By no means graceful, or perfect

Ok, so I just did a second water test. ( I did more than just float near the edge this time, promise) 

So I'm a little disappointed with how the skin performed. I have to go back and seal the seams again, the sealer I used didn't quite cut it. Also I've come to find out that it matters a lot how tight the skin fits you the frame. If its too loose and the water billows the fabric in and the boat sits very low in the water. Anyway, there is the video and I've uploaded a few more pics to the gallery. 

The Steadfast

Okay, So I went to Skills USA over the weekend, the regional competition, and my PakYak won the first place prize for the engineering challenge! I got a one year tuition paid scholarship to Vincennes University.

Also, thanks to a computerized embroidery machine at my school, I was able to name my boat as I was making the skin. It is now the Steadfast and has it's first water trial in the pool here at school. I wouldn't call it a maiden voyage though, considering that I didn't go anywhere or move away form the edge of the pool.

Thats the exiting part, but it took a lot to get there. I spent Friday, the day before the competition, finishing up some of the skin in a last mad scramble. But, thanks to a couple of late nights, I'm all but finished with my PakYak. I still need to seal the wood and spend a few minutes of detailing for the seat, but all and all its done. Who knows what the first real water trial will turn up though. Anyway,  I have a lot more pictures in my gallery and a video of me unfolding the boat. 

Sorry the video is a little blurry. In real time it takes me about 10 minutes to unfold the Steadfast.

Also there are some people in a few of the picture's I've uploaded that have given some sort of help to me throughout the process.

Come a Long way

I a few days ago I built half of the center brace of my PakYak according to how I've drawn them in my PDFs, but it didn't work. I spent a little while manipulating the dimensions on Autodesk Inventor and came up with a modified design that seemed to work in the computer model. I then modified my existing center brace and came up with this:

So now that my center brace worked I could build the other one. Anyway, long story short, this post is more of a pictorial update, seeing as how my last one was rather lacking. I've uploaded a whole bunch more pictures to my PakYak album, should be linked there to the right on this page. If by chance its not, heres another link right.... over... here.

Almost to the halfway point!

Well I don't have anymore pictures today and I haven't posted in a good long while, but I can say that after a hectic few months in which I couldn't work on my boat I am finally to about the halfway mark. I have 90% of one half of the frame completed and it looks great. I still have to make pdf design details for the center brace structure and gunwhales, that should be done this week, and once I have the frame finished I can start tailoring a skin to the frame, bringing me to the home stretch. 

Also I've discovered an interesting DIY article on waterproofing wood, as long as the finish doesn't have to be anything in particular. The article is here, but in short this guy goes through various dilutions of a acetone fiberglass resin solution, starting with a 50-50 mixture and working his way up. He says that it allows for the waterproofing to soak into the wood deeper and leaves almost no tactile coating on the wood, but outperforms even name brand sealers. This process is a little more extensive that it would be just to seal the wood pieces the convectional way, but I think it might yield a better product, I might even paint the pieces afterwords who knows. 

Also I cheaped out on the wood, Jim Heter calls for 9 ply 1/2 inch baltic birch plywood, but I bought 7 because it was substantially cheaper due to the fact I could purchase it in a smaller quantity. At the time, I didn't realize how big of a difference there is between the two types of plywood, I figured that it wouldn't make much of a difference. Anyway, my point is that I'm hoping that this firberglass resin might even minutely increase the strength of the boat. 

P.S. anyone taking on this project, I would really recommend using 9 ply baltic birch instead of 7 ply. Unless you absolutely can't help it, get the 9 ply. So far is seems that the 7 ply I bought will suffice, but likely only just. The 7 ply has many voids in it, in comparison to the 9 ply stuff.

Aluminum has arrived, bought wood, started cutting....

Alright, so no one significant even has happened since I last made a post, but I figure that the accumulative of these were excuse enough. 

So, I bought the plywood I needed and the aluminum as well. From that it was easy enough to rip through the 2'x4' board I had into 1" strips on my tables saw, but it seems another story all together finding time during school to get them rounded on the shaper. Ah well, can't be helped for now though. 

In light of those delays though I was still able to make all of the strait cuts needed for each of the 1/8 angle pieces on both mid braces. 

 

Also I uploaded a dozen or so new photos for the album there to the right.

Another Great Weekend

Alright, so this weekend I focused on smoothing out dimensioning issues and working on a fully assembled 3D model, which I did get a prototype version completed. The model still has a few quirks and issues to fix, but at first glance it does look like a completed frame assembly. There a few details, such as four of the top stringer's I still have to give visual representation to how I'm going to attach them.

here are some pics of the full assembly.

Whew, got a lot done this week end

Surprisingly enough I was able to get a lot acomplished this weekend. I first decided that I needed to draw out as much as the boat as I could pull dimensions out on and that worked out really well and, as it turned out, the dimensioning I had started on for the end brace previously was all wrong. So reworking things turned out really well for me. I also have a naming system in place that I will be using for all of the peices as i go along in the build. For now though I have both the End Brace and the Mid Brace assembled in Autodesk Inventor and, of course, all of the peices that go with them dimensioned and saved.


To the left there is the end brace and to the right the mid brace

Each of these braces will apear twice in the boat, since it is esencialy just half a foling Kayak mirrored width wise. Finally the last thing I did was to take all of the information and pieces I had built up for the end brace and put them into, what I hope is, an easy-to-read set of diagrams to referance later when I physicaly build the PakYak and for others. I could have gotten the mid brace done the same way, with the information I have, but doing that work gets sort fo tedious after a while. Not to mention I still needed to confirm a few details with Jim Heter first.

Fabric Just Came In

Alright, so something that I left out in yesterdays post was that about a week ago I ordered the heavy duty nylon fabric for my PakYak's skin. Although this step in the project is still a good distance off I decided to order it now because I found a great price on the 1000D polyurethane coated nylon fabric in the closeout section of Rochford Supply. Of course I didn't want to miss it, so here I am a week later with 8 yards of digital camo (the new pattern the military is using for their uniforms) arriving here on my doorstep, though strictly speaking I only needed 5 yards of the stuff. Yeah, I know it isn't really all that exiting, but I figured make the effort to make the update.

I'm getting started now..

For those of you who don't know what the PakYak is, its a collapsible Kayak that folds down into a convenient backpack sized pack. (roughly 12" by 6" by 20" in the model I'm building) Which then unfolds into a nifty 10' Kayak. It's comprised of a wooded or aluminum frame that unfolds inside of a waterproof nylon fabric skin to keep the boat afloat. The latest model, which can be seen on Jim Heter's PakYak website linked to the right, is actually a compilation of over 20 years of experience with the "PakYak" design and idea. Also on his website are the plans to his 4th version model.

My goals during this project are: to be able to confidently say that I understand exactly how this design woks, I can say that I've built one, earn a high school credit for doing this project for a research and development class, and finally (as a by product of the previous goal) to contribute to the PakYak through helping to make it easier for others to build by providing isometric views of the design and it's components with my 3D modeling software.

For the time being things will be a little slow since I don't have a prescribed time set aside yet to work on my PakYak with any sort of regularity, but my hopes are high.

So far I've begun to pour over some of the design modifications that were made to Jim Heter's latest design versus the 4.0 PakYak that he has plans listed for on his website. The details that Jim gave to me on the new design can be veiwed here: http://docs.google.com/Doc?id=ddvg4hw7_19hs2446cd A lot of this is just going to be wrapping my mind around it and chipping away slowly at the details. I've already started to build my boat digitally in Autodesk Inventor and so far I just have the bare bones to one of the endbraces.