Tunnel Thrusters are Fixed Pitch Propeller or controllable pitch propeller thrusters. The features as follows:
-Superior Strength

Tough and rational structural design has accomplished superior strength ,Especially strong and durable driving shaft and seal are adopted for longer operation.

-Less Noise and vibration
Employing thicker duct plate, developing new propeller design and so on have achieved less noise and vibration which follow comfortable living environment on board
-Easy Installation and Periodical Inspection
is especially reduced duct lip and has a structure that it is able to weld anywhere on outer surface of duct for installation, On the periodical inspection, it is almost

not needed to change parts except seal.
-Various type of driving
Compact new control system can provide easy operation. Customer can choose various configuration of prime mover, electric motor, diesel engine or hydraulic motor.