Double-Cutting and High-Speed Planing Machines

A Contactless Axis for High Speed Cutting Machines

Machine tools require linear guides with high stiffness and damping at high feed rates. At the same time, a high position accuracy is essential. The linear guides used together with linear direct drives in High Speed Cutting (HSC) Machines have to fulfill these premises along with the necessity to support the high normal forces of a direct drive. Large frictional forces and high wear result fro...

Performance Analysis and Prediction of High Speed Planing Craft

A comprehensive and critical review of literature pertaining to the study of planing craft is given within this work. This study includes monohull design, analysis and performance prediction for flat water; many features of the planing characteristics, including dynamic stability, the use of stepped hullforms, re-entrant transoms and flow characteristics are detailed. Work on the rough water se...

EtherCAT | Cutting Costs with High-speed Ethernet

Vertical Plane Motion of High Speed Planing Vessels with Controllable Transom Flaps: Modeling and Control

Hydrodynamics of porpoising instability in vertical-plane motions of high-speed planing vessels have been investigated for years. However, not much work has been published on dynamic control of vertical-plane motions of planing boats by controllable appendages. In this paper, effects of controllable transom flaps on heave/pitch motion characteristics of high-speed planing vessels are investigat...

High-speed dolphins burn double calories.

Surviving in an environment that actively impedes your progress can leave you vulnerable during an escape; couple this with the need to conserve limited oxygen reserves and the magnitude of the challenges faced by many cetaceans when threatened becomes clear. ‘Amazingly, there has been only a handful of studies that have actually measured the energetic cost of a dive for dolphins or whales’, sa...