Graupner,Ruderpropellerantrieb,1775

Ruderpropellerantrieb Graupner 1775 With 2 marine props 40 and 50 mm Ø. The SPPS thruster is a particularly efficient propulsion and steering unit for marine vessels.
Motive power is transferred to a horizontal positioned marine propeller via bevel gear and vertical shaft. The submerged part of the SPPS system including the marine propeller may be rotated 100º in either direction to port and star-board. The SPPS thruster is therefore particularly suitable for all kinds of marine vessels requiring great maneuvrability, such as tugs, tow boats and ferries. This type of propulsion and steering gear is also used in the SEABEX ONE diver depot ship R/C model. A servo providing 2 x 45º travel is required for SPPS thruster control.
The so-called Korth nozzle boosts the efficiency of the marine propeller, at the same time protecting it against mechanical damage.
The submerged part of the SPPS thruster can be disconnected from the main part by unscrewing a single screw. This feature simplifies cleaning the propeller. The marine propeller is equipped with a stainless steel thrust bearing. The SPPS thruster is designed for electric motors having an output of 25-50 W.