Stopping Tie-Down Vibration

A recent discussion on the Duckworks mailing list taught me a couple of little tricks that I thought were worth sharing.

If you have tie-down straps (say holding your small craft on your car top) that are vibrating in the wind, there is a solution: twist the strap several times so that it is not flat.

I know that newer car radio antennas often have a spiral "ridge" on them that supposedly helps with sound and vibration. This tip seems to follow the same idea. I’m sure there are some very fancy fluid flow dynamics involved, but seems like its at least worth a try.

Varying recommendations on how many twists came up. It depends on the strap width, length of unsupported span, and speed, so just give it a try. One person even suggested twisting it many times until its more round than flat. I’m not sure if that is going to have adverse impacts on the tie-down aspects of the strap, but I imagine it certainly changes the vibration properties.

One last tip… if all else fails, get some of the round foam pipe insulation and tape it over the strap… apparently that works also.

Boatsmith Marine Carpentry

>>> Boatsmith Marine Carpentry

After the Tiki 30 link, I wanted to point out Boatsmith. They seem to be doing nice work, and most importantly to me, are making some really great blogs and tips available on the web. This isn’t an approach many of the commercial companies have adopted yet and I think it’s great that they are.

Check out their "Building A Custom Sportfishing Yacht Interior" and "Boatsmith Shavings" (tips and tricks) in addition to the Tiki blog.

Some recent comments – epoxy, spiling and other goodies

I wanted to point out some recent comments and the great resources they are (either in themselves or in the sites they point to).

  • A recent poster pointed out the Michael Storer Boat Design site, emphasising the resources that Mr. Storer makes available, including instructions in epoxy use, etc. I especially found the tip on using a ziplock bag for epoxy dispensing to look interesting. I had seen this idea sometime before, but forgot by the time I was actually using epoxy. I’ll be giving it a try!
  • Another has given a link to a web page showing the process of motorizing a Wavewalk Kayak… looks like fun.
  • Lastly, I wanted to highlight this description of "spiling"… it looks to be a great technique for finding the size and shape of side panels/planks. I also found this link at Southern Crown Boatworks which has a good section on spiling. That page also has info on sawn frames, steam bending, lamination and lofting if you are wanting to read up on any of those.

PVC Pipe onboard parts and tool storage

Wesley Cox in the Bolger mailing list had a good idea I thought was worthwhile to pass on:

I, personally, minimized the size and weight of my kit, put it and registration papers in double plastic baggies inside a length of 2" pvc pipe w/ one solid cap and one threaded with a fitted steel collar with a small ring welded to it and tied to the boat.  A semi-water proof, small, durable container.  Tied snugly to that was the spare prop.  Working on a motor while stranded on the water is SO much fun!  … I’m a fabricator by trade so the steel collar was easy, but something could easily be fashioned with a stainless steel hose clamp or two.