Final Delamination Repair - Hobie 16 Repair

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Today, we are finishing the delamination repairs on my 1979 Hobie 16 by epoxy injection. We are using West System 105 with 209 hardener and 403 microfibers.
Tips for successful repairs:
-Do not drill through both laminates
-Drill clearance hole, so the laminate is not pushed apart
-Thicken epoxy to better fill the void (thick syrup to honey)
-Use sheet metal screws and coat with PVA
-Self tapping screws are helpful to drill through the laminate
The next episode will prepping and installing port holes.
Materials Needed:
-Non-permanent Marker
-Ruler
-Clamps
-Wood Stakes (Anything to spread pressure)
-Drill
-Drill bit for clearance hole (5/32" is clearance for #6 screws)
-Stainless Screws (I used #6 x 1" self tapping sheet metal screws)
-PVA (used to release fasteners; water soluble so we can clean and reuse fasteners)
-West System 105-A Epoxy (I used a quart and a gallon total)
-West System 209-SA Hardener
-West System 403 Microfibers
-West System Minipump Set
-Mixing supplies (cup and tongue depressor)
-Syringe (I used 20 ml Luer no needle; at least 1 per repair)
-Sandpaper 80 grit
-IPA (Isopropyl Alcohol)
Let me know in the comments what you like or dislike about this episode in the comments. I do not want the videos too long, but I also want to show the entire process. These repairs and upgrades take time and effort, and I want to communicate the hardships that come along with it.
Song: RocknStock - Power
Music provided by Tunetank.
Free Download: tunetank.com/track/1458-power/
Song: AHOAMI - Rustle of Leaves
Music provided by Tunetank.
Free Download: tunetank.com/track/6076-rustl...
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Disclaimer:
The views expressed in this and any other video are mine and mine alone and do not represent any employer past or present.

Опубликовано:

31 янв 2023

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Комментарии : 18

@tridactik Год назад

There is a Bill of Materials (BOM) in the video description.

@arthurzengeler8296 9 месяцев назад

I'm in the process of doing this, on the side, and about the same size area. I just cut out the whole piece, then bonded both pieces. Next, I'm going to attach strips of marine plywood, about 3" wide, to the inside of the hull. 11/2", sticks out. The cut out piece, sits on it, I'll epoxy it,, and clamp it. After that, I'll fill in the gaps, then cover the seem, with epoxy and clothe. I've done this before, and it worked fine. Epoxy is stronger than fiberglass, so it's better than new. I tried drilling holes, and injecting epoxy, but only on small areas.

@tridactik 9 месяцев назад

While what you described will work it is significant heavier, more complicated, and can only be used on small local areas. Which is why I chose to drill and fill. Epoxy is not inherently stronger than fiberglass. We use both together to combine strengths and mitigate weaknesses. If you are ever only using epoxy, I would recommend adding milled fiberglass for body and strength.

@85LARGE Год назад

I did so much delam jobs on my old 74 H16. At some point i just had enough and bough a newer boat which is solid as a rock. Sometimes its just not worth it.

@tridactik Год назад

Completely agree. I would only do thus again for smaller areas.

@fattyman9133 2 месяца назад

Whaat about using an inflatable air bladder inside the hull to force the core onto the laminate?

@tridactik 2 месяца назад

I thought about it, but in the end it is a question of risk vs reward. It could work, but there are multiple factors to consider: access to the inside to put the air bladder, ability to make a air bladder that would fill the entire area, ability to ensure constant pressure, but not too much pressure that you cause additional delamination. With the way I bonded this back together I was able to have better control in all areas than a bladder.

@JABTV2008 Год назад

good stuff, mate. Learned a lot. When you say "fasteners", I assume you're refering to long (about 30mm) coarse-thread screws? I also guess you predrill the hole in the bottom laminate to the screws can bite.

@tridactik Год назад

I was using self tapping machine screws. Make sure they are at least 20mm long and you coat them with a PVA mold release. I only drillee through the top laminate to ensure the epoxy didn't just go in and right out into the hull. The self tapping fastener will drill through the other side and grab onto the laminate.

@JABTV2008 Год назад

@@tridactik Ah, that's kinda what I reckoned you did. Perfect!! Thanks very much. I've got a soft spot on my Hobie 18 so I'll be doing that shortly.

@tridactik Год назад

Good luck! I'm jealous of the 18.

@JABTV2008 Год назад

@@tridactik yes, it's a great boat, goes well with new sails, but I still haven't cracked 20 knots yet...maybe this summer!

@episoed1674 Год назад

Hey Mate, I am from australia and have recently purchased two catamarans 'windrush 14's" an australian edit of the american trac 14 design I belive. and one has barley any issues besides minor waterproofing with the beam connections. I just wanted to ask your informed opinion when you push down on the outide of the fiberglass on the inboard area of the hulls how much flex shoud there be in the walls of the hull (where you stand to right it after a capsize) I am 200lbs and am worried about breaking the boat in a bad situation if i capsize.

@tridactik Год назад

Hey, I just went out a felt a couple of the areas that I did not repair. They do not move at all when I press on them. Listen when you press to see if you can hear the core compressing, it will sounds like crackling. If so, your hulls are definitely delaminated. If you haven't checked out my video on how to map delaminations, I would recommend checking it out as that is a pretty sure fire way to see if you have a structural problem with the boat.

@douglasaller4028 6 месяцев назад

I have a Hobie 18 sx that has some ripples and waffles on the front of both hulls. Structurally the hulls are solid. Is there an email address that I could send u some pictures to get ur opinion of if this boat is worth restoring?

@tridactik 2 месяца назад

Hey Douglas, sorry for the late response. You can send the pictures to me at tridactik@gmail.com if you are still looking for a second opinion.

@embededfabrication4482 Год назад

that's why they just rotomold them now why can't you just drill small holes and inject resin with fiber bits mixed in to fill the voids? too heavy?

@tridactik Год назад

I have done that on all of the other repairs. I have a couple of videos on that process of drilling holes, injecting and pulling the laminate together with fasteners.