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  1. BBC SPONSOR
    Join Date
    Jun 2004
    Location
    Bull Shoals, Arkansas
    Posts
    3,546
    #21
    My 2080 with 200 Merc.... 63-64 with two guys tourny load and 66-68 by myself!

  2. Member
    Join Date
    Mar 2011
    Location
    Chesapeake City, MD
    Posts
    148
    #22
    Quote Originally Posted by Chuck Pickel View Post
    My 2080 with Merc 200 ProXS with myself, 230lbs, the wife 130lbs, 15 gal of fuel, fishing tackle, no water in live well,Ghost TM, 8"chop, 5800 RPM, hydraulic plate with prop shaft 2" below pad ran 65.3 mph, on Lowrance GPS.

    Does anyone know the formula to figure optimum speed? Figures in pitch, and RPM? that's
    a good starting point. No boat will run faster than the calculated speed, due to weight and drag.
    Long formula:
    Engine RPM/gear ratio= prop rpms
    Prop rpms x prop pitch= travel distance (inches) per minute
    Travel distance/12= feet per minute
    Feet per minute/5280= miles per minute
    Miles per minute x 60= Theoretical top MPH

  3. #23
    Quote Originally Posted by thebentpole View Post
    Long formula:
    Engine RPM/gear ratio= prop rpms
    Prop rpms x prop pitch= travel distance (inches) per minute
    Travel distance/12= feet per minute
    Feet per minute/5280= miles per minute
    Miles per minute x 60= Theoretical top MPH
    So at 6000 rpms, 23p prop.........74.5MPH is the theoretical top end for a PXS 200. I am "slightly" less than that
    2021 Vexus 2080, Merc ProXs 200
    2019 Vexus 1980, Evinrude G2 150 H.O. - moved onto a new owner

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