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Hi I want to try and build a new rudder for a 28ft sailboat. Current rudder has core damage and delamination - not too hard to fix, probably will fix it but I thought I will try to make a better rudder than the stock one. Current rudder is very fat - about +5mm extra material on rudder tube...

Wondering if anybody has tried adding something like that to cruisers? Many extend their aft to get some extra LWL length + access to water. Why not add foldable trim tabs to a sailboat? Some extra feet but no extra mooring cost?

Just an idea of using trim tabs for auto balancing when sailboat is moving and creating better planing characteristics downwind.

What about trim tabs? Similar to power boats using at stern? Also I found quite a lot of high end racing boats are using additional foils. Here is a good set of underbelly pictures - Homage paid to Alex Thomson's "keel walk"...

Motorboats have different foils that can be added to outboard motor or trim tabs. Do sailboats have any similar options? Adjustable trim tabs would probably enhance downwind performance probably - no?

Ill try to make a test run next month. Sanded, cleaned, filled and painted the whole hull from outside and inside. That old boat had so many layers of bad paint on it. Heavy work. But fiberglass showed no cracks and strong.

I have a strange boat here. No good picture of the underside. But it has lifting strakes and sharp chines that angle down. Is it a proper planing hull? But it has a 110mm x 70mm rectangular cross section keel underneath. Pictures here...

What are A and O books about boat design that a starting boat design student should read. -> ordering some books soon :D so help if you can.

I wanted to know peoples personal experience about renting boats and what they thought was the best, coolest, most fun boat they have rented, used. So again. What is the most fun rental boat you have rented? :D

Dude, if you want to build wooden bath then Dont use any chemicals to "waterproof it". There are many reasons not to do this: - bad for your health! -looks bad! -wooden barrel expands when you put water in it, so it fills the gaps. Me and my friends use this kind of barrel every...

Sorry, miswrote the question - what boat you have seen, was the question.

What is the best rental boat for tourists, boat that tourists take and use bythemselves? I mean a boat that offers more activities than cruising around:rolleyes:

I was wondering, looking at pedal powered boats with propellers. Why put a propeller that might get stuck in grass and greates a lot of drag (not the propeller but the suporting contruction of it) - has anyone tried to but the propeller inside the boat - a water jet :?: :idea:

Where are the foils? :)