Sillette stock a comprehensive range of competitively priced Bronze Eliche Radice Folding Propellers for both Shaft and Sail Drive Installations.
Reducing the propeller drag during sailing
(propeller drag is reduced about 90% compared to the traditional two fixed blades propeller).
The opening operation is automatic and is caused by the centrifugal force, increasing according to the engine revolution. In forward gear the pressure on the blades allows a performance equal to the fixed-blades propeller.
During this opening phase fast acceleration of the engine is not advisable, and we recommend smooth and gradual speed increase.
Even at low revolutions the centrifugal force is enough to open the blades.
When sailing, a forward speed of 1 to 2 knots generates sufficient water pressure for the blades to close.
Reverse gear has always been the main problem for folding blades propellers. This is mainly due to the water pressure acting in opposition to the blades opening and the lack of a support point for the blades on the hub, only partially open.
In order to avoid this Eliche Radice studied and tested special blade sections that allow the blades to remain fully open during reverse operation with positive manoeuvring results.
Eliche radice folding propellers are:
Available in a wide range of right hand and left hand rotation that will suit almost any hull and engine.
Manufactured with high accuracy and dynamically balanced.
great for the best performance, they will also eliminate vibration and noise.
Mounted with blades coupled by means of gears that ensure a balanced opening and perfect closing during sailing.
Working tolerance: ISO 484 - class 1°
Eliche Radice Propellers are manufactured from OTMAN alloy
mechanical resistance = R 535 N/mm.2
yielding = S 220 N/mm2
elongation = As 25%