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    Propellors
    14 Posts ยท 7 Followers ยท 0 Photos ยท 3 Likes
    Began 2 months ago by
    Master Seaman
    United Kingdom
    Latest Post 2 months ago by
    Master Seaman
    Australia
    ( Newest Posts Shown First )
    taffy
    Master Seaman
    ๐Ÿ‡ฆ๐Ÿ‡บ Australia
    ๐Ÿ“ Propellors
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    Country: ๐Ÿ‡ฆ๐Ÿ‡บ Australia
    Online: 1 day ago
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    thank you, gentlemen, much appreciated.๐Ÿ‘
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    taffy
    Master Seaman
    ๐Ÿ‡ฆ๐Ÿ‡บ Australia
    ๐Ÿ“ Propellors
    36 Views
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    Country: ๐Ÿ‡ฆ๐Ÿ‡บ Australia
    Online: 1 day ago
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    Thank you I will check them out.๐Ÿ‘
    peterd
    Warrant Officer
    ๐Ÿ‡ฆ๐Ÿ‡บ Australia
    ๐Ÿ“ Propellors
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    Country: ๐Ÿ‡ฆ๐Ÿ‡บ Australia
    Online: 5 hours ago
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    Agreed with Float a Boat. Great service and good people.
    boatworx
    Able Seaman
    ๐Ÿ‡ฆ๐Ÿ‡บ Australia
    ๐Ÿ“ Propellors
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    Country: ๐Ÿ‡ฆ๐Ÿ‡บ Australia
    Online: 27 days ago
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    Best place is Float a Boat in Melbourne they have a good range of Rabosch brass props for scale boats.๐Ÿ‘
    taffy
    Master Seaman
    ๐Ÿ‡ฆ๐Ÿ‡บ Australia
    ๐Ÿ“ Propellors
    48 Views
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    Country: ๐Ÿ‡ฆ๐Ÿ‡บ Australia
    Online: 1 day ago
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    Can anybody tell me the best place to get propellers from in Australia.
    Thank You in Advance.๐Ÿ˜†
    LewZ
    Warrant Officer
    ๐Ÿ‡บ๐Ÿ‡ธ United States
    ๐Ÿ“ Propellors
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    Country: ๐Ÿ‡บ๐Ÿ‡ธ United States
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    For a single prop I would go with a counterclockwise prop. Most motors are manufactured to turn counterclockwise (for efficiency) anyway. Check the data sheet for the motor you want. Here is an example of a common motor:
    https://datasheetspdf.com/pdf-file/1401824/MABUCHI/RS-380PH/1
    Lew Zee (LewsModelBoats)
    NickD
    Master Seaman
    ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
    ๐Ÿ“ Propellors
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    Country: ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
    Online: 4 hours ago
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    What I was actually asking was that when matching an electric boat motor to a propellor, what direction do I need for a motor that turns clockwise for forward motion.....a left hand or right hand propellor?
    LewZ
    Warrant Officer
    ๐Ÿ‡บ๐Ÿ‡ธ United States
    ๐Ÿ“ Propellors
    86 Views ยท 1 Like
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    Country: ๐Ÿ‡บ๐Ÿ‡ธ United States
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    I think this subject goes a little "deeper". If my old memory serves me correct I believe the theory is that a boat's transom actually moves left or right because of the propeller's depth in the water. Water near the surface has less pressure, and that pressure increases the deeper the propeller gets.

    The bottom line is that if a propeller turns counterclockwise there is less sideways pressure near the surface and the opposite side of the propeller (the bottom) has more sideways pressure forcing the stern of the boat's transom to go left (port). For clockwise rotation the opposite is true.

    So using a counterclockwise prop will cause the stern to move to the left and this is handy when docking a boat to the port or left side of the boat. By steering slightly to the left while going forward slowly the whole boat will actually slide sideways slightly left. This will make it easier to dock to the port side of the boat. If you want to make it easier to dock to the right side you would use a clockwise turning propeller. (Most use the left, port, side).

    As for dual props turning in opposite directions the sideways forces are equalized by each propeller. However if the left prop turns counterclockwise and the right prop turns clockwise there is more afterward thrust, again due to the deeper pressure.

    One thing to watch for when using brushed motors is most of them are more efficient in one direction than the other. This is due to the brushes being offset inside the motor. In my experience it seems the RPM is also greater due to this fact. So using two identical motors one on each prop, may cause one prop to turn slightly faster than the other.

    Lew
    Lew Zee (LewsModelBoats)
    NickD
    Master Seaman
    ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
    ๐Ÿ“ Propellors
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    Country: ๐Ÿ‡ฌ๐Ÿ‡ง United Kingdom
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    Thanks Len that's the answer I wanted....๐Ÿ‘
    RodC
    Petty Officer 1st Class
    ๐Ÿ‡จ๐Ÿ‡ฆ Canada
    ๐Ÿ“ Propellors
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    Country: ๐Ÿ‡จ๐Ÿ‡ฆ Canada
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    However...which side gets CW or CCW rotation? Is there conventional wisdom to, say, enhance steering? Or stern behaviour? I hav a Kort nozzle on my RTR tug, single shaft. But my interest is in what configuration to use on my twin-screw Springer tug.
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