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"Grasshopper"
idea launcher reusable specialists has been embodied in the form of a pilot SpaceX rocket called Grasshopper (Grasshopper). This missile, with a height of 10-storey house is nothing but the first stage of the carrier rocket Falcon 9. The rocket Grasshopper installed a new control system F9-R, the contours of which receive data from the extra precision sensors that are able to provide exactly rocket landing at a predetermined position. The effectiveness of the new system F9-R was confirmed by the latest test flight rocket Grasshopper, who made a touchdown, deviated from its original position for only a few tens of centimeters.
Source: mirfactov.com/