The quadcopter frame YD4-1000S comes with many great features.
Its one-time forming carbon fiber reduces weight while still keep the stiffness,which makes it stronger and lighter for long time(up to 65 minutes) flying tasks.For instance,equipped with a small camera like Gopro,the firefighter is able to monitor the fire scene for a long time which is crucial for the fire fighting.Also you might use it for 3D mapping and other long time aerial photography tasks.
Furthermore,with a glass fiber canopy,the GPS signal will not be blocked.Its detachable frame arm makes YD4-1000S very easy to carry and easy for maintenance.
Another very useful feature is its waterproofness and dustproofness,which enable the drone to fly under most weather conditions,like rainy days.In this case,it is an idea tool for police security monitoring,fire fighting,emergency research and rescue.
1)1200mm axle diameter
2)5KG payload capability
3)65 minutes flight time(no payload)
5)Motor capatible:T-Motor U8/U10
6)Max propeller size:28 inch
7)Battery compatible:1pcs 22.2V 30000mah or 2pcs 22000mah lipo battery
8)Completely waterproof and dustproof
More information http://www.yangdaonline.com/yd4-1000s-waterproof-quadcopter-frame/