Solid Fuel VS Liquid fuel

[DarknessEyes]

Whats the difference?

[General Dog Food]

Solid fuel is used in the SRB's (Solid Rocket Boosters). Liquid fuel is used in the other engines (Excluding RCS and the Ion Engine).

I'm not sure if there really is a difference, though. Haven't really bothered to check.

[The_Mell]

Solid fuel is a one way - once activated it burns completly at full thrust.

Liquid fuel engines have throttle, can be regullated and even shut off.
Adding more burn time by adding more fuel tanks is possible, too.

[Gralzeim]

Note: You don't have to use full thrust for solid fuel engines. You can adjust the thrust limiter in the VAB/SPH, though you can't adjust this while in flight. Once lit, solid fuel engines burn till they're empty, at the maximum allowed thrust.

Liquid fuel engines can be throttled and turned off and back on, and can be refuelled.

Usually the main advantage solid fuel engines have is they're typically cheaper and have a higher thrust to weight ratio, making them great for the first stage or two when you need some extra ooph but don't want to go full-on asparagus staging with liquid fuel engines.

[DarknessEyes]

Originally posted by HeimdallW32:

Usually the main advantage solid fuel engines have is they're typically cheaper and have a higher thrust to weight ratio, making them great for the first stage or two when you need some extra ooph but don't want to go full-on asparagus staging with liquid fuel engines.

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