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Posted by: Terraformer - Thu Oct 12, 2017 8:30 pm
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Author:  Terraformer [ Thu Oct 12, 2017 8:30 pm ]
Post subject:  Ramjet

Well, an airship has a very large frontal area to make up for the thin air at that altitude, so...

Ramjets top out at around 2km/s, so it's not going to get you to orbit, but perhaps it could be useful as a reusable first stage? Cutting 2-3km/s off the required delta-V makes getting into orbit so much easier, so a rockoon could get you the rest of the way.

Author:  Rick Maschek [ Sun Nov 05, 2017 6:20 am ]
Post subject:  Re: Ramjet

We have a pending project for a combo solid rocket transition to ramjet first stage to 80-90,000' with a solid second stage to 100 km.
Orbital would follow if the suborbital proved viable.

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