Next message: C. Marin Faure: "TWL: Design criteria (was Storm tactics....)"
Thank you all those who responded to my question I very much appreciate your
input. I am still not sure. On the initial cost and ongoing maintenance side
of the equation it's the cost of twin engines vs. a single engine, a wing
engine and a bow thruster, I reckon the costs would be very close. Get home
ability, fuel supplies and electrical systems can be and should be separated
so twins or a single with a wing should both be able to do the job, but the
twins would be run more often, each twin would have more HP than the wing
and throw it's effort over a rubber giving good steerage which many wing
engines don't. I would not be prepared to go to sea without some type of
backup because the boat will be used in many remote locations with on shore
winds, I am not a mechanic and I want the piece of mind. Maneuverability
lets say it is equal. Twin keels (fully protecting the screws and rudders)
would by my preference over a single keel for the ability for the boat to be
able to sit on it own bottom. Too much gear in the engine room, the boat
will be about 52ft so I don't see this as an issue with either twins or a
single, wing and thruster. So it just comes down to running costs and range.
Two Cummins 6Bs at 96hp each thru two props vs one Cummins 6BT at 210hp thru
one prop.
regards
John Holbrook
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