accordingly under the control of electronic control system inside base 2012 for example when launching only one aircraft during acceleration wing 2060 and 2061 attached to pad 1020 carrying the aircraft generate positive upward lift by deflecting corresponding flaperon 2062 and 2063 downward and at the same time wing 2060 and 2061 attached to pad 1020 not carrying the aircraft generate negative downward lift by deflecting corresponding flaperon 2062 and 2063 upward while speed becomes faster and faster more lift are generated by wings of the aircraft and wings attached to pad 1020 so that counterweight 2030 can be shifted towards rotation center while wings of the aircraft generate lift equals to or larger than its weight the aircraft is released and fly off pad 1020 since during acceleration counterweight 2030 is already moved closer to center of rotation this makes it easier to quickly move counterweight 2030 to the rotation center while deflections of all flaperons are controlled to maintain balance and rotation speed of arm 2010 is gradually reduced when only one aircraft is landing steps to achieve dynamic balance is about the reverse of the above steps to achieve dynamic balance while launching only one aircraft for the case that optional telescoping mechanism 2018 exists when loading only one aircraft for launching while arm 2010 is not rotating the preferred position is retracted position the.