Showing posts with label clamps. Show all posts
Showing posts with label clamps. Show all posts

Friday, November 17, 2023

Bahamas Dinghy HENNING Mast Repair

17 Nov 23:

HENNING came with two masts, the original mast is split along a scarf line right around where the boom jaws would sit. There is also a bit of rot there, most likely from corrosion where an old fitting would have been, a downhaul cleat possibly. The wood appears to be fir, based on what we see, the weight and what was commonly used. The scarf shows no remnants of glue, it probably soaked into the wood and dried up decades ago. Whether there is a "There I Was" Sea Story to go along with the split, we don't know, but we'll make one up as the restoration progresses. 


Skipper's fleet of Gorilla Carts were called into action to act as mobile workstations, which meant I needed to air up some tires, which meant one tire's dry-rotted valve stem gave up the ghost, which meant I had to find the spare, which meant that the spare hub didn't fit the axle for some odd reason, which meant a spare needed to be ordered, which meant order two in case they are a little different size, which meant scratching my head as to why Gorilla Carts don't sell their own tires on their website, which meant crossing fingers to hope the ordered parts would fit...Spoiler Alert...The spare fit.


We used TotalBoat THIXO PRO thickened epoxy adhesive to reglue the mast. PRO refers to the larger two tube system of THIXO, industry pros who use a LOT of adhesive can save some money and time by buying THIXO in this configuration and using the special High Thrust caulk gun to dispense the thickened resin and hardener. Single tubes are available that fit regular size caulk guns, but if you go that route be sure to buy a High Thrust 25:1 ratio or similar gun vs the basic level 7:1 cheapo gun.


To get THIXO into the small crack at the end of the scarf, we squirt some THIXO into a small plastic syringe, sold by folks like TotalBoat or West System, and use the syringe to inject epoxy as far into the void as we can. Then we hope that light clamping pressure distributes the adhesive throughout the joint.  Only light clamping is needed, just enough to see "squeezeout" along the joint line, to ensure the joint is filled. And when clamping raw or dry wood, avoid the urge to wipe off excess, as the wood will soak some of that epoxy back into the joint. 


The split scarf was about two feet long, but we added a clamp every foot or so to hold the mast level along the forward face. We used all of our Jorgensen clamps, which are named for family and friends. Richard, Webb, Doug, Alan, Murray and Hazlewood are friends who are exceptional Mariners, as well as serial boatbuilders, serial circumnavigators and serial sea story tellers. Hazelwood was Capn Jack's friend, he helped Capn Jack build his first sailboat in the 1960s, a 16 foot Petrel. Skipper watched, fascinated by the thin shavings that curled off of Hazlewood's plane and the thin wisp of smoke from his cigarillo. Skipper was then pressed into service puttying all of the screw holes with her little fingers, peeling off a layer of skin or two in the process. Unfortunately the fingerprints grew back, spoiling her potential career as a bank robber. 




Tuesday, July 19, 2022

Clamps

 19 Jun 22:

Your daily dose of clamps. We got these spring clamps from Howie, who worked at Alcort from 1960-1978, and then did warranty repairs for another 10 years. He taught us a lot about the innards of the Sunfish and Sailfish.



Friday, June 24, 2022

Nutshell Pram EXCUSE ME 24 Jun 22 Making the Mast

 24 Jun 22:

The Nutshell Mast is 8' 5" long, and the widest diameter is just above the base where it flares to 2 3/8". The bulk of the mast is 2 1/8" though, so we decided to make the blank 2 1/8" and save on some carving. It should be plenty strong, as a comparison our Sunfish mast is 2 1/4" diameter and it carries 75 square feet of sail, twice that of the Pram. We just have to remember down the road to cut the mast thwart hole to 2 1/8". 

We cut 2 pieces to length, then ripped them 2 1/8" on one side and 1 1/16" on the other. For adhesive we used TotalBoat THIXO Flex dispensed from their 2 component epoxy resin and hardener cartridge in a 25:1 High Thrust Caulk Gun. 2 beads of epoxy per face then we spread it with a paint stir stick to ensudre full coverage.



We laid down some plastic sheet to keep the mast from sticking to the floor, a little of the plastic stuck to the epoxy though, not an issue as it will be sawed or sanded off. Poly sheet would work better. We clamped the mast every foot or so and used the plywood floor edge line as a visual guide to make sure the mast blank is mostly straight


When tightening clamps a small amount of epoxy squuezeout should be seen, then it is time to stop clamping, the thickened epoxy has filled gaps at this point. Any further clamp pressure could force epoxy out of the joint. Plus as the wood absorbs the epoxy some of that small bead will be drawn back into the seam.


Here is a small spot where no epoxy squeezed out, so we later added a dab of epoxy with the caulk gun.


 


Sunday, February 6, 2022

Nutshell Pram EXCUSE ME Forekeel TotalBoat THIXO Epoxy and Lamination Tips

30 Jan 22:

We worked on the forekeel today for EXCUSE ME, but first a couple of close up photos of the midships frame clamped and drying.



Here's a photo of the fir strips that will be used.
 

The blocks that are used to form the inner curve of the keel.



Here's a video on the materials and techniques we used to laminate the frame and forekeel.



We used a paint stick to spread out the thickened epoxy onto both faces of the fir strips. This ensures full coverage when the strips are clamped together.


All 15 strips epoxied together, ready to go onto the clamping jig.



The first two clamps are the hardest, an extra pair of hands is useful to control this octopus. 


Every clamp or two it is important to makes sure that the strips are laying flat vertically. We take a scrap piece of 2x4 and press down from the top, tighten the clamps and move on to the next few clamps. 

Here's a few tips on lamination: 

Video link: https://youtu.be/7OZ_1mz2qFA

The jig was then taken inside the house to dry in a climate controlled, 72F space. 

Log of EXCUSE ME.

Tuesday, January 11, 2022

More Clamps

11 Jan 22: 

We added 4 more clamps, dedicated to our friends Doug, Murray, Richard and Webb. They are all deeply honored. Richard, an ENglish citizen, claims it is an honor greater than knighthood.


We are deeply honored to know these Mariners, they have just a few sea stories to tell. 

Sunday, January 10, 2021

1982 AMF Sunfish PHOENIX 09 Jan 21 Deck Repair

 09 Jan 21:

Removed the clamps and we have a little excess epoxy to trim from the seam.

Trimmed the large blobs with a bi metal blade on the DeWALT oscillating multitool and finished up with 120 grit on a DeWALT 20V random orbital sander.



Chine is watertight now, needs some fairing compound and sanding.



Used TotalBoat THIXO thickened epoxy to fasten the deck piece to the backer plate and hull flange.



Clamps for the seam, they are vintage, used at Alcort and AMF 1960-1978 by our friend Howie. He sent them to us about 10 years ago along with tips on working the hull flange seam, example, the paint stir sticks along the edge of the deck are there to help distribute clamp pressure evenly. For the deck seam we put a strip of poly down to smooth out epoxy, placed a piece of salvaged fiberglass deck over that to spread out pressure of the sandbags.


Wednesday, December 9, 2020

1965 Alcort Sunfish WAVE 09 Dec 20 Deck/Hull Seam Adhesive

09 Dec 20:

Sandbags off, deck shape looks great.


I should let Skipper order fabric, she knows what she is doing and I MIGHT have over-ordered. 5 square yards of 6 oz fiberglass cloth and about 12 square yards of woven roving. Might be able to build another boat.


Jamestown Distributors sends out these nice mixing cups, and we highlight the ratio we are using so we can find the right column easily while pouring. Today it was 5:1 Epoxy. Resin to Hardener. Ignore the last 1.


We used Great Stuff expanding foam to adhere the top front of the structural blocks to the underside of the deck. It will work fine as long as we don't let water fill the hull for extended periods, it is not closed cell and would eventually absorb water. We used it here because we didn't want to split any more seam than was already split, and the deck could only be raised so high.


Put down a bead of THIXO Wood thickened epoxy then laid a one inch wide strip of fiberglass cloth. The cloth helps distribute and hold the epoxy in the seam, a tip given to us by Howie, who repaired built Sunfish for 18 years at Alcort then AMF, and then did another 10 years of warranty repairs.


Skipper wet out the cloth with TotalBoat 5:1 High Performance Epoxy


We used a syringe to inject thickened epoxy into the deck/hull seam when the gap got small.



New adhesive to fasten Capn Jack's bow handle stainless repair plate to the deck, that was his fix to where a previous bow handle had torn off and left a hole in the bow. We added a strip of fiberglass cloth to act as a catch basin for a THIXO blob, that will fill and seal the hole. Just to confuse you I have the stainless plate turned around facing the wrong way.


Hmmmm, Float Test or fairing and sanding next? Maybe an air leak test...



Alan sent WAVE and PHOENIX some bow trim.


WAVE's peeking outside...


Friday, June 5, 2020

1953 Alcort Sunfish ZIP 03 Jun 20 Letterbox Plug Repair

03 Jun 20:

We cut out the plug from 1/4 inch thick AB marine grade plywood. The masking tape was used to make the pattern, and we cut the plug a little big so we could sand fit it to final shape on ZIP.




The backer plate had to be cut into 4 pieces to fit around the internal stringer and frame.


We used TotalBoat THIXO Wood to fasten the backer plates to the inside of the hull. THIXO is a 2 part thickened epoxy and hardener that comes in a caulk tube and mixes in the mixing tip. A 18:1 High Thrust caulk gun makes disoensing the product easier.


Lots of clamps with light clamp pressure until a small bit of epoxy squeezeout is seen. Too much clamp pressure can squeeze all of the adhesive out of the joint.



Clamp video: https://youtu.be/2KFFkbzn2Sc



Even though it is a different piece of plywood, we are trying to keep the grain running the same direction on the patch as the it is on the deck. We marked the grain on ZIP onto a sheet of poly, then moved the poly over to the plywood sheet to align the blue tape pattern with the grain on the plywood where we would cut the plug from.


Skipper's new DeWALT 24V XR cordless jig saw, wow it is nice! More on that tool later.


We cut the plug just a little outside the pattern line so we can do the final shaping on the boat.


Log of ZIP.

Tuesday, September 26, 2017

AMF Sunfish Viper Deck Seam Repair 26 Sep 17

08 Apr 2015:
We rounded up 2 Sunfish built by AMF's Alcort Division. "Viper" is a 1980 boat that had been holding down a piece of plywood at Coastal Marine Works (formerly Breezy Boat City) in Gulf Breeze Florida. A young man needing some cash had brought in the damaged hull to our friend Jan and he helped him out. The hull had most of the parts stripped, a damaged seam and unsightly fiberglass patches, so it took up residence on a piece of plywood behind the office. Jan sold the business to our friend Allen Pinkston aka "Viper" and we discussed the destiny of the hull several times. The good news was that with all of the holes in it, no water had stayed inside and saturated the foam blocks. "Viper" will get a Naval Aviation tribute paint scheme using VF-84's Jolly Rogers colors as inspiration.

From SBR 4: Jun 2014 -


"Sugar 2" is a 1983 boat that was doing an admirable job of leaning against a wall at ICC Marine in Gulf Shores, Alabama. She had most of her parts stripped as well and has a big hole in the bow. We bought her as part of a 2 1/2 boat deal from Jim and our friend Loxley brought her over when he came to pick up "Boo." The hull is actually in decent shape, just need a bath and small repair....and a lot of parts. "Sugar 2" will get a tribute paint scheme using S-2F Tacker paint as a guide.

From SBR 4: Jun 2014 -

Date Unknown:

Split the seam on Viper so we can access the inside for fiberglass repair. Added an inspection port hole forward of daggerboard trunk.

25 Jul 17:

Restoration resumes on Viper. Lots of old fiberglass patches to remove, used a heat gun to soften the polyester resin and then sanded smooth with 60 grit on a random orbital sander. Removed the cockpit trim by drilling out the rivets with a 1/8 inch bit. Removed old paint from the deck with 60 grit on a random orbital sander.


Viper needs a new backer block for the bow handle...and all of the other deck hardware as well.



The little loop is where the factory hooked up a strap to pull the hull out of the mold.



















26 Jul 17:

Well it took a heat gun running 1150 degrees F AND an oscillating multi tool to burn and chisel off the blob.


Surprise, there was a hole in the boat, with rotting pieces of wood inside...and a small fire, not to worry...


Removed excess two part expanding foam, it had oozed under the storage cubby. It us used to hold the white flotation foam in place, but you only need a little.


You are looking at the bottom side of the storage cubby. At the top of the photo is the white flotation foam that runs along the keel and under the tail end of the cubby, that will stay. The edges of the hull have been faired back in prep for fiberglass repair, all crushed, loose fiberglass has been removed. A backer patch of woven roving and cardboard will be installed inside the hull, then multiple layers of 4 oz cloth will be stacked in the hole, small to large pieces and the last few pieces will overlap the faired area. Fair. Sand. Paint (gel coat if you have the talent).


Waiting for a patch

That's two part expanding foam and the bottom of the storage cubby, some healthy looking woven roving!


28 Aug 17:

Made fiberglass backer patches, formed to the hull shape. Laid down plastic sheet first, then laid out the 4 oz fiberglass cloth and saturated it with thickened TotalBoat epoxy. Covered with another sheet of plastic to let it dry to shape. Once dry the patches will be epoxied inside the hull to form a base for additional layers.





26 Sep 17:

Laid a strip of 4 ox fiberglass cloth to reinforce the hull flange of the deck seam, bedded in TotalBoat THIXO thickened epoxy. Covered the strip with plastic and clamped while it dried.




26 Sep 17:

Laid a strip of 4 ox fiberglass cloth to reinforce the hull flange of the deck seam, bedded in TotalBoat THIXO thickened epoxy. Covered the strip with plastic and clamped while it dried.




to be continued...


Learn more about your Sunfish in The Sunfish Owner's Manual.