New for 1997, the Sea-Doo Challenger 1800 jet boat from Bombardier
features twin 800 Series Rotax marine engines, each of which displaces 782 cc
and delivers 110 hp. A variable-rate oil injection system provides a precise
ratio of oil to fuel, ensuring proper engine lubrication throughout the
performance envelope. The Bombardier axial-flow, single-stage Formula Water Jet
system is designed to work reliably in salt or fresh water. Bronze alloy stator
vanes resist erosion caused by cavitation. Floating couplings with crowned
splines minimize vibration damage to engine and pump. The progressive-pitch
drive impellers are stainless steel and produce improved acceleration over
earlier models, a higher top speed, and less cavitation. Replaceable urethane
wear rings improve impeller life and are easy to maintain. Finally, a
sacrificial zinc anode protects the propulsion system from corrosion.
What should be the perception of a product’s real-world performance with regard to the published spec sheet? While it is easy to assume that the product will operate according to spec, what variables should be considered, and is that a designer obligation or a customer responsibility? Or both?
Biomimicry has already found its way into the development of robots and new materials, with researchers studying animals and nature to come up with new innovations. Now thanks to researchers in Boston, biomimicry could even inform the future of electrical networks for next-generation displays.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.