The Goose SSTO

[Runescope]

I don't usually use the Mk2 to Mk3 adapter, except when mounting them on the side for extra fuel and air intake mounts. But I thought of this and had to see if it worked. It did! And better than I could have hoped. I got it into an 80km orbit on the first try! 20 degree tilt most of the way until my air-breathing engines started to fail, then kick in the rockets. I didn't start lowering my prograde to 10 degrees until my time to apoapsis was over a minute. I'm not sure of the DV leftover, because both MechJeb and Kerbal Engineer said there wasn't any at all, but I'm guessing around 2000m/s, just from how much fuel was left.

Beauty Shot:

Side:

Top:

3D:

The Goose by Runescope on Sketchfab