Abstract: A dual power helicopter without a tail rotor. The dual power helicopter of present invention primarily uses two power devices which can be rotated in opposite directions to control the flight of the helicopter. The two power devices are rotated in the opposite directions by steering gears from a same engine, such that the engine power can be completely transmitted to the two power devices, enabling the engine power to be completely developed, thereby improving performance of the helicopter.

Abstract: A dual power helicopter without a tail rotor is especially a kind of helicopter with an enhanced ascending and descending power through the dual power. The dual power helicopter of present invention primarily uses two power devices which can be rotated in opposite directions to control a flight of the helicopter. The two power devices are rotated in the opposite directions by steering gears from a same engine, such that the engine power can be completely transmitted to the two power device, enabling the engine power to be completely developed, thereby improving a performance of the helicopter.

Abstract: A diversified tracking-positioning system and its operation method refer specially to a tracking-positioning system of a strategic alliance of satellite and telecommunication vendors. The tracking-positioning system combines primarily the satellite vendor with the telecommunication vendor, and further obtains a geographic position of a locked-on person through configuring a SIM card of user's cellular phone, followed by transmitting the geographic position to pre-configured telephone subscribers through sending a news brief, such that the geographic position of locked-on person can be quickly found out to proceed with a searching or rescuing.