Ares
Titan
The largest vehicle ever flown, and the only one built to move a town. Fully reusable. Fully integrated. Flying every three days from the Texas Gulf Coast.
Built at the scale
of a migration.
Two stages, both reusable. The Titan Booster returns to the pad it launched from. The Titan Ship carries its passengers to Mars and lands on its own engines.
Ares Titan Block 3 · side elevation · not to scale verticallyDrawing AF-ENG-0031 rev. K
| Length | 91.0 m |
|---|---|
| Engines | 61 × Hephaestus HX-3 (sea level) |
| Propellant | 4,650 t LOX / CH₄ |
| Thrust at liftoff | 224 MN |
| Recovery | Return to launch site, tower catch |
| Reuse target | 100 flights · current fleet leader: 19 |
| Length | 71.8 m |
|---|---|
| Engines | 3 × HX-3 sea level · 6 × HX-3V vacuum |
| Pressurized volume | 3,900 m³ |
| Crew | 120 colonists · Block 3 |
| Cargo to Mars surface | 140 t incl. resupply module |
| Landing | Propulsive, nose-thruster assisted |
| Earth–Mars transit | 176–212 days |
|---|---|
| Orbital refills | 5 tanker sorties per ship |
| Mars entry velocity | 7.4 km/s |
| Transit gravity | 0.38 g · spin habitat |
| Pad turnaround | < 6 hours |
| Unit cost | Not disclosed |
Hephaestus HX-3
A full-flow staged combustion methalox engine, built at Talos Works in Brownsville at a rate of eleven engines a day. Methane and oxygen because Mars has both: every Titan that lands at Promethea can be refueled from the ground beneath it.
HX-3 runs both turbopumps fuel-rich and oxidizer-rich, so neither preburner ever sees the temperatures that wear engines out. The result is an engine designed to fly a hundred times between overhauls.
| Cycle | Full-flow staged combustion |
|---|---|
| Propellants | Liquid methane · liquid oxygen |
| Chamber pressure | 330 bar |
| Thrust, sea level | 3.67 MN · 825,000 lbf |
| Specific impulse | 334 s SL · 382 s vac (HX-3V) |
| Mixture ratio | 3.6 : 1 O/F |
| Throttle range | 40–100% |
| Engine mass | 1,720 kg |
Gravity, all the way to Mars.
Six months in free fall costs bone, muscle and eyesight. So the Titan Ship spins. Its habitat drum rotates at 6.7 rpm around a 7.5-meter radius, delivering a steady 0.38 g, the gravity colonists will live in when they arrive.
The drum counter-rotates against a flywheel ring, so the ship itself never tumbles. Inside it is over fifty feet across: two decks of private sleep pods, a galley, a gym, classrooms, and a window wall that keeps Earth in view until it becomes a star.
Below the threshold where most people feel rotation at all.
Bodies arrive already adapted to the planet they'll live on.
Each with a headrest display wired to the ship's external cameras.
Lessons we never repeat.
Landing a sixty-meter ship on Mars is like balancing a broomstick on a marble, in an atmosphere one percent as thick as Earth's that changes its mind during dust season.
After Cohort 1, we added a nose attitude thruster that gives the ship an independent lever at the top of the vehicle during the flip and final descent, and we adopted the strictest landing weather criteria in the industry. Every Titan now waits in orbit until the local dust index and atmospheric density are inside tested limits. Since those changes, every crewed landing has been nominal.
The 84Texas to Utopia Planitia.
A Window 3 crewed mission, from clamp release to touchdown.
- T−0Liftoff
61 engines, 224 meganewtons. Clamps release at full thrust.
- T+1:04Max Q
Peak aerodynamic pressure. The ride gets loud, then smooth.
- T+2:41Hot staging
Ship ignites before separation. Crews feel the kick at 2.5 g.
- T+6:50Booster catch
The booster returns to Pad 39-T and is caught by the tower.
- T+8:32Orbit
Main engine cutoff. Free fall, briefly, until the drum spins up.
- Day 1–9Refill
Five tanker sorties top up the ship in low Earth orbit.
- Day 10Trans-Mars burn
A seven-minute burn sends the ship toward Mars.
- Day 196Entry & landing
Aerobraking, flip, and a powered landing at Promethea.
Frontier Point Launch Complex
Four pads on the Texas Gulf Coast, a tank farm the size of a small town, and the fastest pad turnaround in the world. Between Window 2 and Window 3, our launch team cut turnaround from thirty-one hours to under six.
Most of that time came from the propellant system. Legacy procedures held each vehicle for a forty-minute thermal conditioning loop after fill. Our propellant software now compensates for stratification in real time, so the hold is no longer required.
Talos T4
The tireless hands of the frontier. Talos units arrive on the first uncrewed Titans, assemble the city before anyone lands, and maintain it for as long as people live there.
Amine and zeolite bed cleaning, CO₂ unit rebuilds and LiOH canister swaps, on a fixed, published schedule so every zone knows exactly when service happens.
Talos crews unpack, place and seal pressurized modules. A full residential zone goes up in nine sols.
Every Titan carries a resupply module. Talos units unload it, sort it and shelve it before the crew is out of their pods.
When a structure or site is retired, Talos units prepare it for full reclamation, returning the regolith to a clean, natural state for future use.
| Mass | 142 kg |
|---|---|
| Payload | 60 kg deck · 25 kg arm |
| Endurance | 30 h · inductive dock |
| Operating range | −95 °C to +40 °C |
| Mobility | Quadruped · 2.4 m/s · climbs 45° |
| Autonomy | Full · fleet-coordinated |
| Fleet on Mars | 412 units |
Spontaneous Reconfiguration (n.)
An unscheduled transition of a test vehicle into its component parts. Six occurred during the Titan orbital test campaign between 2021 and 2024. Every one produced flight data we never had to collect twice. In rocketry, if you can't stomach a few explosions, you don't belong in this business.