2015年8月4日 · The first set of GPS satellites contracted in 1974 and launched in 1978 was referred to as "Block I", and the first version of the Phalanx CIWS that went into production in 1978 is "Block 0", but that name may well have been retroactively applied when the Block 1 upgrade became a thing. Ranger's three development blocks predate Redeye, though:

2024年10月23日 · TLDR: The first Block 2 starship is ship 33, which is not ready to fly. Ship 33 has recently been fully stacked, but that doesn’t mean it’s finished. It still needs its engines installed (suspected to be V3 engines, though this hasn’t been confirmed by SpaceX yet) and other flight features.

2022年9月19日 · There are two main differences between Block 1 and Block 2, and those two differences coincide with the two major upgrade steps, Block 1B and Block 2. What geoffc's answer describes is one half of the upgrades and is not the upgrade that is introduced with Block 2.

2019年1月5日 · Could the SLS block 1 reach orbit without solid rocket boosters, and if so, how much payload could it lift? Fully fueled, the first stage alone has only an 0.77:1 thrust-to-weight ratio; it can't even get off the ground without help from the boosters, which produce more than 4x as much thrust as the core.

2020年9月12日 · Has the G-force curve for the launch of Block 1, Block 1B, or Block 2 (crew and or cargo) Space Launch Systems been determined? If there is no published estimates for the curve, is the estimate of the maximum G-force with any of the configurations?

2024年10月20日 · $\begingroup$ Ship 31 is their last block 1 ship. It is expected that they aren't going to try orbiting or pretty much anything else new until block 2. Block 2 has a large number of expected changes, too many to list in comments maybe someone will list them in an answer. Not even payload testing because block 2 has a different sized payload bay.

The engine was changed from the Merlin 1-C to the Merlin 1-D which has higher thrust at 145,000 lbs at sea level. It is also reputed to be more easily manufactured. Engine layout. The engine layout has changed. It changed from a 3X3 grid (tic tac toe) layout to the Octo-web layout of eight engines in a cirle, with a ninth in the center. Landing ...

2017年5月15日 · $\begingroup$ Aha - that's EM-1: 70 tons to 1800x93 without using the ICPS. The low perigee ensures reentry and disposal of the core stage, and the ICPS will do a translunar injection burn at 1800km. My launch simulator suggests that SLS + ICPS can get ~77.5 tons of payload to 200km circular orbit, but I could be off by quite a bit. $\endgroup$

The 70ton capacity of the SLS Block 1 is measured for low-earth orbit. But getting people just into LEO isn't the goal of the SLS. It is designed for missions beyond earth orbit to destinations like Moon or Mars. The Orion capsule itself hasn't got enough fuel to get to the moon and back on its own. It has a delta-v capacity of less than 2000 m/s.

2020年6月1日 · According to Silverbird, SLS Block 1 with boosters but no upper stage, launching from Canaveral into a 185km circular orbit at 28º inclination, can orbit an estimated 66 tons of payload. (It actually gives a wide range of payload masses, 50-85 tons, because of uncertainties in its model of the SLS.