Space1 initiated a rocket study that involved cross hybrid rockets and rocket parts such as fuel delivery valves. What came out of this study is a major way to make Space1 rockets 300% larger without staging or clustering.
The rocket study suggests the design and use of the most massive single engine ever invented in the scientific realm of S1.
This means the rocket can carry more fuel, travel farther, is more safe and reliable with less components, and has the ability to offer greater fuel valve control and can achieve its goals with few or no moving parts.
In the new missions, the rocket starts out fat and slow upon launch but as fuel is eaten up, rapid acceleration begins and finally it's moving along at the highest speeds Space1 has ever achieved!