 In 1999, an article about their characteristics was published in the American Journal of Physics.The article presented a "quantitative analysis" of the performance of the Guillow Super-Ace, which weighed 3.51 grams and sold for $1.99 at that time.The company's product line includes dozens of inexpensive slide-together balsa gliders and rubber band-powered airplanes, and dozens of more complex stick-and-tissue scale model airplanes.