringe (UI00 insulin) + 26 gauge, 0-5 inch needle (Rand Rocket) 0-05 5 (U100) BD Plastipak 1 ml plastic disposable syringe (U100 i...

The interaction of a jet from a 3000-N-class thruster positioned on the side of a small rocket, with the rareŽ ed atmosphere at 100 and 80 km, is studied numerically. The direct simulation Monte Carlo method was applied to model the three-dimensional jet-atmosphere interaction. Chemical reactions between freestream and plume species were included in the simulations. A two-stage numerical strate...

Low thermal conductivity and high thermal stability are desirable for the materials due to their characteristic roles in ablation resistance applications (e.g., reentry parts and renewable rocket nozzles) [1]. Ablation is defined as an erosive phenomenon with a removal of material by a combination of thermomechanical, thermochemical and thermophysical factors due to the high temperature, pressu...

RPA (Rocket Propulsion Analysis) is a design tool for the performance prediction of the liquidpropellant rocket engines. RPA is written in Java and can be used under any operating system that has installed Java Runtime Environment (e.g. Mac OS ® X, Sun SolarisTM, MS WindowsTM, any Linux etc). The tool can be used either as a standalone GUI application or as an object-oriented library. This docu...