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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Modified rig and hull?
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Topic Review (Newest First)
03-24-2009 08:53 AM
kwaltersmi
Quote:
Originally Posted by SJ34 View Post
...So maybe the spade rudder is the modification.
I know for certain that the Cal 36 came from the factory with a spade rudder. The fin keel, spade rudder and relatively light displacement were somewhat novel ideas for boats (Cal 40 & 36) touted as "ocean racers" in the 1960's.
03-24-2009 02:12 AM
SJ34 Actually, now that you mention it, the very first Bill Lapworth design (the Lapworth 32) had the rudder on the back of a keel that looks very much like what became the Lapworth signature keel. So maybe the spade rudder is the modification. My friend has talked about replacing the keel hung rudder with a later spade but thought better of it. "42 Street" is Lapworth 32 hull #1 and is in bristol condition.
03-23-2009 12:21 PM
Fstbttms
Quote:
Originally Posted by SJ34 View Post
That trim tab was obviously installed by a tuner (somebody who is always looking for improvements on a design, sometimes for a specific sailing condition).
I don't believe this is the case. I have seen at least one Cal boat with the same trim tab and have heard anecdotally of others as well.
03-23-2009 09:47 AM
SJ34
Cal 36

Firstly, I would love to have a conversation with owner of the boat. That trim tab was obviously installed by a tuner (somebody who is always looking for improvements on a design, sometimes for a specific sailing condition).

Secondly, the twin headstays also allow headsail changes without going bare headed.

Thirdly, my Cal 25 had the same rudder issue. The 25s rudder has a foam core, and a very light glass mat/gelcoat skin. I removed all of the flaking skin, soaked the foam with penetrating epoxy, filled with micro balloons and faired the rudder to a proper NACA foil then re-skinned with 6oz fabric and epoxy. No problem, but I'm a bit of a tuner myself and enjoyed the project.
03-22-2009 02:31 PM
Fstbttms
Quote:
Originally Posted by JohnRPollard View Post
...my hunch is that the keel-hung rudder is intended as more of a trim-tab arrangement...
+1

That's exactly what it is.
03-22-2009 01:11 PM
celenoglu Double headstay means two genovas for downwind sailing. Another common usage is hoisting a smaller or larger headsail to the second one and removing the already hoisted one. During this operation one sail will be always covered with the second one and will be easier to work. This might request a second genova car on your genova track or a completely seperate genova track.
03-22-2009 01:07 PM
bluwateronly Those cracks look like something I found on my Ericson26. Was not a deal breaker for me. I dropped the rudder and peeled of the gelcoat and found the cracks were just in the gelcoat. I put a few coats of resin and primmed and bottom painted it and was fine. You don't see rudder in the water so gelcoat removal was no big deal to me. I used a grey primer that was made to make the bottom paint stick to the resin. That setup by the prop looks like, don't know what it's called, but if it moves is used to helps steer the boat.
03-22-2009 01:02 PM
JohnRPollard Kwalt,

Interesting stuff.

I can't say whether it's original to this Cal, but the double headstay is not unheard of in my experience. In fact, I've seen and heard of a fair number of boats so configured (generally not of modern vintage though). It serves several purposes, one of which is simply to have a redundant headstay. The other is to allow two headsails to be hoisted and poled out simultaneously, as for long legs of downwind sailing in the trades. (Today you could do that with a twin-groove furler extrusion, but you still don't get the redundant headstay and it won't work for traditional hank-on sails).

The twin rudder arrangement is more intriguing. I have no first hand knowledge on that, but my hunch is that the keel-hung rudder is intended as more of a trim-tab arrangement, possibly as an attempt to improve windward performance, but also maybe simply for long trade-wind passages that require less rudder input when pulled downwind by those twin headsails?

Finally, that spade rudder sure does look like it needs some attention.
03-22-2009 01:00 PM
sailingdog That rudder is shot... and probably a deal breaker.

However, it really depends on the condition of the rest of the boat and what the price is. If the rest of the boat is solid, which I doubt based on the rudder, and the price is low enough to compensate you for the time, cost and aggravation of replacing the rudder, then it may not be a deal breaker.
03-22-2009 12:47 PM
kwaltersmi
Modified rig and hull?

I've been looking at a few used boats recently and came across an interesting 1968 Cal 36 on Saturday.

First, this Cal had twin forestays (no furler) that were side-by-side. I've obviously seen two forward stays on a cutter-rigged boat, but I've never seen to forestays side-by-side at the bow. I'm pretty sure this Cal wasn't rigged like this from the factory. Anyone know the purpose of the extra stay?

The boat also had two inline rudders (see picture below) and two inline tillers. Again, all of the Cal 36's I've seen in the past only had one spade rudder while the Cal I looked at yesterday had an additional rudder attached to the back of the fin keel with a prop aperture. The tiller for this rudder was almost entirely under the primary tiller and could be secured in place with a series of horizontal notches in an aluminum strip mounted to the cockpit floor. What's the purpose of the the second rudder/tiller? Anyone ever seen this set-up?



While the boat interested me as a spacious cruiser with good sailing attributes, I believe the spade rudder needs to be replaced. There is a menacing crack along boths sides. From the picture below, am I correct in thinking this is a deal breaker?




 
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