Westerly Centaur - Propeller size

[tarik]

Morning all,


I would appreciate some advice re the type of propeller for a Centaur 2 or 3 blade and size.


As always very many thanks for all replies.



David

 

[Tranona]

The size of the prop depends on the engine and gearbox combination, rather than the boat. Put your boat details into the Propcalc programme on www.castlemarine.co.uk to give a good guide. If you are buying new, provide the details of your boat to the supplier and take their recommendation.

 

[Iliade]

+1 or ask Lancing Marine.



A 3-blade will cause more drag when sailing, but get the engine's power into the water more effectively. I recently refitted my Centaur with a Beta 14hp (that later proved to be a 10hp!!) and fitted a three bladed prop as I considered that I needed to use as much of the available power as possible. Luckily!

A 2-bladed prop would sail better, especially if you brake it when vertical. Provided it is big enough to absorb the available power it'll motor fine...

A 3-blade may be smoother running (less vibration as it passes the keelson) and can generally absorb more power for a given diameter.

 

[FullCircle]

Sillette Sonic are also excellent. There is a prop selection guide here....


http://www.sillette.co.uk/propeller_selection_help.html