Talk:Monopropellant rocket

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Reading the page I had the doubt whether these monopropellants burn themselves without being ignited (by a fire, spark, laser, etc). This should be stated clearly

For instance in the paragraphs below there could be a reference to the igniter.

Most monopropellant rocket systems consist of a fuel tank, usually a titanium or aluminum sphere, with a nitryl rubber bladder filled with the fuel. The sphere is then pressurized with helium, which pushes it out to the motors. A pipe leads from the bladder to a poppet valve, and then to the reaction chamber of the rocket motor. Usually, there's not just one motor, but two to twelve, each with its own little valve.

The rocket is fired when the computer sends direct current through a small electromagnet that opens the poppet valve. The firing is often very brief, a few thousandths of a second, and usually sounds like a pebble thrown against a metal trash can. If the motor stays on for long, it makes a piercing hiss. —Preceding unsigned comment added by 57.66.41.132 (talk • contribs)

There is no igniter with hydrazine. Shell 405 is a spontaneous catalyst, that is, hydrazine decomposes (combusts) on contact with the catalyst. The reaction is highly exothermic and produces a 1800 deg. F gas that is a mixture of nitrogen, hydrogen and ammonia.``` —Preceding unsigned comment added by Cevaughan (talk • contribs)

[edit] Citations?

This article needs some citations. Titanium Dragon (talk) 02:27, 8 February 2008 (UTC)