Not only the Federation had to cut costs, the Klingon Empire had to do it too due to the enduring peace made by that p'tach Kirk.
So I present you the IKV Clueless. Based on the glorious D7, this stock parts d7 can't even go to space but it has the maneuverability of the big one and it scares any bird it encounters, even human females with their ugly flat foreheads.
It's weapons are ... eh ... style, intimidating red lights and striping, thunderous noise while flying and abrupt end of flight.
Made with the best materials the now conquered planet Kerbin had to offer! Only 73 parts!
Download link: https://kerbalx.com/Azimech/77I---IKV-Clueless