Definition
A SpaceX test program (2012–2013) using a 100-foot tall flying test stand to develop the technologies for vertical landing, including engine throttling, precision guidance, and landing leg deployment.
Why It Matters
Grasshopper proved that Mars-style vertical landing wasn’t a billion-dollar fantasy, but a ‘scrappy’ engineering problem that could be solved in a Texas field; it provided the critical data and confidence that eventually enabled the first stage of the Falcon 9 to land on a drone ship.
Core Concepts
- Scrappy Hardware: Built in McGregor using an old Falcon 1.0 tank, a Merlin 1D development engine, and avionics scavenged from the mothballed C1 Dragon spacecraft.
- Key Milestones:
- First Flight (Sept 2012): Hopped 6 feet.
- Final Flight (Oct 2013): Ascended to 2,400 feet and performed a precise lateral move before landing.
- Technical Learnings: Taught the team how to measure altitude through engine exhaust/dust and how to manage the “slosh” of partially full tanks during descent.
- Cultural Impact: Initially viewed as a “waste of time” by some engineers, its success eventually convinced the company that Mars-style powered descent was achievable.