What's the term for a rudder that....

[Kmot]

Has a rudder attached to the rudder and it turns sharper than the main rudder? Almost forming a "U" shape?

I have seen it, and have forgotten the name. It is used on tug boats. I was telling Cap'n Horrible about it but the correct nomenclature escapes me at the moment.

[Tregurtha1013]

Has a rudder attached to the rudder and it turns sharper than the main rudder? Almost forming a "U" shape?

I have seen it, and have forgotten the name. It is used on tug boats. I was telling Cap'n Horrible about it but the correct nomenclature escapes me at the moment.

Becker Rudder is the term you are looking for.

[Umi_Ryuzuki]

Good memory,

It was mentioned some time back.
http://www.rcgroups.com/forums/showthread.php?t=344700&highlight=becker

:)

[Kmot]

Thank you! :)

[ronmeister]

Tug Boats use a voith schneider.
I'm pretty sure.

[ronmeister]

That's sick:
http://images.google.com/imgres?imgurl=http://www.westbourne-model.co.uk/model-boat-images/Graupner/Voith%2520Schneider.jpg&imgrefurl=http://www.westbourne-model.co.uk/&h=1798&w=1698&sz=71&tbnid=dQAtB4Aia6-wiM:&tbnh=150&tbnw=141&hl=en&start=1&prev=/images%3Fq%3Dvoith%2Bschneider%26svnum%3D10%26hl%3 Den%26lr%3D%26sa%3DN

[ooby]

Generically, they are sometimes called "articulated rudders," with 2 additional moving rudders linked to and part of the main one, resulting in a 3 section rudder.

[4bells]

Robbe makes a Becker Rudder: http://data.robbe-online.net/robbe_pdf_en/1488.pdf

[towboatjoe]

I think the one you're interested in is the one that will turn the aft part sharper than the main part. It's called a flap rudder. Here's a link to how to build one.
http://www.greatlakesmodeling.com/tips/flap_rudder/flap_rudder.htm

[Kmot]

Thanks Joe!

[LtDoc]

The 'flap-rudder' and the 'becker rudder' are the same thing. Different places, different names...
- 'Doc

[MikeK2]

I once sailed on a Bowater ship, converted to a drilling ship, that had a Becker rudder which also had a small electric powered prop on the aft side of the flap part. It was all disconnected by then but the control on the bridge was similar to a bow thrust quadrant