rudder

this is for **26' sailboat monohull** And apologizes if there is extensive thread on this topic. any open source design availalble and or good youtube tutorial?' thanks yall

{27’ junkrig, fibreglass and cedar- almost in final stage for expedition. It is equipped with Yamaha t.9.9 exht. Specifics of model of the boat still under investigation due to hazy record keeping of previous owner.} Hi, folks thanks in advance. I’ll add more photosin the morning. 1. So...

How would you guys fiberglass a secure repair for the two damaged patches located at the rudder borders, with no space at the edges to grind a bevel? Boat is a Wauquiez being prepared for circumnavigation. From the original design drawings. Rudder layup schedule: 2850g =...

Just took over a good old working boat. I have vibrations and noise from the rudder and is pretty much is in all the boat. Is a steel working boat. I can see how the bracket for the rudder is shaking but is only in between 1600 rpm and 2000 rpm 5,5 - 8,5 knots and at full speed is very little...

More than 500 interaction events recorded since 2020, 28 damaged ships, three sunken. The spike in aggression towards boats is a recent phenomenon. A female orca called "White Gladis" may have a grudge after being left nearly-dead after the collision with a boat or entrapment during illegal...

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 rig sailing catamaran. I estimate the all up weight including 3 crew to average about 40% heavier than the Nacra 17. Nacra 17 foils: Nacra 17 MKII...

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 only briefly. It is my understanding that the single component, of a vessel, that determines whether or not it is required to be registered, is the...

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 run of research I am equipped with all necessary tools and have my friends welding shop to build my stainless steel plate and rod assembly. I am...

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 use a cassette quarter rudder similar to that shown by Gary Dierking (after Michael Storer etc). Instead of using two posts, one above the other, for...

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 around the hull section where the rudder shaft drops down through the hull. The round seal looks to suffer a lot of deep rust internally. The...

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 control strokes, so that I can go back to two bladed paddling under difficult conditions without much lean? A few days ago I had a lot of trouble...

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 expected heel angle (IE 20°) and establish an ideal value for lead, then size rudder area (projected on the heeled plane) based on said lead. I am...

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 old wooden rudder rotted out and was thrown away a long time ago. There is a large steel bushing/bearing welded to a projection of the skeg, and two...

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

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 rebuild as is, but I would prefer a full skeg that is much harder to foul on lobster pots. (The hinge between skeg and balancing portion of rudder...

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 Mass where I Live on a cradle (also for sale). She needs a little restoration. If you have the time and talent take it all away for short$ Needs a...

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 of thumb for how long long the rudder post should be inside the blade (like precentage of blade lenght)? Thanks Mikael

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 coaster yesterday. Rigging and Sails were both acceptable and not noticeably spent. My only real problem with her was the weather helm. I found that...

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 the boat since it had to follow the shape of the rudder profile with a variable offset along the length of the stock. The stock laminate is thickest...

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