Topic summary
RatSat

RatSat or DemoSat is an aluminummass simulator on the fourth flight of the Falcon 1 rocket, launched on 28 September 2008. Ratsat remained bolted to the second stage of the carrier rocket after reaching low Earth orbit. It is an aluminium alloy chamber in hexagonal prism shape with 1.5 m (5 ft) length.
The Falcon 1 launch that carried Ratsat to orbit was the first successful orbital launch of any privately funded and developed, liquid-propellantcarrier rocket, the SpaceXFalcon 1, something only six nations had successfully accomplished previously.
The launch, identified as Falcon 1 Flight 4, was conducted by SpaceX, and also marked the first time the Falcon 1 rocket successfully achieved orbit, after three consecutive failures on the three previous launch attempts.