“The BFR, which is variously said to stand for either Big Falcon Rocket or Big Fucking Rocket, announced in September 2017, is SpaceX’s privately-funded launch vehicle, spacecraft and space and ground infrastructure system of spaceflight technology—including reusable launch vehicles and spacecraft. The system includes Earth infrastructure for rapid launch and relaunch; low Earth orbit, and zero-gravity propellant transfer technology. The new vehicle, while much smaller than an earlier version of SpaceX composite material vehicle design, is much larger than the existing SpaceX operational vehicles which it is intended to replace.
The new launch vehicle is planned to replace both Falcon 9 and Falcon Heavy launch vehicles and the Dragon spacecraft, in the operational SpaceX fleet in the early 2020s, initially aiming at the Earth-orbit market, but explicitly adding substantial capability to the spacecraft vehicles to support long-duration spaceflight in the cislunar and Mars mission environment as well. SpaceX intends this approach to bring significant cost savings which will help the company justify the development expense of designing and building the new launch vehicle design. BFR is a 9 meters (30 ft)-diameter launch vehicle.
An earlier larger design for the first non-Falcon launch vehicle from SpaceX was known as ...