Chinese Cheaper Choppers and Baghdad's apartment with helipad

By Ultralight Helicopters - August 11, 2021

Mosquito helicopter Hangzhou

"Low Altitude Freedom" is a DIY kit that airplane enthusiasts like, and it is also commonly called "mosquito plane" or "mosquito helicopter".

By the Development Co., Ltd. Hangzhou Star low-altitude helicopter manufacturing. It can be mainly used for agriculture, forestry and plant protection, rescue and disaster relief, fire rescue,

杭州萧山坎山工业园区

UAV modification, aerial photography, geographic mapping, patrol, line patrol, etc.

power system:

The power of the mosquito helicopter comes from MZ202, 60-hp, a two-stroke, two-cylinder power engine. This engine uses Reed's air intake system with a flat torque/speed curve. The power output is very stable in the engine operating range. The MZ202 works speed of about 6000RPM other than the engine rotation speed of 6500 ~ 7000RPM sibling is low , and therefore the burden MZ202 relatively light, but also improves the reliability of this engine. The total weight of this engine is only 69 pounds, including a 180-watt generator to provide the power system and the power to start the operation of the system.

Control System:

The control system is unique to the mosquito helicopter. The main rotor is controlled by the control rod and the set-lift variable pitch rod, through the control device on the mast seat, the push-pull tube, and the main rotor control panel (SWASH PLATE). The tail rotor is driven by the foot pedal. verb: move.

The main reduction gear is directly fixed on the engine. Because the centrifugal clutch engine starts without the load of the rotor. The power is transmitted from the clutch to the speed reducer through the HTD belt set. This is a transmission system that can exert the highest horsepower/weight ratio. The pulley covers the clutch so that the engine can over-rotate when the helicopter rotates. The power is transmitted to the gearbox at the tail of the aircraft through a universal joint and a floating drive shaft. The gear box transmits the power to the tail rotor through the drive shaft of the tail tube. The other drive shaft transmits power through the second high-load HTD belt to the secondary deceleration above the main rotor mast.

Rotor system:

The main rotor is a semi-rigid structure: it is composed of an aluminum structural beam covered with an aluminum skin. Foam material plugs are plugged at both ends to prevent internal contamination.

The tail rotor is also a semi-rigid structure: it is composed of an aluminum tube covered with a layer of aluminum skin, foam plugs are plugged at two ends, and a 45-degree drag hinge is used to align the tail rotor.