WorldCat Identities

Sawka, Wayne N.

Works: 2 works in 13 publications in 1 language and 368 library holdings
Classifications: QE611.5.U6, 551.88
Publication Timeline
Most widely held works by Wayne N Sawka
Raymond quadrangle, Madera and Mariposa Counties, California : analytical data : modal and chemical data and isotopic ages of the plutonic rocks of the Raymond quadrangle by Paul C Bateman( Book )

11 editions published between 1981 and 1982 in English and held by 366 WorldCat member libraries worldwide

Solid State Digital Propulsion Cluster Thrusters for Small Satellites Using High Performance Electrically Controlled Extinguishable Solid Propellants( Book )

2 editions published in 2005 in English and held by 2 WorldCat member libraries worldwide

Electrically controlled extinguishable solid propellants (ESCSP) are capable of multiple ignitions, extinguishments and throttle control by the application of electrical power. Both core and end burning no moving parts ECESP grains/motors to three inches in diameter have now been tested. Ongoing research has led to a newer family of even higher performance ECESP providing up to 10% higher Isp, manufacturing ease, and significantly higher electrical conduction. The high conductivity was not found to be desirable for larger motors; however it is ideal for downward scaling to micro and pico-propulsion applications with a web thickness of less than 0.125 inch. As a solid solution propellant, this ECESP is molecularly uniform, having no granular structure. Because of this homogeneity and workable viscosity it can be directly cast into thin layers or vacuum cast into complex geometries. Both coaxial and grain stacks have been demonstrated. Combining individual propellant coaxial grains and/or grain stacks together form three-dimensional arrays of modular cluster thrusters. Adoption of fabless manufacturing methods and standards from the electronics industry will provide custom, highly reproducible micro-propulsion arrays and clusters at low costs. These stack and cluster thruster designs provide a small footprint saving spacecraft surface area for solar panels and/or experiments. The simplicity of these thrusters will enable their broad use on micro-pico satellites for primary propulsion, ACS and formation flying applications. Larger spacecraft may find uses for ECESP thrusters on extended booms, on-orbit refueling, pneumatic actuators, and gas generators
Audience Level
Audience Level
  Kids General Special  
Audience level: 0.52 (from 0.52 for Raymond qu ... to 0.94 for Solid Stat ...)

English (13)