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Building a Trebuchet by Tom Pawlak — GBI Technical Advisor Above: Robbie loads the trebuchet for another practice shot before the competition. A while back, my nephew Robbie, about 15 years old at the time, asked for help building a trebuchet (a form of catapult) for an upcoming Science Olympiad competition that his school was […]
by Tom Pawlak — GBI Technical Advisor I hesitated to write this article about repairing my old lawn mower because my friends accuse me of being a cheapskate. The text and photos to follow will only strengthen their argument. That being said, I can’t be the only person who would prefer to fix something rather […]
by Tom Pawlak — GBI Technical Advisor & Jeff Wright — Vice President of Technical Services Above: This joint style in an edge-glued, 1/8″ thick HDPE plastic strip which holds tight when deflected and is a good choice when gluing plastics. One of our goals for G/flex® was the ability to bond to a variety […]
By Bruce Newell and Stan Bradshaw Above: Stan and Glenda Bradshaw in the Mad River Freedom 16′ Royalex canoe repaired with G/flex Epoxy in August 2007 on the Blackfoot River near Ovando, Montana a couple of miles downstream of the Roundup Bar. The wooden gunwales of Royalex canoes can rip a hull apart if left […]
New Possibilities for HDPE Boats D-ring pads are often attached to flexible surfaces with urethane adhesives to gain load-carrying capacity where there otherwise wouldn’t be any. They are used on waterproof fabric cargo bags, heavy tarpaulins, and inflatable boats. They are also sometimes used on the decks of canoes and kayaks to hold cargo in […]
