Showing posts with label fiberglass. Show all posts
Showing posts with label fiberglass. Show all posts

Friday, July 8, 2022

How To Clean Your Sunfish and Inspect the Holes

29 Jun 22:

What started off to be a very short video on how to clean and rinse a small boat with water and Dawn dishwashing liquid turned into more, much more. We spent a few minutes discussing gelcoat damage and the plethora of holes on the mighty Sunfish in the video that follows. 

But first a few photos...and a discussion about gelcoat and fiberglass. When the Sunfish is made the first thing done is a layer of gelcoat is sprayed inside a mold, the gelcoat becomes the outer skin of the boat, protecting the fiberglass cloth and resin that are applied next. "Gel Coat is a specially formulated two-part polyester resin that is designed to be the first layer of resin applied in a mold when making a polyester or vinyl ester composite part. It is intended to create an opaque surface which will completely block glass pattern show-through." Gelcoat is also moisture and UV resistant, and gelcoat makes a boat look good.

Gelcoat can be sanded and polished if it gets damaged, but it is only so thick, measured in millimeters. Here's a spot on PHOENIX where the gelcoat has been sanded through, the fiberglass underneath is starting to show through. And a bit of Sunfish trivia, the stripes are sprayed first, then the rest of the deck mold.


Here are two more spots. The fiberglass is fine underneath, and a spot touch up could be done if desired.


Here's a spot where the block has rubbed the gelcoat and left some residue, a good scrub will remove that.


Gelcoat shrinks with age, and small stress cracks can form. It is not a structural concern but if the cracks expose fiberglass then that area should be repaired. A common area to find these small "spider cracks" is in the cockpit, there are 8 blobs of adhesive that bond the tub to the hull, and years of folks getting in and out of the boat flex and stress the gelcoat. The fiberglass underneath is fine, which can be verified with an air leak test



Here's a gelcoat fracture caused by impact. The fiberglass underneath is still good, no leaks, but if there are bit of gelcoat gone and cloudy fiberglass underneath, the cloth/resin matrix is damaged and a repair should be made. These spots are routinely found on the corners of the boat, and if a sunburst shaped spider crack is found on the deck or hull, either the boat was dropped on something or vice versa. These areas can be gently probed with a finger or awl to make sure the fiberglass underneath is not soft, and an air leak test will confirm whether or not there is a leak.




PHOENIX just turned 40, she looks great. Wash your boat with care, for there are 30+ holes designed into the boat that can let water in, mentioned in the video. If you find damage on your boat that needs repair, post a comment and we can help you locate resources and materials to effect the repair.


And for more info about the World's most popular boat, check out The Sunfish Owners Manual

Saturday, December 19, 2020

1965 Alcort Sunfish WAVE 19 Dec 20 Shaping and Fairing

19 Dec 20:

Removed the clamps and shaped the seam edge with 40 grit on a Black and Decker belt sander. Dust collection with the Dust Deputy and ShopVac. 


Sanded the deck, sides and bow with 120 grit on a DeWalt random orbital sander.








Friday, December 4, 2020

1965 Alcort Sunfish WAVE 04 Dec 20 Jigsaw Puzzle Sunfish Style

 04 Dec 20:

Let the jigsawing begin. 2 decks to make one.


Skipper scribed the cut line for the new deck piece using a calibrated Sharpie.


I tried to talk Skipper into leaving this as the finish scheme, but she wants to paint the new piece to match.


We cut out the new deck piece then used it to draw lines for an internal backer plate.

The new deck piece will rest on the hull flange and backer plate. 


Aft section of backer plate fastened with TotalBoat 5:1 High Performance Epoxy, thickened with silica filler to peanut butter consistency.



Sanded the seam of the replacement deck piece to remove old polyester resin. 40 grit on a DeWALT 20 Brushless random orbital sander, dust extraction with the Porter Cable cordless wet/dry vac.


WAVE's bow fastened to the deck with THIXO Wood thickened epoxy. Why Wood? Because we had some. It is the same as THIXO but has wood flour added to better match wooden boat repairs. WAVE thinks she is a wooden boat now. Skipper used her rubber mallet to tap the bow piece back into position, we were able to mate up the fractured edges of the bow piece nad deck using the stripes as alignment marks. Dry clamped for now. PHOENIX waiting patiently for her turn, glad that WAVE is the guinea pig.


Fastened the bow piece to the backer plate with THIXO Wood light clamping. Sandbag is keeping the new seam flat, filled with QUIKRETE 50-lb Play Sand. It is important to use QUIKRETE 50-lb Play Sand because....you're still reading....For more info visit www.icantbelieveifellforthis .com


Backer plate epoxied, clamped and drying.


Bow refastened with THIXO Wood thickened epoxy. 



Sandbag to keep the seam flat.


While the epoxy is drying, we piered out another 8 feet.


The end is far away. And the cone.


New flag in the near future, we'll be able to get to it from the dock instead of the Sharknoe!


Friday, April 13, 2018

Alcort Catfish SMEDLEY 13 Apr 18 Hull Repair

13 Apr 18:

Family came to visit so of course they wanted to help flip SMEDLEY. Our plan is to start and hull repairs and get more of the rigging sorted out. We also need small repairs on one rudder and the mast, and gather a few blocks.

The hull has fiberglass damage from trailer rollers and a few other rash spots.







Log of SMEDLEY.

Tuesday, March 20, 2018

ALCORT Fiberglass Sunfish and Super Sailfish MKII Rudder Carriage Bolt Tube

20 Mar 18:

The fiberglass ALCORT Sunfish and Super Sailfish MKII rudder had a carriage bolt that could move around under sail and that slop allowed the vertical hinge plate to pop out of the bottom latch plate groove. AMF/ALCORT added a rubber tube over the bolt to help keep it centered in the middle of the transom slot. We recently came across a few spares. In 1972 the rudder design was changed to the current style.


Here's a picture of the tube installed on our Super Sailfish MKII SWEETNESS.


1963 Super Sailfish MKII SWEETNESS.



Have you ordered your copy of The Sunfish Owners Manual yet? Great information on the most popular boat ever built.

Fair Winds,
Clark and Skipper

Sunday, January 21, 2018

1980 AMF Sunfish SUGAR 2 21 Jan 18 Bow Repair

21 Jan 18:

Sugar 2's bow was damaged during its yacht club duties, repaired and damaged again! How do you hit something that hard, twice?


We pulled out the random orbital sander with a 120 grit pad and decided to sand off the old stickers and registration numbers first. Also cleaned up the bow handle area, but we went light on the gelcoat, we are trying to save it vs painting.

Before.


After. That bare spot was already there, not sure what caused that.


1980 Hull ID Number.


Sanded and diamond filed the damaged area to remove broken fiberglass. We also sanded off excess polyester resin and old paint.


Before we closed up the hull we rolled the boat over a few times to listen for loose backer blocks, we like to remove those when we can reach them. I heard one smaller block rattling around inside, and thought it might be the halyard cleat or fairlead block.


Sure enough, the halyard cleat was loose, held in only by the screws through the fiberglass. We'll go ahead and add an inspection port to install the new backer and check the fairlead block while we are in there.


We put in the bow backer block, made from cypress and coated in epoxy and fastened with Pettit Flexpoxy and the bow handle screws. We also rebonded the deck to the hull with Flexpoxy and a strip of fiberglass in the seam, pictures to follow of all the clamps that we used.




Restoration Log of Sugar 2.

Tuesday, June 27, 2017

Alcort Standard Sailfish and Super Sailfish Handrails

We ran across someone looking for a handrail for their Super Sailfish MKII, the fiberglass version of the 13'7" wooden Super Sailfish. The handrails are a pretty important part of this boardboat, as there is not much to hold onto while sailing. Here are the rails on our SS MKII.

From Small Boat Restoration 2013

Most likely there are not a lot of spare Super Sailfish handrails laying around, so I offered to make a replacement. We measured the rail at 3/4 inches thickness, 41 inches long and 1 5/8 inches tall. Most likely the originals were mahogany, for this project I chose red oak, because that's what Lowes had in stock, ready to buy. I forgot to measure the height before I went to Lowes, so I guessed, as it turns out I can cut 2 rails from this 48 inch section that is "4" inches wide (actually measures 3 1/2"). There are host of other woods that could be used, in the future we might make a few from cypress or ash.

From Small Boat Restoration 2013

For this rail I took the oak out to our SS MKII and traced the profile with pencil onto the wood. Then I came inside and checked some basic dimensions with a caliper, like how wide the screw bases were, how high the rail stood and how tall the cutout areas were. The pencil tracing was off a little along the top, so I marked off 1 5/8 inches then redrew a straight line using a straight piece of wood as a guide.

From Small Boat Restoration 2013

I cut out the entire piece using a jigsaw. Next time I will use a table saw to cut the straight part of the top edge, that will make a straighter line. Remember your goggles and hearing protection.

From Small Boat Restoration 2013

Sanded the edges with a rando orbital sander, 120 grit to give them a nice smooth feel. Our edges are not as rounded as the 50 year old original, we left some room for them to age :) While I was sanding I decided to refinish the rails ou our SS MKII, they were pretty crunchy.

From Small Boat Restoration 2013

We used our rail as a template on where to drill the holes. When I drilled the holes, I put a scrap piece of oak under the new rail so that the drill bit would not blow out (tear out) the back side of the hole, couldn't show that here because I only had two hands. You can see the crusty patina on Sweetness' old handrail.

From Small Boat Restoration 2013

The original rails used a #10 bronze screw that was countersunk. I copied that with a 3/8 inch bit for the head of the screw and 5/32 inch bit for the threads. Next time I'll use a drill press, it was hard to control the exact depth I wanted by hand. Or skip the countersink. After holes were drilled we applied a coat of Minwax clear Polycrylic, it will protect the wood and let the grain show through. Polycrylic is water based and very easy to clean up.

From Small Boat Restoration 2013

The new handrail has shipped, and Sweetness has newly varnished handrails.

From Small Boat Restoration 2013

27 Jun 17:

Made some more handrails, made a set for the 11'7" Standard Sailfish as well, its handrails measure 28 inches. Used the pattern to set the table saw and cut the plank to height.




Traced the Standard Sailfish handrail profile with Winnie as the model.


Cut the ends. Rounded the top edges with a 3/8 inch roundover bit on my 30 year old Makita router.




Cut out the handholds.


Sanded the edges with 120 grit.


#10 bronze wood screw specs.


#10 Combination countersink and pilot bit.


Finished up with a set of Standard Sailfish handrails. Also made a pattern.




If you'd like to order a new handrail, click on the Paypal Buy Now link below. The handrails will be cut from rot resistant cypress and shipped without a finish, so you can finish as you like. Please select the appropriate handrail for your type Sailfish. The 11' 7" Standard Sailfish has a smaller handrail than the 13' 7" Super Sailfish series. Standard Sailfish handrails are 28 inches long and Super Sailfish handrails are approximately 41 inches long.



Sailfish ModelType