The Wright class of mid-range patrol vessel was designed in the early years of the United Nations of Earth (circa 2130). These vessels, constructed in Earth orbit and crewed by up to twenty personnel, could effectively operate just past Jupiter when based from Earth. Admittedly, before the synthesis of Handwavium this journey took almost a year.
The Wrights spent most of their time in high orbit around the planets and moons they were stationed at - more of a small, moveable space station than the warships of the 23rd Century. Conceived after the Martian Riot crisis, each was armed with two coil guns for orbital targets and two large Kinetic Impact Beams (colloquially known as Rods from God) to bring a swift end to any unrest. Generally the thought of a massive beam of uranium dropping out of the sky is enough to keep colonists in their place.
Command Module and flight control systems housed in the front, along with two long range sensor/comms packages. (Redundancy is good a half billion miles from home) The command module is designed for emergency detatchment and atmospheric re-entry, just in case. The command module is connected via a long corridor (passing through the weapon hub) to the rotating crew bays. These two modules spin to simulate gravity akin to that of Earth's, and contain living, eating, and social quarters. The whole ship is powered by a hybrid rocket engine.