The paper presents a useful engineering model for the design of preliminary hybrid rocket engines. This involves experimentally obtained equation regarding speed burning interface between solid fuel and gaseous phase, called regression rate. rate characterizes mass additionally oxidizer through imposed ratio these rates during combustion. is applied to combustion using pure HTPB oxygen was deve...

One of the main challenges for sustained flight of current aerial micro robots is the low energy density available from common power sources. In this paper we propose solid rocket fuel powered micro thrusters as a high energy density actuation method for aerial micro robots. In a multi stage configuration these thrusters can be used for intermittent flight which can decrease the energetic cost ...

A comprehensive numerical analysis was conducted to study the internal flow development in an integrated rocket-ramjet (IRR) propulsion system. The study consists of two parts: transition from the rocket booster to the ramjet sustainer and combustion dynamics during ramjet operation. The physical model of concern includes the entire IRR flow path, extending from the leading edge of the inlet ce...

Hybrid rocket engines suffer from the restricted mechanical properties and low regression rates of current polymeric fuel grains. We propose a three-dimensional printed aluminium (Al) nested composite grain with millimetre-scale lattice pores (referred to as Al-L). In this study, breathable Al blades micrometer-scale interconnected (Al-B) combining (Al-B&L) are designed. The formation mechanism...

This article explores the impact of the professional culture of rocket engineering in Stalin’s Soviet Union on the engineering and organizational practices of the space program during the Khrushchev era. The Stalinist legacy and the dual military / civilian character of rocket engineers’ work profoundly affected the identity of this elite part of Soviet technical intelligentsia. Focusing on suc...

In this work, we assess the impact of stepped hybrid rocket solid fuel grains on performance engine. The influence Forward Facing Steps (FFS) and Backward (BFS) regression rate is analysed two different cylindrical motors one slab burner with optical access. Accessible post-processing allows to quantify local profiles induced by steps for motors. For burner, novel image processing approaches en...

Februar y 20 09 PA T RA W LI N G S SA IC A lone amid the cosmic blackness, NASA’s Dawn space probe speeds beyond the orbit of Mars toward the asteroid belt. Launched to search for insights into the birth of the solar system, the robotic spacecraft is on its way to study the asteroids Vesta and Ceres, two of the largest remnants of the planetary embryos that collided and combined some 4.57 billi...

Abstract The concept of aerospace system based on air launch from subsonic twin-fuselage aircraft and the rocket into orbit is investigated. scheme trajectory providing a return to starting point both carrier first stage with liquid-fuel motors proposed. It was shown that use as launching platform increases payload mass by 1.2% segment MTOW compared autonomous ground take-off. comparative analy...