Outboard rudder vs. inboard rudder

Discussion in 'Boat Design' started by designdreamin, Jun 27, 2006.

  1. designdreamin
    Joined: Jun 2006
    Posts: 1
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: east coast

    designdreamin New Member

    Looking for a pro's and cons list, mainly performance oriented, on outboard versus inboard (under hull) rudder.

    boat type: A pretty light ficticious sport sailboat D/L is less than 100, boat could plane at times downwind or hot reaching. SA/D over 25. Ballast to disp ratio of around 40%, moderate beam to length, not narrow but not wide.

    just general thoughts to get things rolling. I appreciate the help.

    Performance pro's and con's
    outboard pro's
    I'm told farther away from the keel. but why is that important.
    more direct feel?

    Can make a narrow rudder due to no rudder stock. but why is this important and doesn't a rudder too thin harder to drive in the groove...or is it easier?

    Outboard cons
    ventilation? But what exactly is this and doesn't a inboard rudder experrience it anyway? At what point does it happen and can the driver prevent it? If the boat is sailed without a lot of weather helm isn't it a mute issue? Flat is fast???

    Inboard pro's
    balance? But can't a outboard one feel balanced?

    inboard cons
    short "wheelbase" hencec turning radius or feel?

    Again I'm just getting things started, I hope someone can come up with a better organized pro and con list of both. I am just looking for a general education on this.

    I apprecaite the responses. I understand being "new" to the forum and asking a quesiton that was covered before can be frustrating for regulars. I tried to search but couldn't find a direct discussion.
     
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