Hypergolic propellant | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-17

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Hypergolic_propellant


00:01:03 1 History
00:06:29 2 Characteristics
00:06:39 2.1 Advantages
00:08:54 2.2 Disadvantages
00:09:40 3 Hypergolic combinations
00:09:51 3.1 Common
00:11:57 3.2 Less common and obsolete
00:14:07 4 Related technology



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SUMMARY
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A hypergolic propellant combination used in a rocket engine is one whose components spontaneously ignite when they come into contact with each other.
The two propellant components usually consist of a fuel and an oxidizer. The main advantages of hypergolic propellants are that they can be stored as liquids at room temperature and that engines which are powered by them are easy to ignite reliably and repeatedly. Although commonly used, hypergolic propellants are difficult to handle due to their extreme toxicity and/or corrosiveness.
In contemporary usage, the terms "hypergol" or "hypergolic propellant" usually mean the most common such propellant combination, dinitrogen tetroxide plus hydrazine and/or its relatives monomethylhydrazine and unsymmetrical dimethylhydrazine.