right prop???

[zephyrsailor]

can someone tell me what is the right prop to have on a beneteau first 345 with a volvo md2020d engine please?

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[Stemar]

Propellor sizing is an art, rather than a science, but Castle Marine's Prop sizing software should get you plenty close enough. Download it from http://www.castlemarine.co.uk/ShopFront.htm

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[PeterGibbs]

Stemar has made a good suggestion. As corroboration you could ask any reputable prop manufacturer to size it for you; with a few inputs from you - the normal suspects - engine size, gear box ratio, LWL, displacement etc you will converge on the best fit.

Where you will have to make a choice concerns the number of blades - assuming you go with a fixed prop. The gofast Darrens at the club will urge two blades to reduce that awful drag, the longer in the tooth cruisers (like me, yes) will urge three blades - we just like to see the wake churning like a P & O cruiser!

Or you could part with several hundred pounds and go for a folding type and watch the log just soar away under sail - er?

Propping a boat is one of the great pleasures in (this sailing) life.

Good luck,

Peter Gibbs

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[bedouin]

There are a number of prop-sizing programs available that will give you an idea, but if you are actually wanting to buy then I would recommend going to a reputable supplier and following their recommendation. That way they have an obligation to make sure the prop does what you want.

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[oldharry]

Lancing Marine will tell you the best prop size and configuration for you and your boat (i.e 2 or 3 bladed - they wll know the merits of each), and supply it for you. Unlike a theoretical programme they KNOW what works best from many years experience.

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