The use of electrical discharge for ignition and control of combustion of solid propellants

As the first step of the study of the combustion control of solid propellants by electrical discharges, the effects of an arc discharge, which flows along the burning surface, on the burning rate and on the increase of enthalpy of the combustion product were investigated. For specially devised composite propellants, which are composed of Al and Teflon powders, it was shown that the combination can be controlled by an arc discharge; the combustion continues when the arc discharge is applied and is interrupted when the arc discharge breaks. In the present investigation, it was also shown that an arc discharge coupled with a high-frequency electrical discharge has potential as an effective ignition method for solid propellants. For the application of this type of combustion control to an ignitor for a solid propellant rocket motor or to a control rocket motor, this method lacks flexibility in the configuration scale and needs relatively high electric power at the present stage

Tokyo University and the War

Tachibana Takashi analyzes the impact of World War II on Tokyo University and Tokyo University\u27s impact on the war: attacks from outside, faculty politics and purges, institutional expansion, the sacrifice of liberal arts students to the war machine, and heroic dissenting professors who tried in vain to bring the war to an early end. Translated and edited by Richard H. Minearhttps://scholarworks.umass.edu/history_oapubs/1000/thumbnail.jp