Welcome to AMARTECH bv - Propulsion System Engineers

Fixed Pitch Propeller systems

The fixed pitch propeller system (FPP) will be custom engineered and delivered as complete package. The systems are water lubricated. Several components have been awarded at the Design Award METS (DAME).

Custom Designed Propellers

The high skewed propeller will be custom designed to meet optimum performance. The section and blade-area ratio will be optimized to reach the lowest noise and vibration levels. Propeller blades are machined by CNC machines. Finish tolerance to ISO Class I or S possible.

Shaft brackets (optional)

The shaftbracket (V or P) will be custom design to meet the hull shape.
Can be produced in steel, stainless steel, aluminium or aluminium bronze.
The shape of the bracket-profile will be custom designed to guarantee
lowest drag.

Sterntubes

The EasyStern® sterntube system is specially designed to reduce noise
and vibration levels in the hull. The EasyStern® ClampSeal will make the
(de-)installation as easy as possible.
Glass-in type sterntubes are available for polyester yachts.

Propeller shafts

Designed according to the requirements of the classification societies.
Both keyed and keyless application. Stainless steel Duplex 1.4462 ground material will be used for most of the shafts.

AxiSeal® shaft seals

The AxiSeal® is a drip less
propeller shaft seal.
Maintenance free during the life-time.
The stand-by seal will be mounted
for emergency cases.

Thrust bearings and Flexible couplings

Propeller thrust will be absorbed by a heavy duty thrust bearing.
Combined with a soft flexible coupling the engine can be put on soft engine mounts. For optimum isolation of noise and vibration. A flexible coupling without thurstbearing is also a possible solution. The isolation of noise and vibration is less. The final choice depends on the requirements of yacht-owner and available budget.

Calculations

• Shaft-alignment,
Gap and Sac calculation
• Lateral vibration analyses
• Axial vibration analyses
• Torsional vibration analyses
• Other Finite Element calculations