When I was designing my first packrafts I used a roll of clear plastic vapor barrier from the hardware store (used for house construction) and the tape they sell for sealing it. My prototypes weren’t completely airtight, but close enough to judge whether or not they were the right shapes when inflated.
The speed difference between the Atlin and Telkwa is not much. I have only tested it a little bit with GPS on a lake, but it seems like the Atlin is about 10% slower (less than 1/2 km/h difference). On rivers, speed is less important because the river does most of the work for you.
If the packraft’s length is critical, you can make the stern (tail) a bit shorter and less pointy by simply rounding the tube pieces more before adding the final seam strip that joins them together. On the Telkwa you could do the same on the bow (front).
I have sent only a few packraft kits to Spain, and I don’t recall where exactly. I hope you can connect with someone though!
I’m sorry to hear that the Ultralight isn’t the right packraft for your adventures, but it sounds like you’ve already done some great paddling – Icebreaker – haha! That’s fantastic!
The Klymit LiteWater Dinghy appears to be made with the woven fabric on the outside, and pretty much all packraft seats are made that way, too, so you’ll probably be okay, depending on what you’re designing.
I’m glad that the damage wasn’t too bad. If you email me with the dimensions you want, I’ll see if I have a large enough scrap I can set aside for you.
Beautiful! And thanks for telling me about the log encounter – I think that’s the first one I’ve heard about, so it’s good to know. Did it damage the seat, too?
One option to patch and reinforce the floor under the seat is to use some of the scrap floor or tube fabric (or inflation bag fabric). It wouldn’t be pretty though. If you use the tube fabric then I would spread a thin layer of Seam Grip+WP over it to protect from abrasion and prevent it from soaking up water. Cheers!
Thanks for the tips and the feedback, Opie! There’s great information here, so I’ve combined your two posts into a Customer Build Report, which I’ve posted here.
One thing I would suggest is to coat the outside of the seam strips below the waterline with Seam Grip+WP or Aquaseal, otherwise they will start to peel when you’re scraping down those shallow rivers.
Thanks for posting these great pictures, Eric! That looks like an amazing trip – gotta love those clear mountain lakes. I’m glad the fishing rod holders worked, too – I think you’re the first person to try that in the Ultralight. Fantastic!
Thanks for this detailed report, Opie – it looks like you did great work! I plan to post this in the Customer Build Reports gallery along with your tips and tricks so this doesn’t get buried in the forum thread. I think you’re the first person to provide such detailed feedback about the 2-Person build – thanks!