## Hybrid Propellants

Rocket Propellants 1) Liquid Propellants 2) Solid Propellants 3) Hybrid Propellants   Hybrid propellant engines represent an intermediate group between solid and liquid propellant engines. One of the substances is solid, usually the fuel, while the other, usually the oxidizer, is liquid. The … Continue reading

## Solid Propellants

Rocket Propellants 1) Liquid Propellants 2) Solid Propellants 3) Hybrid Propellants   Solid propellant motors are the simplest of all rocket designs. They consist of a casing, usually steel, filled with a mixture of solid compounds (fuel and oxidizer) that burn at … Continue reading

## Liquid Propellants

Rocket Propellants 1) Liquid Propellants 2) Solid Propellants 3) Hybrid Propellants   In a liquid propellant rocket, the fuel and oxidizer are stored in separate tanks, and are fed through a system of pipes, valves, and turbopumps to a combustion chamber where they … Continue reading

## Hyperbolic Departure and Approach

Interplanetary flight:  1) Introduction 2) Heliocentric Transfer Orbit 3) The Gauss Problem 4) Determining Orbital Elements 5) Hyperbolic Departure and Approach 6) Gravitational Assist   Solving the Gauss problem gives us the heliocentric transfer orbit that takes the spacecraft from the sphere of influence of … Continue reading

## Determining Orbital Elements

Interplanetary flight:  1) Introduction 2) Heliocentric Transfer Orbit 3) The Gauss Problem 4) Determining Orbital Elements 5) Hyperbolic Departure and Approach 6) Gravitational Assist   Solving the Gauss problem gives us the position and velocity vectors, r and v, of a spacecraft in a heliocentric-ecliptic orbit. From these … Continue reading

## Gravitational Assist

Interplanetary flight:  1) Introduction 2) Heliocentric Transfer Orbit 3) The Gauss Problem 4) Determining Orbital Elements 5) Hyperbolic Departure and Approach 6) Gravitational Assist   In planning certain types of trajectories of spacecraft within the solar system, engineers rely on a technique called gravitational assist … Continue reading

## The Gauss Problem

Interplanetary flight:  1) Introduction 2) Heliocentric Transfer Orbit 3) The Gauss Problem 4) Determining Orbital Elements 5) Hyperbolic Departure and Approach 6) Gravitational Assist   On New Year’s Day 1801, Giuseppe Piazzi of Italy observed for the first time an object that turned out to … Continue reading

## Heliocentric Transfer Orbit

Interplanetary flight:  1) Introduction 2) Heliocentric Transfer Orbit 3) The Gauss Problem 4) Determining Orbital Elements 5) Hyperbolic Departure and Approach 6) Gravitational Assist   For transfers to most of the planets, we may initially consider that the planetary orbits are both circular and coplanar. … Continue reading

## Interplanetary Flight – Introduction

Interplanetary flight:  1) Introduction 2) Heliocentric Transfer Orbit 3) The Gauss Problem 4) Determining Orbital Elements 5) Hyperbolic Departure and Approach 6) Gravitational Assist   An interplanetary spacecraft spends most of its flight time moving under the gravitational influence of a single body – the … Continue reading