rudder | Boat Design Net

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Orcas attacks in Spain. How strong leisure crafts really are ?

More than 500 interaction events recorded since 2020, 28 damaged ships, three sunken. The spike in aggression towards boats is a recent...

Thread by: Alan Cattelliot, Jun 16, 2023, 14 replies, in forum: Boat Design

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Hydrofoil Construction Questions

I am looking to build flattened V-shaped dagger-board lifting hydrofoils similar in design to the Nacra 17 Olympic foils for a Supercat 20 tall...

Thread by: TJ Cameron, Jun 4, 2023, 10 replies, in forum: Fiberglass and Composite Boat Building

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What Characteristics Define a Rudder ?

I suspect this is not strictly a design question; but, possibly more one of regulation. However, the discussion does enter the realm of design, if...

Thread by: member 76956, Oct 15, 2022, 19 replies, in forum: Boat Design

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Rudder Construction

My Tartan 30 is in need of a new rudder. Being that a replacement could run up to $2000, I am inspired to build my own. By the looks of my first...

Thread by: James Sullivan, Feb 28, 2022, 6 replies, in forum: Sailboats

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Rudder mount design for small outrigger

I have a small tacking double-outrigger I'm adapting from a fibreglass surf ski. It uses 40mm OD aluminium round tubes as akas. I'm wanting to...

Thread by: peteyak, Jan 11, 2022, 13 replies, in forum: Multihulls

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Advice on dropping a rudder as the seal is rusted out

I'm new to steel hulls and have a 41' vessel sitting on the hard standing so think it a good opportunity to drop the rudder to make some repairs...

Thread by: Banksy, Dec 9, 2021, 9 replies, in forum: Metal Boat Building

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Can a rudder produce a strong turning force on a sea kayak; other wave-fighting recommendations?

Does a rudder only provide a slight turning force that helps a little, or can it provide a strong turning force comparable to the strongest...

Thread by: mitchgrunes, Jun 18, 2021, 12 replies, in forum: Boat Design

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Twin Rudder lead and sizing?

Dear All, I am currently facing the task of sizing a twin rudder system for a sailing yacht. My current method has been to heel the boat at an...

Thread by: Claudio Valerio Parboni, Jun 8, 2021, 0 replies, in forum: Hydrodynamics and Aerodynamics

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Rudder for Thames barge hardware etc.

Hi all, I'm making a rudder for a newly acquired replica steel Thames sailing barge built in 1992. It's been on the hard for a few years, and the...

Thread by: Alfie, Mar 12, 2020, 13 replies, in forum: Boat Design

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Harmonic 24 rudder

Hey, Our rudder broke off in a storm, does anyone have the dimensions for a Wagstaff Harmonic 24 rudder? Thanks, Kat

Thread by: KHeron, Dec 13, 2018, 0 replies, in forum: Boat Design

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Balanced rudder with full skeg?

Hi, I need to rebuild my rudder and skeg and was considering changes. Currently it is a half skeg with a horn balanced rudder. I *might* just...

Thread by: richp10, Oct 10, 2018, 27 replies, in forum: Boat Design

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Parting OUT 76 Ranger 23 tall option and cradle.

Parting OUT 76 Ranger 23 tall option Any ideas on this topic give me a call. 774-275-1580 or Email adamsrichardlee@gmail.com It's in Worcester...

Thread by: Rikki, Oct 6, 2017, 0 replies, in forum: Marketplace

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Length of rudder post

Hi I am building a high aspect spade rudder in foam/GRP for my 33 ft sailing boat. The blade is around 1.6m long (5 feet 2 in). Is there any rule...

Thread by: Mikael Moge, Oct 2, 2017, 8 replies, in forum: Boat Design

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Pearson Coaster and Wanderer

Dear Sailors and Designers, I am strongly considering purchase of either a Wanderer or a Coaster. I spent a whole day in moderate wind on the...

Thread by: Erik S Frampton, Jul 24, 2017, 10 replies, in forum: Boat Design

Boat Design Gallery

Bondi 36 rudder blade

The rudder blade of the Bondi 36. The stock was laminated around a CNC machined foam core. The core was geometrically the most complicated part of...

Uploaded by: Karsten, Jul 27, 2014, 0 comments, in album: Member Album by Karsten

Boat Design Gallery

Horn rudder for tanker

Span 8.6 m Chord max 5.6 m Stock diameter 0.53 m NACA 0019

Uploaded by: Cacciatore, May 28, 2009, 0 comments, in category: Gallery of Student Design Work

Boat Design Gallery

Hydraulic Rudder Cylinder

Hydraulic steering cylinder produced in stainless steel 316. The exposed shaft can be protected by a gater to avoid barnacle growth on the...

Uploaded by: xrudi, Nov 29, 2008, 0 comments, in category: Propulsion

Boat Design Gallery

Stainless Steel 316 Hydraulic Rudder Cylinder

Hydraulic rudder cylinder produced in stainless steel 316. The exposed shaft can be protected by a gater to avoid barnacle growth on the cylinder...

Uploaded by: xrudi, Nov 29, 2008, 0 comments, in category: Propulsion

Boat Design Gallery

Turning an old slow boat into a rocketship - AFTER

Before and After Shots. 24ft boat was 350kg overweight with inefficient keel and rig. Not to mention the deck layout!! Al the rigging was...

Uploaded by: BOATMIK, Feb 15, 2006, 4 comments, in album: Member Album by BOATMIK

Boat Design Gallery

Levi Drive 280-300 Side view

Shows stainless steel 316 hydraulic rudder cylinder on Levi Drive 280-300.

Uploaded by: xrudi, Aug 14, 2005, 0 comments, in album: Member Album by xrudi