SpaceX first static ignition test of the world’s largest rocket booster


On Monday, Elon Musk, CEO of SpaceX, a US space exploration technology company, said the company successfully completed the “static ignition” test of the world’s largest rocket booster in its first attempt.
SpaceX’s new booster is called super heavy booster, and its current test number is B3. Around July 1 this year, SpaceX completed the assembly of the B3 prototype and quickly installed it on the customized bracket used to test and launch the Starship prototype.
In less than two weeks, SpaceX completed the installation of B3 avionics, piping and a raptor engine, and the prototype passed its first low temperature tolerance test on July 12. In the test, instead of flammable liquid methane and oxygen propellants, B3 uses liquid nitrogen, which can provide about the same extremely cold temperature and mass as the booster, but without the risk of large-scale explosion.
After that successful test, technicians quickly installed two other Raptor engines and finished the final work of the booster. On July 19, B3 “resurrected” for the second time.
SpaceX closed the road, cleaned up the launch pad, and began to inject propellant into B3 for the first time around 6:20 p.m. on the 19th. It is almost the same as the pre launch state training or static ignition test of the key facilities and equipment of the conventional starship. The three Raptor engines on B3 finally started successfully at about 7:05 p.m.
Unlike almost all tested starship prototypes, including the first one equipped with multiple Raptor engines and conducted static ignition test, B3 completed the static ignition test in its first attempt.
In the history of starship testing, the original prototype never passed the low temperature test or static ignition test in the first attempt. In the process of SpaceX’s basic operation test of starship, almost without exception, there will be small or large problems before or during the initial test attempt.
However, although B3 is actually the largest rocket booster prototype built in space history and the first of its kind, it seems that B3 has not encountered any obvious problems after fully preparing for the first two major tests. In short, the successful test of B3 fully shows that the design, production and operation of SpaceX’s interstellar launch vehicle are rapidly maturing as SpaceX accelerates its first orbital launch attempt.
Meanwhile, musk said SpaceX “may try nine Raptor engine ignition tests on B3,” depending on the production progress of B4.
From all indications, SpaceX started stacking B4 around July 16 to support the first orbital launch attempt of the Starship. According to the assembly experience of B3, B4 can be completed in the middle and late August.
After installing nine Raptor engines, B3 can generate 1800 tons of thrust in a short static ignition test, only 20% less than the Falcon heavy rocket( Tencent technology reviser / Jinlu)