Presenting "Little Hermes"
A proof-of-concept hybrid turbojet engine capable of reaching low Kerbin orbit:

It's low radar profile makes it ideal as a body for smaller reconnaissance vehicles.

With a capable atmospheric velocity in excess of 1000m/s (max speed is top-secret).

Although this self-contained prototype is capable of low Kerbin orbit, it would be ideal as a base for smaller vehicles or as an engine for a larger space-plane.

The "Little Hermes" hybrid jet-engine would be ideally suited for defense contractors, or even for SSTO projects.

Craft file:

The creator is not responsible for performance failures or death or injury resulting from this engine