3.2*1.2*0.83m(Without blades)


3.6m (One pair , two propellers)

Empty weight


Max Takeoff  Weight






Aluminum alloy for aeronautic

Flying Speed


Engine Power

34 hp

Propulsion System

Water cooled rotary engine


20L 92# Gasoline

Hovering time



Max flying altitude

3Km(sea level)

Spraying Area in one flight

2.7hectares /flight

Flying prepare time


Radius of flight control


flight Mode

Smart mode ,manual plus mode ,manual mode

RTK Technology(optional)

Plane accuracy:±8mm+1ppm

Height accuracy:±15mm+1ppm

Anti-wind ability

Force 5 wind

Rain resistance

Light rain

Working temperature


Storage temperature


How about the efficiency of the agricultural plant protection drone?
The spray efficiency of the SY121H is about 2.7 hectare(6.6 acres)/flight.

What are the advantages of SY121H in shape design and the method of installation?
The aircraft adopts streamlined design. It looks both beautiful and reduces the resistance in flight. The housing adopts left-right open and close installation method, which is convenient for maintenance and installation, improving the maintenance of the system.

Why does the ground control station use industrial 3 proofings design?
The ground control station adopts industrial 3 proofings design. Which is convenient for integrated design of helicopter detection, mission planning, telemetry data transmission, flight data display and operation control.

 Do you offer customization?
Sure. Customization of drone aircraft can be achieved easily and it is our biggest strength. You can raise your requirement for the customizing, then it will be processed by our professional managers. We offer a set of products and variations corresponding to various payload ranges.

Can you share me some videos about agriculture drone spray work?
Sure, we have many videos in YouTube, you can search it as the key words, like sunwin # SY141HR # SY121H# Agriculture drone.

In comparison with others drones, what are the benefits of the drones you provide?
l Multi-functions: designed for agricultural and industrial use, including disaster prevention, aerial measurement, spraying chemicals, routing inspection, photography, and observation missions.
l Total power of SY121H more than 34 Pferdestarke, actual takeoff weight up to 120 kilograms. Payload is 35kg.
l Airborne 150W generator and rectifier stabilized voltage power supply support the avionics equipment and load power requirements.
l Pilot can choose three flight modes: Smart mode, Manual Plus mode and Manual mode.Under Smart mode, the flight can be easily planned without need for mapping knowledge or other software.

 Which loading modules can be carried by the SY121H?
The SY121H can payload 2 pieces of 23L capacity pesticide boxes, aerial searchlight module, communication relay module, aerial video transmission module (picture transmission),aerial multi-purpose throwing modulepowerline inspection module and so on.

Is RTK standard?
The RTK technology of the SY121H is optional. The hovering accuracy of the SY121H without RTK technology is about ±1m. Using RTK technology, the plane accuracy range is ±8mm+1ppm and height accuracy is ±15mm+1ppm.

Does the drone contain lightning protection modules?
The fuselage of the drones is made of carbon fiber. The fuselage itself is a conductor, which can export thunder and protect the internal parts of the fuselage. In addition, drones generally don’t fly in lightning weather.

The problem about drone’s price .
The price of drones varies mainly depending on the product and the loading conditions involved. For details, please consult our sales manager via Skype.

Do you provide warranty for your drones?
The warranty is valid for one year. Of course, there is a possibility of extending the warranty period, it’s depending on the volume of the order.

Do you provide after-sale service? What cover warranty?
Besides 24 hours contact availability, during the warranty period,Sunwin is also responsible for providing the replacing parts caused by drone itself. However, Sunwin will not take the responsibility if the malfunction is caused by the operators.

Do you provide instructions on how to operate a UAV?
Sunwin provides the UAV flight training, but the training will be exclusively offered in Beijing and Hefei, Anhui China. We have a professional UAV training institution authorized by CAAC, authenticated by AOPA. Teaching our customers how to use our UAV and professional engineers will give you the best technical support. It is completely free of charge (meals and accommodation are not covered) and takes one week to complete.

How could I become an official Sunwin distributor?
Sunwin welcomes potential distributors to pay a visit to its factory for the demonstration of our competence, sharing ideas and discussing face to face partnership. Contact us to arrange a meeting.

What do I have to bear in mind before my first flight?

l Make sure you are in an open and safe environment.

l Make sure the drone is placed on a flat surface.

l  Keep in mind that surrounding electromagnetic signals might affect the performance of the drone.

l Compass Calibration is always highly suggested before each flight.

l  Never start in normal mode and then switch to GPS mode when the drone is off the ground. The drone will only set the home location when taking off in GPS mode. This is the main cause of pilot error fly always as the drone will attempt to fly back to its previously set home point.


Model of UAV  File Size  Click to Download
SY121H  Large Load Agricultural Unmanned Helicopter    1.0MB 
SY121H Download- Specification.rar