SpaceX Dragon spacecraft facts
From SpaceX press kit
Draco Thrusters: Eighteen Draco thrusters used for orbital maneuvering and attitude control (providing system redundancy). Powered by nitrogen tetroxide / monomethylhydrazine (NTO/MMH) storable propellants; 90 lbf (400 N) thrust used for on-orbit maneuvering, de-orbit burns, and re-entry attitude.
Power: Two solar array wings on trunk (8 panels total).
Avionics: Two-fault tolerant avionics system with extensive heritage.
Communications: Communications between Dragon and the ISS are provided by COTS UHF Communications Unit (CUCU). CUCU was delivered to the Space Station on STS-129. The ISS crew commands Dragon using the Crew Command Panel (CCP). Dragon can also communicate on S-band via either tracking and data relay system (TDRSS) or ground stations.
Environmental Control System: Astronauts will enter Dragon to remove cargo. The craft provides a habitable cabin with air circulation, fire detection and suppression, lights, pressure control, and pressure and humidity monitoring.
Thermal Protection System: Primary heat shield is made of tiled Phenolic Impregnated Carbon Ablator (PICA) fabricated in-house. The backshell is made of SpaceX Proprietary Ablative Material (SPAM).
Parachutes: Dual drogue parachutes slow and stabilize the craft before three main parachutes bring it to a gentle landing. Dragon can also land safely with only one drogue and one main parachute if needed.
Transporting Crew: To ensure a rapid transition from cargo to crew, SpaceX has designed the cargo and crew configurations to be nearly identical, with notable exceptions including the need for a crew escape system, the life support system, and onboard controls that allow the crew to take control from the flight computer when needed. This focus on commonality minimizes the design effort and simplifies the human- rating process, allowing systems critical to Dragon crew safety and ISS safety to be fully tested on unmanned demonstration flights and cargo resupply missions.