Page 63: of Maritime Reporter Magazine (June 1994)

Elliott Bay Design Group Completes

Plans For First 20-Foot RIB

Group.

Elliott Bay Design Group of Se- attle has completed a design, engi- neering and lofting project for the company's first aluminum rigid-hull inflatable boat (RIB) built by Twin

Dolphin Distributors of Half Moon

Bay, Calif.

The 20-foot (6-m) boat, originally constructed in fiberglass, features a deep cockpit, a built-in water bal- last tunnel and a patented deck design that extends up over the in- flated tube. The boat is designed to be fully operational even when its tube is removed, and the extended deck reportedly makes operations such as personnel transfer easier and safer.

With the move to aluminum fab- rication, Twin Dolphin wanted to produce an even tougher version for the workboat market, while retain- ing its reputation for speed and sta- bility. They also wanted the lofting to provide a "kit" approach for effi- cient volume production. "Elliott Bay's design incorporates numerous features to improve the manufacturing process," said Twin

Dolphin President Rodney

Robertson.

Although the scale was much smaller than the tankers, ferryboats, and other commercial vessels Elliott

Bay routinely works on, the same

CAD and NC cutting techniques were applied to the Twin Dolphin boat, according to project engineer

Eric Jolley. "We wound up with a plan that calls for 75 pieces that will be pre-cut and formed for the builder, ranging from an 18-foot (5.5-m) by four-foot (1.2-m) shell plate piece to a 6-inch (15-cm) by 3-inch (7-cm) bracket. All major parts are tabbed and slotted for easy fit-up and accu- rate assembly."

Enhancing the "fit and finish" aspect of the project, the Elliott Bay design calls for the use of 3M's VHB tape system to attach stiffeners to the shell plate. Replacing a good deal of welding, the flexible VHB system provides ease of assembly due to lack of welding distortion and reduced metal fatigue.

For more information on Elliott

Bay Design Group,

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Meet Our New WORKSKIFF 23'

Raytheon, Software Co. Win

Technology Contract

Raytheon Co. and Compact Soft- ware have been awarded an ap- proximately $4 million contract to develop a computer-based system to aid in the design of high frequency vacuum power tubes in specialized areas including antenna design and computational electromagnetics.

The contract is the second phase of a joint Army, Navy and Air Force microwave and millimeter-wave advanced computational environ- ment program (MMACE)—the first phase of which was the implemen- tation of a prototype system now in use in the power tube industry.

The goal of MMACE is to com- bine existing high-frequency power tube design software into a single environment employing standard- ized modeling, simulation, commu- nications and data processing prac- tices and techniques.

The work will be performed at

Raytheon's Missile Systems Division

Laboratories.

Other organizations participating in MMACE are NASA, the National

Institute of Standards and Technol- ogy, Hughes Aircraft Corp., ITT,

Litton Industries, and Teledyne

Corp.

Tough, trailerable, designed for roughest conditions, our new 23' skiff extends our line of the hardest working, most versatile boats available. It's shown here with optional "walk-through" pilot . house. For more informa-

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