Tunnel Thruster: 
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.

Type	Propeller diameter (mm)	Power (KW)	Max thrust (KN)	Propeller type
MTT60	600	20~75	16	FPP
MTT90	900	75~210	33	FPP
MTT110	1100	200~330	46	FPP,CPP
MTT130	1300	310~470	66	FPP,CPP
MTT165	1650	450~760	108	FPP,CPP
MTT185	1850	720~1020	132	FPP,CPP
MTT200	2000	980~1270	165	FPP,CPP
MTT225	2250	1200~1550	235	FPP,CPP
MTT250	2500	1450~2100	326	FPP,CPP
MTT275	2750	2060~2480	378	FPP,CPP
MTT300	3000	2300~2930	462	FPP,CPP