Darglow Featherstream range

The latest 20" feathering propeller

Darglow Featherstream range of propellers are a simple solution to allow your yacht to perform to it full potential in all circumstances, FeatherStream fully feathering propellers are made in the UK at Salisbury / Wareham and range from 12" to 20" diameter all with three blades

Featherstream propellers require no operating system and fit directly to the existing shaft. The appropriate forward or reverse drive is automatically achieved when the engine is run ahead or astern. When the yacht is sailing the Featherstream automatically feathers to give minimum drag. The shaft remains stationary and there is no need for a shaft brake. One big advantage of the Featherstream range is the ability to fit into restricted apertures normally if there is a space for a fixed propeller you can fit a Featherstream
Design
 
Material
Aluminium bronze (AB2) used in the bodies and centre shaft, ANC 4A  heat treated Stainless steel blades which give a perfect match in terms of longevity, bearing material and corrosion resistance.
 
Casting
The Investment Casting Process commences with the production of High Quality Wax Patterns from Aluminium or steel Injection Tooling. These are then mounted onto a wax runner system and the assembled mould is coated several times with ceramic material and air-dried.
On completion, the mould is de-waxed leaving an empty shell which is subsequently fired and filled with aluminium bronze (AB2) for the body and centre shaft metal, 316 stainless steel for the blades, the shell is then allowed to cool and removed. 
Castings are cut from the riser/runner system, finished, the blades are then heat treated and passed through to quality control for a rigid Inspection Programme.
The benefits of the investment casting process may be summed up by the four words accuracy, versatility, integrity and finish. Few if any alternative metal forming methods can offer such a unique and broad spectrum of advantages

Machining
All the bodies,centre shaft and blades are CNC machined to a very high standard, allowing all components to be interchangeable.
 
Finishing
All Featherstreams are hand finish to customers vessel specification i:e vessel type, WLL, displacement weight, engine power, gearbox ratio, shaft taper details etc the pitch of the propeller is then set at Darglow but with the facility to fine tune by the customers if required. ( normally we get it right first time) the prop are checked for balance before final greasing and despatch.
 
Assembly
Normally takes about 1 hour max, once old fixed propeller is removed.
 
Maintenance
Maintenance is quick and easy, once a year the grease is topped up by injecting it with grease .The zinc anode protects the propeller from electrolysis and needs to be replaced as necessary.
 
Boatshow stand No G12
 
 

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