The software is still under development and this version has a beta status. Please, if you find some bugs during the JBLADE use, report that to jmorgado@ubi.pt. JC Propeller Design With this program you can build your own propellers and save money, and at the same time get a propeller that is specially computer designed for you.

• Clothing Design Program
• Design Program Free Download

A group of researchers is proceeding with trials for a revolutionary rudder design know as a gate rudder. In the next round of testing, the researchers are preparing to retro-fit the propeller to a coastal cargo ship seeking to confirm data that suggests the design is more efficient in propulsion and steering resulting in lower fuel consumption and improved environmental performance.

Known as the gate ruder, the initial design was developed and patented in Japan and tested on a 2,400 gross ton container ship in November 2017. Wartsila at the beginning of 2020 licensed the technology for development and global marketing while a group of researchers and 17 partners working in Glasgow, Scotland at the University of Strathclyde received a €6 million ($7.2 million) EU grant under the Horizon 2020 Research and Innovation Framework Program to retrofit the rudder system to a commercial ship further demonstrating the fuel savings and improved maneuverability produced for vessels.

Unlike a traditional rudder which sits behind a ship’s propellers to steer the vessel, the gate rudder is “U” shaped and sits astride the propeller. The design produces a “duct effect” acting as a nozzle to generate additional thrust. The two arms of the rudder can be independently controlled to provide better steering while underway as well as helping vessels to move sideways for example when docking.

“As a propulsor-based solution, the gate rudder offers a significant amount of power-saving that cannot be achieved by any other single energy-saving device which is currently available in the market,” says Professor Mehmet Atlar, who is the project coordinator from the Department of Naval Architecture and Marine Engineering (NAOME) at Strathclyde. “An important advantage of the gate rudder system is highly-effective maneuverability within coastal and port areas as well as navigating more efficiently in waves during oceangoing operations.”

The research team, which includes the patent holder, Dr. Noriyuki Sasaki who is a Visiting Professor in NAOME at Strathclyde, believes that the gate rudder system is simple, generic, and flexible. They report that it can be installed on new-built ships or retrofitted to existing ships, as well as integrated easily with other fuel-saving and emission reduction technologies.

'GATERS demonstrates significantly reduced emissions from ships particularly within coastal and port areas, challenging and even exceeding the current and future legislative requirements of the International Marine Organisation and local regulations for emissions,” says Professor Atlar.

The first full-scale sea trials were conducted in Japan by Kamome Propeller with support from The Nippon Foundation. The tests were run with a 360-foot container ship fitted with the gate rudder, while a sister ship operated alongside with a conventional rudder. These tests confirmed the superior performance producing a significant energy saving as well as favorable performance in maneuverability and quieter operations with a reduced wake.

Research data shows the potential for a fuel-saving of 15 percent in calm waters, while it could be as high as 30 percent in rough seas. The gate rudder is also quieter than a traditional rudder system, reduces hull wake, and can help to protect the propeller from damage which would be particularly beneficial in sensitive environments such as the Arctic.

The GATERS project at the University of Strathclyde seeks to advance the concept. The researchers will use data gathered from the sea trials to demonstrate whether the system can be applied to an existing 295-foot coastal cargo ship as a retrofit. They are also exploring applications for other oceangoing vessel types and sizes.

Summary

• Product Name: Halo JC 5
• Manufacturer: Parasound
• Review Date:June 03, 2018 12:00
• MSRP: $5,995
• First Impression: Pretty Cool

• 400 watts x 2 @ 8 Ω RMS, both channels driven
• 600 watts x 2 @ 4 Ω RMS, both channels driven1200 watts x [email protected] 8 Ω,
  
• CHK Infinium, custom 5-way speaker binding posts
  
• Neutrik locking XLR input connectors
  
• Vampire gold-plated RCA input & loop output jacks
  
• Direct-coupled signal path, no capacitors or inductors
  
• AC turn-on inrush surge protection with relay bypass
  
• Dual-mono input stages with ±110 volt DC rails
  
• JFET input stage, MOSFET driver stage
  
• 24 beta-matched 15 ampere, 60 MHz bipolar output transistors
  
• 1.7 kVA shielded toroid power transformer with independent windings for each channel
  
• Independent power supplies for left & right channel input stages, driver stages, output stages
  
• 8,880 µF Nichicon Gold Tune filter capacitors for input stages
  
• 132,000 µF Rubycon filter capacitors for output stages
  
• 4 rack space chassis with rear carry handles
  
• Rack mount hardware included
• Dimensions (wxhxd): 17-5⁄8' x 7-1⁄8' x 20'
  
• Weight: 73lb
• Available in silver or black
  

Executive Overview

After 16 years of legendary reviews from their JC1 amplifier, Parasound has finally given consumers exactly what they want: Two top-of-the-line Halo JC 1 monoblock power amplifiers integrated into a single chassis that is the same size as one JC 1. The new Parasound Halo JC 5 combines high power and ultra-high bias Class A/AB sonic quality at roughly two-thirds the price of a pair of JC 1s. The Parasound Halo JC 1 monoblock was designed by John Curl and since then has garnered an amazing amount of popularity and notoriety as a benchmark for amplifier performance and value.

The new JC 5 is a remarkable amplifier that creates a new sweet spot in our Halo product family. Our customers often tell us they love everything the JC 1 offers, while wondering if we could deliver comparable performance in a no-compromise stereo amplifier, and save them money and space. We challenged John Curl to distill the essence of two JC 1 mono blocks into a single chassis, and the result has exceeded everyone's expectations.

- Richard Schram, the president and founder of Parasound.

The Parasound Halo JC 5 comes with high bias class A/AB and is designed to provide 12 watts per channel pure class A power and class AB to its 400 watts per channel 8 ohm rating. It can also deliver 600 watts per channel into 4 ohms, and it can be bridged to mono for 1,200 watts into 8 ohms. The output stage employs 24 beta-matched, 15 ampere, 60 MHz bipolar transistors to deliver a formidable peak current of 90 amperes.

The power supply employs a 1.7 kVA shielded toroid power transformer with a premium H18 grade steel core. It has independent secondary windings for its dual-mono power supply. As with the JC 1, input stage B+/B- rails are 10 V above the output stage rails to eliminate any chance of distortion caused by voltage sagging when the amp is under load. Independent power supplies for left and right channels input stages employ filter caps totaling 8,880 µF. Driver and output stages employ massive Rubycon filter caps totaling 132,000 µF.

The Halo JC 5 is direct-coupled, protected by DC servo circuits to eliminate coupling capacitors, while extending bass response down to 5 Hz. Its balanced inputs use discrete circuits with Neutrik locking XLR connectors, and Vampire 24k gold-plated RCA input and loop output jacks. Five-way 'propeller' speaker binding posts are custom-manufactured for Parasound by CHK Infinium. They are 24k gold-plated and accept 7-gauge bare wire. The premium-quality 9 foot detachable IEC 12 gauge power cord features silver-soldered connectors.

Parasound's refined Halo design aesthetic is evident in the JC 5. Slim, hand-milled solid aluminum endcaps with gold highlights amplify its grace and elegance. The JC 5 is available in silver or black. Rack mount hardware for its four rack space chassis is included. The net weight is 73 lbs. The Parasound Halo JC 5 Stereo Amplifier will be available from Parasound US dealers and international distributors starting this month with a suggested retail price of $5,995. This product has the type of guts we love to see in a high end amplifier. Is this the power amp your seeking to upgrade your system? Share your thoughts in our related forum thread below.

Confused about what AV Gear to buy or how to set it up? Join our Exclusive Audioholics E-Book Membership Program!

Recent Forum Posts:

Clothing Design Program

Design Program Free Download