I've heard of planning to use alcohol - ethyl alcohol - as fuel for Kliper spacecraft in RKK Energiya. Reminding that Soyuz capsule still uses hydrogen peroxide

I've heard of planning to use alcohol - ethyl alcohol - as fuel for Kliper spacecraft in RKK Energiya. Reminding that Soyuz capsule still uses hydrogen peroxide as its RCS fuel. So alcohol isn't that much of "non-real" fuel.