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Other places Turbo Jets work other than Laythe?


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Ok I know Eve is a no go for turbo jets, but what about Duna? I swear I have seen it done, but for the life of me I cannot remember now, or it could be the fact that I am just tired making me question it.

Edited by Liowen
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Just laythe and kerbin, off the top of my head.

EDIT: Yup, according to the wiki..

  • Cannot be used outside of an atmosphere that contains oxygen. In current version, it means they only function on Kerbin and Laythe.

Source: in "Disadvantages": http://wiki.kerbalspaceprogram.com/wiki/Jet_engines

Yeah I dunno why I thought it worked on Duna....derpity derp on me LOL :sticktongue:. Thanks.....back to the drawing board I guess.

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You may have seen someone using parts that store Intake Air. The stock intakes hold a tiny bit, not really enough to be useful. Firespitter has a bottle that can store a lot more, and other mod parts might do it too.

With the stock engines it's rather cheaty, since running on bottled air they'd be a 2000 Isp rocket engine.

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It's a 1200 Isp engine used as a rocket, which sounds great, except for two details.

First, tank mass. The Tnn series of tanks, along with the Rockomax tanks, have a fuel:dry ratio of 8:1 (for every kg in tank mass, they can hold 8kg in fuel). The best stock air container, the radial air scoop, can only hold a 0.5:1 ratio (10kg of tank mass, 5 kg of fuel) -- and you're burning almost all air, so that's about the ratio you achieve overall (it's 0.53:1 when you count the liquidfuel). That right there kills you.

Second, jets' thrust depends on speed, whereas fuel flow doesn't. So while they claim a 1200 Isp, they only achieve that at 1,000 m/s speed; at other speeds they have lower Isp -- at 2 km/s you have just 600 Isp, less than an LV-N. At 2400 m/s or more you have zero thrust, worse than an ant engine.

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