I used lost foam construction to fabricate a fiberglass air scoop for my son’s Formula Continental C race car. Our project started because a modification to the shape of the race car body necessitated the construction of a new air scoop. The air scoop is bolted to the car body so if either the air scoop or the body is damaged (a very likely scenario), the repair will be simpler. To fabricate the scoop, I made a Styrofoam male mold, surrounded the mold with fiberglass, and then dissolved the Styrofoam to leave a hollow part. I used Styrofoam to build the male mold for several reasons. It is readily available at most lumberyards, it is easy to shape with files and sandpaper, and it is easy to dissolve with lacquer thinner.
Here’s another use of the lost foam method to produce a custom part with a molded interior cavity. In this case, the part was a masthead fitting to hold an internal sheave and provide a route for the halyard to pass. This method can be adapted to a variety of other applications, as demonstrated in Fabricating an Air Scoop.
Cover Photo: Greg Hatten battles white water on a trip trough the Grand Canyon in his replica dory, PORTOLA.
On March 21, 2012, river runners from five western states, Canada, Japan and Chile launched five homemade boats, replicas of important historical designs, in an attempt to complete a 24-day self-guided traverse of the Colorado River through Grand Canyon. The replica boats represented a snapshot of river running in Grand Canyon during the 1950s and 1960s, just before Glen Canyon Dam took control of the Colorado River through Grand Canyon. Continue reading →
This article is Lesson 4 of a series. See bottom of page for links to additional articles in this series.—Ed.
The way a finish ages has everything to do with the way it is anchored to the wood. Sealers and primers are often taken for granted; we simply read the can and follow directions. There are so many reasons for using a sealer and many methods for applying them. Let’s look at what we learned while sealing Sparks, the electric launch I built. Continue reading →
A grapnel or grappling hook is a device with curved tines or “flukes” attached to a rope used for retrieving overboard objects. For pleasure boaters, a grapnel should be small, lightweight and made of non-rusting materials. I think every cruising boat should have one. The only ones I could find were too large, or were a folding grapnel anchor, not a retrieving hook.
To get what I wanted I had to make my own. I settled on a treble configuration and chose galvanized steel. Although plenty strong, this grapnel is intended for light service, up to about 40 lb, which is about as much as the average person can lift with a line anyway. Continue reading →
Ten years ago the rear fender on my son John’s 1991 Honda Accord was damaged just forward of the wheel. It had been repaired at a local body shop, but four months later the same fender was rusting. I took it back to the body shop. The manager apologized and agreed to redo the job, but said there wasn’t much metal for his technicians to work with because the car had rusted significantly prior to the accident. He couldn’t guarantee that it wouldn’t rust again.
I asked him if he would consider painting both rear fenders in exchange for me rebuilding the problem fender, and he agreed. I planned to rebuild the fender myself with epoxy, and also rebuild the rusted fender on other side. I knew I’d be able to do a much better job with WEST SYSTEM Epoxy and fiberglass than with the polyester-based putties the auto body repair shop had used. Continue reading →
Are you the kind of person who just can’t get enough of a good thing? Looking for a better way to squeeze out that last little bit of G/flex adhesive from your tube rather than resorting to pliers, a vise or maybe even Grandma’s rolling pin? Maybe you’d like to get a fatter bead of adhesive or your tube is a bit clogged. Boy, do we have some easy and inexpensive tricks for you! Continue reading →
While WEST SYSTEM® epoxy has a long shelf life, age will eventually affect its handling characteristics and cured strength. When stored for very long periods, hardeners may turn darker (reddish to purple), become thicker and give off more odor. 105 Resin may lose some clarity and also become slightly thicker. Use extra care when mixing age-thickened products (stir extra thoroughly), and if color and/or clarity are crucial to your project, buy some fresh resin and hardener for best results. 207 Special Clear Hardener is specially formulated for clarity and flow. Continue reading →
When I told my brother that I was going to build a boat he asked me, “Why?” I didn’t discover the answer until after the project was completed.
I work in the Operations Department at Gougeon Brothers, Inc. and have been here 12 years making WEST SYSTEM® products: epoxy resin, hardeners, fillers, packaging fiberglass etc. But I’d really never used it on a big project. The company has always been involved in boats and boatbuilding, so I figured a boat project of my own would provide me with some ‘how to’ epoxy experience.
I could envision my two young daughters rowing a boat their dad built, but I had to convince my wife. I like to fish and so do my girls, so a good fishing skiff couldn’t hurt. “Think of all the fish fries,” I told my skeptical wife. Continue reading →
Over the course of the last couple years Gougeon Brothers Inc. has partnered with Waste Management Inc. to implement a comprehensive recycling program that has been both simple and effective. We are now recycling emptied plastic and metal containers, shrink wrap from bulk packaged items, dispensed adhesive cartridges, cardboard boxes, miscellaneous soft and rigid plastic items, office paper, magazines, etc.
Our customers may also recycle many of the containers and related packaging items Continue reading →