Rotten Rudder

9 years ago
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cisco
cisco
QLD
12365 posts
QLD, 12365 posts
27 Oct 2016 11:33pm

No not rotten. Just a second case of worms due to the repairs not done properly last time.





















Fortunately the rudder and skeg are made from laminated timber which appears to be meranti or similar. Worms wil not cross laminations so the infestation is fairly isolated.
cisco
cisco
QLD
12365 posts
QLD, 12365 posts
28 Oct 2016 12:23am

I have taken the rudder off and sanded it back to bare timber. It is not too bad wit only two small infestations. One on the trailing edge and the other at the bottom below the pintle.

The skeg is another matter which requires removal of the last repair piece which is an Oregon piece 80 x 80 x 1800 mm. Boy you should have smelt it when I chopped the bad bits away.

The hull moulding has a slot in the transom for the skeg to go into and then through bolted. Magic yachts these Lotus 9.2s. Designed by Alan Wright and superbly built by Lotus Yachts in N.Z.

It will be repaired with two 40 x 80 mm pieces of meranti rather than a single 80 x 80 piece and the rear edge will not be concaved to fair to the rudder. The reason it got worms is because the concave part could not be painted properly. To reduce turbulence between rudder and skeg I will attach a rubber/neoprene flap over the gap between them.

When they have both been repaired they will be fully fibre glassed over preventing any further worm infestations.















This is the rot I cut and chiseled out. Virtually honeycombed by worms.



The old repair piece removed.







This shows the concave rear edge which the repaired skeg will not have. The gap between rudder and skeg was only about 5 mm and impossible to paint properly.



I cross cut it at 50 mm saw depth and then used the planer on it.




You've gotta love these Ozito tools. You buy them for $50 or less, work the hell out of them and if you bugger them up or burn them out, take them back to the Green Shed and they give you a new one.



More pics and talk tomorrow.


HG02
HG02
VIC
5814 posts
VIC, 5814 posts
28 Oct 2016 4:02am
Looking forward to it Cisco Ozito rules
keensailor
keensailor
NSW
702 posts
NSW, 702 posts
28 Oct 2016 4:13am
yeah I just dismantled an awning out the back made from hardwood beams, took the Ozito planer (same as Cisco's) to them and they look a million bucks.

BTW, good luck Cisco, keep us updated with photos, will be interested to see how new rudder / skeg progresses.
Pit Pony
Pit Pony
NSW
21 posts
NSW, 21 posts
28 Oct 2016 1:21pm
Great pics Cisco. Will enjoy following your progress.
PhoenixStar
PhoenixStar
QLD
477 posts
QLD, 477 posts
28 Oct 2016 1:42pm
Suggest you use vinly ester or epoxy on that one cisco and see if you can get hard meranti - the soft stuff is like wheetbix.
Yara
Yara
NSW
1322 posts
NSW, 1322 posts
28 Oct 2016 4:33pm
Just wondering why you would not use marine ply? I rebuilt my Bluebird rudder with ply, and it was excellent. Had to do a bit of lamination with epoxy to get the thickness/shape, but it was easy. Better resistance to worms?
cisco
cisco
QLD
12365 posts
QLD, 12365 posts
28 Oct 2016 8:43pm
PhoenixStar said..
Suggest you use vinly ester or epoxy on that one cisco and see if you can get hard meranti - the soft stuff is like wheetbix.


Am planning on coating with Everdure and then my mate the best glasser in town will probably glass it with chop strand mat. I will leave that all up to him.

I got some meranti today with a bit of red in it so should be from the heart of the tree.

Yara, I am using meranti because that is what made from. It is 80 mm thick and about 250 mm wide. I would be there forever using ply. It will be fully glassed over so I don't think there will be any more worm problems.
AshleyM
AshleyM
QLD
197 posts
QLD, 197 posts
29 Oct 2016 12:34am
I hope your mate doesn't use choppy on your rudder if you are sealing it with everdure.
boty
boty
QLD
685 posts
QLD, 685 posts
29 Oct 2016 7:32am
Yara said..
Just wondering why you would not use marine ply? I rebuilt my Bluebird rudder with ply, and it was excellent. Had to do a bit of lamination with epoxy to get the thickness/shape, but it was easy. Better resistance to worms?


never use ply in a rudder 50% of the grain going the wrong way always laminate timber depending on type of boat and rudder loads depends on what timber to use we normally favor combinations of crows ash (hardwood very stable glues well ) Australian cedar light weight hardwood stable good durability glues well though i wouldn't be keen on meranti (low durability often brittle ) if timber selectedwell and sheathed with a coupel of layers of 450 bi axial it should be fine
love the lotus yachts
cisco
cisco
QLD
12365 posts
QLD, 12365 posts
29 Oct 2016 9:39pm
boty said..


never use ply in a rudder 50% of the grain going the wrong way always laminate timber depending on type of boat and rudder loads depends on what timber to use we normally favor combinations of crows ash (hardwood very stable glues well ) Australian cedar light weight hardwood stable good durability glues well though i wouldn't be keen on meranti (low durability often brittle ) if timber selectedwell and sheathed with a coupel of layers of 450 bi axial it should be fine
love the lotus yachts


The worm ridden piece I am told was Oregon and I was also told that is one of the worst timbers to have below water level.

Maybe you can tell what the original timber is from these two pics. It looks very much like meranti but the grain seems tighter.








I didn't get a heck of a lot done today due to feeling buggered when I got up, shopping for Epiglue and a visitor distraction. The skeg is 80 mm at it's thickest and I need to make up about 73 mm on the rear for correct width. Meranti comes in 42x93 and 32x93 so I bought a piece of each 1900 mm long and another piece 42x68x700 to replace the bit to be chopped off the front edge.

First job was to cut the two 1900 pieces down to 80 mm wide which was accomplished with two saw horses, a clamp and the Ozito saw with it's adjustable fence. I did not trust the graduations on the fence so I set it using my steel rule which was just as well, otherwise I would have been 1.5 mm out.







cisco
cisco
QLD
12365 posts
QLD, 12365 posts
29 Oct 2016 10:01pm

The text editor is playing up again like yesterday by not doing space bar commands so I have a new post. It seems to happen after posting a few pics. Anybody else had that problem??

The new timber pieces are going to be epoxy glued and screwed with S/S batten screws. There will be a dry fit up first with drilling for the screws and the timber will be clamped in place for drilling. In order to get a good clamping it needs a flat surface both sides and the whole process needs to be sequenced in the right order as well. That meant the next thing to do was cut the wormy bits off the front edge. I was advised to scarf the new pieces in with an angle at the join so I have cut them out at 45 degrees.

Rotten front.



No more rotten bit.



Hopefully a lot more progress tomorrow.




andy59
andy59
QLD
1156 posts
QLD, 1156 posts
30 Oct 2016 5:49am
Have to agree with Boty it would be a shame to do all that work and sheath it with chop strand.
Double bias or biaxial cloth will do justice to all your hard work
Ramona
Ramona
NSW
7756 posts
NSW, 7756 posts
30 Oct 2016 8:54am
My fishing vessel is 71 years old and all Oregon planking [I sold it about 10 years ago]. The planks were immaculate when I had her. Now she is back here in town after residing up in Nowra for a couple of years near the river bank and has some Gribble attacks where the paint was scraped off. That looks like Gribble on your rudder blade too. Gribble is just natures way of clearing drift wood. I too would use epoxy and cloth and steer clear of fibreglass over timber.

All those Navy 40 footers you probably had the pleasure of riding about on are Oregon.
cisco
cisco
QLD
12365 posts
QLD, 12365 posts
30 Oct 2016 10:32pm
andy59 said..
Have to agree with Boty it would be a shame to do all that work and sheath it with chop strand.
Double bias or biaxial cloth will do justice to all your hard work


Which is what my fibreglass guy said we would be using with epoxy resin.

Today I got the two planks screwed and glued onto the skeg. Now it looks like there is a bow in the skeg. I think it is just the camera angle and that there is a bunch of material to be planed off the planks to fair them to the original.



First plank dry fitted and screwed.



Second plank dry fitted and screwed with the screws offset half way between the screws in the first plank



Both planks screwed and glued with slots for the pintles cut ready to be chiseled out.



Both planks screwed and glued and Naala the lion dog being freaked out by sand flies or March flies.



It looks very much like there is a bow in it. The second plank did have a bit of warp in it so I hope it is not causing a bow in the whole thing. We will know more tomorrow. They say that every boat sails better on one tack than the other.

The prop shaft can't be used as a reference point as it is offset to allow for it's removal and I assume it is on that side to counteract prop walk. It works because this boat tracks straight as an arrow in reverse. I just hope the three rudder pintles are going to line up.


samsturdy
samsturdy
NSW
1659 posts
NSW, 1659 posts
31 Oct 2016 9:17am

Definately looks like a bow Cisco. Needs a straight edge run up it to see how much.

If it is bowed Cis, what will you do about it ???.
keensailor
keensailor
NSW
702 posts
NSW, 702 posts
31 Oct 2016 1:47pm
why has it bowed the original skeg
cisco
cisco
QLD
12365 posts
QLD, 12365 posts
31 Oct 2016 7:19pm

I checked it today and it is just a quirk of the camera. Thank God for that.
HG02
HG02
VIC
5814 posts
VIC, 5814 posts
31 Oct 2016 8:34pm
samsturdy said..

Definately looks like a bow Cisco. Needs a straight edge run up it to see how much.

If it is bowed Cis, what will you do about it ???.


Im not sure what there on about Cisco the internet down here makes it look straight as a Dye Maybe there still on Abbots copper wire
Wander66
Wander66
QLD
294 posts
QLD, 294 posts
31 Oct 2016 7:56pm
Perhaps it's part of the Pogo-fication of Second Wind?
HG02
HG02
VIC
5814 posts
VIC, 5814 posts
31 Oct 2016 10:09pm
Wander66 said..
Perhaps it's part of the Pogo-fication of Second Wind?


I think Cisco's Camera may be on the Rum .
It might be a Gene problem and second wind might be growing a second Rudder
samsturdy
samsturdy
NSW
1659 posts
NSW, 1659 posts
1 Nov 2016 9:30am
cisco said..

I checked it today and it is just a quirk of the camera. Thank God for that.



Well that's good news Cisco. Like HG says, maybe your camera's on the rum.
And yes HG, we are still on Abbots copper wire.

cisco said..

I checked it today and it is just a quirk of the camera. Thank God for that.
nebbian
nebbian
WA
6277 posts
WA, 6277 posts
1 Nov 2016 8:41am
While you're straightening that skeg, you might want to straighten those acroprops as well. Funnily enough they're all bent the same way.



I've heard of fisheye effect before, but never a camera effect that warps the image like that. Strange.
samsturdy
samsturdy
NSW
1659 posts
NSW, 1659 posts
1 Nov 2016 11:52am

Good observation Neb. Yes, the props are all leaning the same way.
cisco
cisco
QLD
12365 posts
QLD, 12365 posts
24 Nov 2016 1:04am

Bit of an update on the progress of Second Wind's "Big Birthday". According to the projected work schedule, she went back in the drink last Thursday. I wish. If I get her wet again this year I will be doing well but I am not counting on it.

I have paid up for outs, ins, set up of travel lift, set up in cradle, water blast, EPA fee and one month hard stand working totaling $2,100.

With that kind of outlay I certainly do not want to have to do more than a quick slipping for anti foul for the next 5 years. That in mind and the cost of $200/week hard stand working, I don't mind paying for whatever time it costs to get everything right.

The major problem has been the worm infestations in the skeg and rudder which is not the first time and the owner who had it fixed last time was too lousy to get the job done right and encase them with fiberglass. It is being done this time so that it will never be a problem again.

This is the pile of rubbish I chopped out.




Those worm holes are 10 mm round.





Block filled with meranti. Not a problem because it will be glassed over. I was told by someone who should know that the original timber is western red cedar. That makes sense because it bled red in the recent rain.





Here it is all faired up with it's first glassing. The leading edge will have 2 or 3 layers of glass and yes it is double bias cloth with epoxy resin.





The rudder the same but one layer all over.




The keel also which I sanded back to bare lead. I bought a new respirator for that job. Everything below the waterline of boats is toxic so if you are working on a boat make sure you have a good respirator (forget the paper masks) and good eye goggles. Even with good goggles I still had to spend 6 hours waiting at the hospital for a doctor to remove a paint particle from the cornea of my eye.








From those two pics and a couple to follow you will see evidence that Second Wind has been involved in ground wars. As Donald Street said "You haven't been sailing if you have never been aground."









Look at the bow. She hasn't just grounded the keel. She has been on the rocks or rammed something big time.

Apart from her internal creature comforts and brilliant ergonomics of moving about on the yacht, another thing I am gaining the love of with this yacht is her under water shape. If you look closely at the following pics you should see just a slight concaveness in the bow before she shapes out to her belly. Then her lines are fairly straight until they taper up to the rudder which is well aft of the keel giving huge steering leverage making the helm as light as can be.










I will power this yacht up and get her on the plane.

You will notice some isolated osmosis spots in the pics. Chiseling them out exposes green fiber glass. Seeing that my glass guy asked "Is this boat built in NZ?" Yes I said and he said that is the good shizz.

While she is out and getting a big birthday, previous faults exposed and method and thoroughness of repair apparent, I figured is a good time to get a proper hull and rig survey done so I rang Drew Sayer of Fore and Aft Surveys www.foreandaftsurveyors.com/ who operates in SE Qld. He knows his stuff and his quote is $450.

So I am talking with him on the phone and say the yacht is a Lotus 9.2 and he says I used to race one of those back in Kiwi back in the day and they are a great yacht. How good is that??

That is all I have for you tonight. I hope some gain some insights into this insanity of yacht ownership and decide to stay away from it and further depress the second hand yacht market.















cisco
cisco
QLD
12365 posts
QLD, 12365 posts
18 Dec 2016 10:27pm

Being a "Big Birthday" for the yacht one has to do all that should be done so that the next slipping will only be necessary for a bottom clean and re-anti foul which dictates that all skin fittings and sea cocks should be removed, refurbished or replaced and refitted.

My head suction cock and vanity drain cock are located in the vanity cabinet and only allow one twelveth of a turn of a spanner or Stilson wrench and proved to be un-screwable from the inside of the hull. The only way to remove them was by destroying the outside flange with a grinder and cutting wheel which I did resulting in the need to replace them.

They are all bronze which I suggest is the only acceptable material for skin fittings even for steel yachts. The head outlet was not restricted overly but also proved to be immovable. I have probably spent over $200 on bronze fittings and cocks but well worth the expense.

This is they ready to be fitted which they have been since.




Left to right are the head outlet, head inlet, vanity drain and the stern gland. Top row is the engine inlet, galley sink drain and the stainless exhaust outlet replacing the plastic piece of crap. All of the bronze fittings inside have been smeared with Lanotec grease to seal them from developing the green verdigris.

The black fitting on the right is the Raymarine housing for the Raymarine i40 speed transducer which I decided to go with rather than blanking off the hole left by extracting the poxy VDO Sumlog housing. The instrument and transducer I bought from Whitworths at Mooloolaba which is the best stocked Whitworths shop I have been into. Cost about $450 with a bottle of the antifoul for the paddle wheel.

I had to enlarge the existing 35 mm hole to 51 mm. This was achieved by borrowing a quality hole saw set from my mate and screwing a 51 mm saw onto the mandrill and a 35 mm saw inside it to be a guide.

For sealing the skin fittings I have used Bostic polyurethane roof and gutter sealant which is as good as Sikaflex but half the price. Available at Ken's Plumbing.

The hull having now been fully sanded back to gel coat, faired and filled where necessary, it is nearly ready for priming, hi-build, re-fairing and anti fouling.

Before one does that though everything above the waterline except polishing needs to be done such as acid washing and buffing of cabin top deck and top sides. That was today's job. The weather has been so stinking hot and the sun so fierce that there are only two times of day to get anything done, 5 am to 8 am or 3 pm to 6 pm. I am not a morning person. When I am on the job though, I excell.

The product I used is Sun Chem Industrial Fallout Cleaner which come from Gympie in Qld and is a good cleaner. It has a fairly high content of Oxalic Acid which is what you need to bite into gel coat. It has a fair content of detergent in it also which took me a few rinses to get rid of. My top sides had some fairly bad staining and this undiluted got most of it off. Straight oxalic will remove anything but be careful with it. Wear goggles and gloves.

The before and after results of my efforts today.












HG02
HG02
VIC
5814 posts
VIC, 5814 posts
18 Dec 2016 11:32pm
Boat Cisco Boat
Ha Ha

Good stuff mate
ChopesBro
ChopesBro
351 posts
351 posts
22 Dec 2016 11:19am
I still can't help myself and truly someone has to say it


Crisco....nice cocks....very nice cocks indeed
HG02
HG02
VIC
5814 posts
VIC, 5814 posts
22 Dec 2016 6:12pm
ChopesBro said..
I still can't help myself and truly someone has to say it


Crisco....nice cocks....very nice cocks indeed


you on parole or day leave chopes bro
ChopesBro
ChopesBro
351 posts
351 posts
23 Dec 2016 11:42am
I am no longer a guest of the french government and its wonderful hospitality and have secured a dubious passage home.

Lets just leave it at that
southace
southace
SA
4803 posts
SA, 4803 posts
23 Dec 2016 6:56pm
How long does it take for the worms to do that damage CISCO? Do you think they where there before you brought the boat or arrived recently?

I had a timber 1926 yacht in the Hawkesbury river nsw not a sighn of worms although she was sheathed in epoxy skin. Was there no glass on the rudder/skeg?
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