Propellers on all sides?

Discussion in 'Boat Design' started by MaisieI, Oct 10, 2019.

  1. MaisieI
    Joined: Oct 2019
    Posts: 1
    Likes: 0, Points: 1
    Location: London

    MaisieI New Member

    I’m entering a competition to build a boat and the brief says to deliver humanitarian aid. One member of my team suggested having propellers on each side to eliminate the need for turning since the course we need to go through is tight. I wondered if there was a reason that you don’t really see this design? Is there a logistical issue or is it just not useful for any normal purposes? Either way I thought this forum probably has the best people to ask.
  2. jehardiman
    Joined: Aug 2004
    Posts: 3,683
    Likes: 1,068, Points: 113, Legacy Rep: 2040
    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    You do see it, they are called thrusters. Modern ships that have to be maneuverable usually have tunnel thrusters forward, and azimuthing main propulsion aft.
  3. BlueBell
    Joined: May 2017
    Posts: 2,444
    Likes: 825, Points: 113
    Location: Victoria BC Canada

    BlueBell . . . _ _ _ . . . _ _ _

    A single prop and rudder, or an outboard would be more efficient than side props.
    Can you post the rules?

  4. W9GFO
    Joined: Dec 2014
    Posts: 209
    Likes: 16, Points: 18, Legacy Rep: 39
    Location: Olalla, WA

    W9GFO Senior Member

    It is not clear to me what the constraints of the course are. For a small boat with a single prop and rudder it is not too difficult to maneuver it in such a way as to turn around within it's own length so I am having difficulty imagining a course that would require anything unusual.

    The only boats I can think of that have "propellers" on the sides are paddle wheelers and row boats.

    Ferry boats often have propellers and rudders at both ends, that eliminates their need for turning around when leaving or reaching their docks.
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.