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8 votes

Rocket engine with lowest Isp to reach orbit

The only French orbital rocket ever flown was the Diamant. In the first configuration (Diamant A), the first stage only had, according to Wikipedia and a document produced by the engine manufacturer, ...
Xx_DrkLeo_xX's user avatar
3 votes

Why should nozzles be perfectly expanded?

An engine's thrust is transmitted to the rocket via the pressure that the exhaust exerts on the interior surface of the nozzle. Note that this pressure is not uniform: it is very high where the nozzle ...
Charles Staats's user avatar

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