# Titan 2100 > Titan 2100 is a speculative visit to the Saturn system in the year 2100: a fusion colony ship, the Saturn Gateway, the settlement of Kraken Shore on Titan's methane sea, and a research station on Enceladus. This site is the engineering primer behind a guided, real-time 3D tour. The physics is real and every number carries a basis tag; the 2100 history is a speculative design. ## Pages - [Building for 94 K and 1.5 bar](https://titan.davidveksler.com/engineering/building-cold/): Titan's air presses on Kraken Shore from outside, so the shells work in compression like masonry. Why vaults, thermal breaks, thick insulation and reactor heat make a warm room at 94 K. - [Electric propulsion](https://titan.davidveksler.com/engineering/electric-propulsion/): The nuclear-electric tug spirals from Titan to Enceladus in 120 days on imported xenon. Why 85 newtons and a 24.5 km/s exhaust beat chemistry on a leg that needs 7.05 km/s. - [Enceladus plumes and the ocean](https://titan.davidveksler.com/engineering/enceladus/): Enceladus is a 252 km-radius ice moon with a global ocean under its shell. Its south pole sprays that ocean into space, and a research station samples the plumes with a drone. - [Fusion propulsion and helium-3](https://titan.davidveksler.com/engineering/fusion-propulsion/): The Long Passage crosses to Saturn on deuterium and helium-3 fusion. How 371 kg of fuel moves a 10,000-tonne ship, why magnets can steer the products, and where the heat goes. - [Getting around the Saturn system](https://titan.davidveksler.com/engineering/getting-around/): Five legs, five engines, from the Long Passage to the Enceladus drone. How the Saturn network is laid out, why the Gateway sits at 750,000 km, and why each leg gets its own vehicle. - [Kraken Mare and Titan's seas](https://titan.davidveksler.com/engineering/kraken-mare/): Kraken Mare covers at least 400,000 km² of liquid methane and ethane. Where Cassini measured its depth, why Kraken Shore sits at the mouth of Moray Sinus, and what the barge carries. - [Methalox from Titan](https://titan.davidveksler.com/engineering/methalox-from-titan/): The Titan ascent vehicle burns methane from Kraken Mare with oxygen split from water ice. Why both propellants are local, why storage is easy at 94 K, and what 3 km/s of delta-v buys. - [Nuclear-thermal rockets](https://titan.davidveksler.com/engineering/nuclear-thermal/): The Gateway shuttle heats Titan methane in a fission reactor and nothing burns. Why light propellant is fast propellant, why methane still wins at Saturn, and the Meridian heritage. - [Planetary protection](https://titan.davidveksler.com/engineering/planetary-protection/): Article IX of the Outer Space Treaty and the COSPAR policy tell explorers to avoid contaminating other worlds. How the Enceladus station keeps to them with robotic sampling and no ocean extraction. - [Reactors and heat on Titan](https://titan.davidveksler.com/engineering/reactors-heat/): Sunlight at Saturn is about 1% of Earth's before the haze takes its share, so Kraken Shore runs on two small fission reactors. Why waste heat is a resource at 94 K, not a burden. - [Saturn's rings](https://titan.davidveksler.com/engineering/saturn-rings/): On 1 July 2100 the Sun stands 13.35 degrees above the ring plane and lights the north face. Ring radii, the 2098 crossing, and how the rings look from the Gateway and from Enceladus. - [Spin gravity and counter-rotation](https://titan.davidveksler.com/engineering/spin-gravity/): The Long Passage makes 0.56 g by spinning two drums of 56 m radius at 3 rpm, in opposite directions. How spin becomes weight, why the pair cancels, and what Titan's 0.14 g does instead. - [Titan's atmosphere and flight](https://titan.davidveksler.com/engineering/titan-flight/): Titan's air is 1.467 bar of cold nitrogen, 4.4 times denser than Earth's, under 0.138 g. Why an 8-tonne rotorcraft hovers on 39.4 kW, one forty-first of Earth's power, and how Dragonfly fits. - [Water, oxygen and electrolysis](https://titan.davidveksler.com/engineering/water-oxygen/): On Titan water ice is the bedrock. Kraken Shore mines it, melts it and splits it into oxygen for air and rockets and hydrogen for the fusion transports. How much ice is easy to mine is open. - [Engineering](https://titan.davidveksler.com/engineering/): Plain-language engineering explainers behind the Saturn tour: fusion, nuclear-thermal and electric propulsion, spin gravity, building at 94 K, Titan's seas, reactors, water and planetary protection. - [The guided journey](https://titan.davidveksler.com/journey/): Nine chapters, about thirteen minutes, from the fusion colony ship Long Passage to the plumes of Enceladus. Each chapter links into the 3D tour and to the engineering behind it. - [The fleet](https://titan.davidveksler.com/fleet/): Eight settler vehicles from the 650 m fusion colony ship to a 2.5 m Enceladus drone, with the numbers each one is built from and the engine that flies it. - [About Titan 2100](https://titan.davidveksler.com/about/): Titan 2100 is a speculative design built as a real-time 3D tour. The physics is real, every number carries a basis tag, and the 2100 history is fiction. Credits, status and what is styled. - [Titan 2100](https://titan.davidveksler.com/): A guided tour of the Saturn system in 2100: a fusion colony ship, the Gateway, the Kraken Shore settlement on Titan's methane sea and a station on Enceladus, with the engineering behind each. ## Optional - [Full text of every engineering explainer](https://titan.davidveksler.com/llms-full.txt)