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[1.12.x] Mk2 Expansion v1.9.1 [update 10/5/21]


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7 minutes ago, Pauver said:

I'm having trouble with the Mattock engine. Whenever I'm flying it sometimes flames out (the prop. requirement reaches below 65%) and I don't know how to fix it. Can anyone help me?

How many air intakes do you have and what type? Only shock cone intakes work well at high mach numbers.

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1 minute ago, Manul said:

How many air intakes do you have and what type? Only shock cone intakes work well at high mach numbers.

radial pump intakes. That might be the problem

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8 minutes ago, Pauver said:

radial pump intakes. That might be the problem

Of course. They are tiny and they choke above Mach4

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  • 3 weeks later...

Hey, am I misunderstanding how the "Sledgehammer" engine from this mod works? It seems to drain a lot of oxidizer, and actually drains significantly more oxidizer in airbreathing mode, even with fully satisfied intake air. Is it supposed to do this? Am I stupid?

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Posted (edited)
2 hours ago, pingin said:

Hey, am I misunderstanding how the "Sledgehammer" engine from this mod works? It seems to drain a lot of oxidizer, and actually drains significantly more oxidizer in airbreathing mode, even with fully satisfied intake air. Is it supposed to do this? Am I stupid?

This is how air augmented rocket works.  It doesn't have a mighty compressor and precooler to compress air until it starts to liquefy and push it into  the combustion chamber of a rocket engine, replacing the source of liquid oxygen. So it just uses the exhaust of a rocket engine to heat up some intake air and make it expand in the nozzle for extra thrust.

https://en.wikipedia.org/wiki/Air-augmented_rocket here is the difference between liquid air cycle rocket and an air augmented rocket.

Do you know what a bypass ratio of a jet engine is? It means that some compressed air from the compressor doesn't go into the combustion chamber, it goes directly to the nozzle to create thrust. Air augmented rocket has a 100% bypass ratio, it's just a rocket engine in a long tube  :D

Edited by Manul
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