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.
The Beam Store from Suitable Technologies is managed by remote workers from places as diverse as New York and Sydney, Australia. Employees attend to store visitors through Beam Smart Presence Systems (SPSs) from the company. The systems combine mobility and video conferencing and allow people to communicate directly from a remote location via a screen as well as move around as if they are actually in the room.
An MIT research team has invented what they see as a solution to the need for biodegradable 3D-printable materials made from something besides petroleum-based sources: a water-based robotic additive extrusion method that makes objects from biodegradable hydrogel composites.
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.