Falcon 9 Block 5
Specifications
Specifications
--------------

Specifications and characteristics are as follows:

| Characteristic | First stage | Second stage |
| --- | --- | --- |
| Height |  |  |
| Diameter |  |  |
| Empty mass |  |  |
| Gross mass |  |  |
| Structure type | LOX tank: [monocoque](/wiki/Monocoque "Monocoque")Fuel tank: skin and [stringer](/wiki/Stringer_%28aircraft%29 "Stringer (aircraft)") | LOX tank: monocoqueFuel tank: skin and stringer |
| Structure material | [Aluminum lithium](/wiki/Aluminium-lithium_alloy "Aluminium-lithium alloy") skin; [aluminum](/wiki/Aluminum "Aluminum") domes | |
| Engines | 9 × [Merlin 1D](/wiki/Merlin_1D "Merlin 1D") | 1 × [Merlin 1D Vacuum](/wiki/Merlin_1D_Vacuum "Merlin 1D Vacuum") |
| Engine type | [Liquid](/wiki/Liquid-propellant_rocket "Liquid-propellant rocket"), [gas\-generator](/wiki/Gas-generator_cycle "Gas-generator cycle") | |
| Fuel | Kerosene ([RP\-1](/wiki/RP-1 "RP-1")) | |
| Oxidizer | [Subcooled](/wiki/Subcooled "Subcooled") [liquid oxygen](/wiki/Liquid_oxygen "Liquid oxygen") (LOX) | Liquid oxygen (LOX) |
| LOX tank capacity |  |  |
| RP\-1 tank capacity |  |  |
| Engine nozzle | Gimbaled, 16:1 expansion | Gimbaled, 165:1 expansion |
| Total [thrust](/wiki/Thrust "Thrust") |  |  |
| Propellant feed system | [Turbopump](/wiki/Turbopump "Turbopump") | |
| [Throttle capability](/wiki/Throttleable_rocket_engine "Throttleable rocket engine") |  |  |
| [Restart](/wiki/Rocket_engine_restart "Rocket engine restart") capability | Yes (only 3 engines for boostback/reentry/landing burns) | Yes, dual redundant [TEA](/wiki/Triethylaluminum "Triethylaluminum")\-[TEB](/wiki/Triethylborane "Triethylborane")[pyrophoric](/wiki/Pyrophoric "Pyrophoric") [igniters](/wiki/Rocket_ignition "Rocket ignition") |
| Tank pressurization | Heated [helium](/wiki/Helium "Helium") | |
| Ascent [attitude control](/wiki/Spacecraft_attitude_control "Spacecraft attitude control")([pitch](/wiki/Pitch_%28aviation%29 "Pitch (aviation)"), [yaw](/wiki/Yaw_%28rotation%29 "Yaw (rotation)")) | [Gimbaled](/wiki/Gimbaled_thrust "Gimbaled thrust") engines | Gimbaled engine and [nitrogen](/wiki/Nitrogen "Nitrogen") [gas thrusters](/wiki/Cold_gas_thruster "Cold gas thruster") |
| Ascent attitude control([roll](/wiki/Flight_dynamics_%28aircraft%29 "Flight dynamics (aircraft)")) | Gimbaled engines | Nitrogen gas thrusters |
| Coast/descent attitude control | Nitrogen gas thrusters and [grid fins](/wiki/Grid_fins "Grid fins") | Nitrogen gas thrusters |
| Shutdown process | Commanded | |


Can you explain how the rocket's performance is affected by its weight?