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.
Sales of semiconductors, interconnects, and other electronic components in North America were flat through the second quarter of 2015, reflecting a pattern that’s been repeating itself for several years.
An in-depth survey of 700 current and future users of 3D printing holds few surprises, but results emphasize some major trends already in progress. Two standouts are the big growth in end-use parts and metal additive manufacturing (AM) most respondents expect.
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.