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- Gunpowder (1148 bytes)
2: '''Gunpowder''' is a substance which burns very rapidly and i...
4: ...is now primarily only used for [[firework]]s, [[model rocket]] engines and in reproduction weapons.
5: ... end of the [[19th Century]] and is used in all modern [[gun]]s.
7: ...ing rock or [[fortification]]s. However, black powder was, for a few centuries, the only blasting agen...
9: ...t]], modern references usually imply smokeless powder when referring to the propellant in [[small arms... - Jet engine (22370 bytes)
1: ... the front of the engine (left of photo) prevents debris - or people - from being pulled into the engi...
4: ...ally ignited by flame in the eddy of a [[flame holder]], and burned as an atomized mixture. The [[comb...
6: ...(especially [[supersonic]] speeds) and high altitudes. On slower aircraft and those required to fly sh...
10: ...of peripheral fitted is dependent on the aircraft design application.
15: ...''', or simply '''jet''') engine, as subsequently developed, would become almost as revolutionary to a...
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