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TWL: Re: 1 prop vs. 2 props?

From: Jim Ague (no email)
Date: Wed Dec 17 2003 - 11:21:04 EST

  • Next message: bob Austin: "TWL: Boat purchase snag"

    > I have had a GB36 with a Cummins 210 for 3+ years. I run it at
    > 1900-2000 rpm and this gives me approx 8.3 knots

    On our Monk 36 we have cruised slowly through the NY canals, gunkholed
    around the Chesapeake and fought and rode the currents of SC and Georgia
    plus all points in between, putting on 1059.4 hours on the sole Perkins 135
    engine and 252.3 hours on the Onan 6.5kW generator. We cruise between 2000
    and 2200 RPM, normally 2100, and average 7.8 kts, plus or minus current.

    To do this we consumed 2631.0 gallons of diesel at a total cost of $3272.94.
    Our average cost for fuel is $1.244/gal. (I know I can do better!)
    Neglecting generator consumption of fuel, we averaged 2.48 gal/hr on the
    main. Presuming the generator consumes at a rate of 0.5 gal/hr and consumed
    126 gallons of the 2631, leaving 2505 for the main engine, the main averaged
    2.37 gal/hr.

    >
    > My biggest concern with 2 engines on a boat like the GB36 is that they
    > would fill the engine room. I am 6' 2" and the engine room, while snug
    > is easy to work in.

    Before buying the single engine Monk 36 we chartered for four days a twin
    engine GB 36. I didn't spend any time in its engine room, although I did
    peek and casually noticed almost non-existant room on the outboard sides of
    the engines.
    Compare this to the single engine of the Monk sitting right in the middle
    with access to both sides, I certainly prefer a single engine.

    -- Jim
    ~~~~~~~~~~~~~~
    Jim & Rita Ague
    Derreen, Monk 36
    ~~~~~~~~~~~~~~
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