Page 5: of Maritime Reporter Magazine (June 15, 1981)

TUNNEL TUBE TIDAL WAVE — Mam- moth fabricated steel, double-tube section for the Interstate-95 Fort McHenry vehicular tunnel under the harbor at Baltimore was side-launched recently into the Susquehanna

Kiver following ceremonies at Wiley Manu- facturing in Port Deposit, Md. The double- tube sections — each 42 feet high, 85 feet wide and about 320 feet long — represent the core of the tunnel. Wiley, a unit of AMCA

International, will launch the fabricated steel sections on a one-tube-every-three-weeks schedule until delivery of the final sections early in 1983. This is the first of a total of 32 double-tube sections that will be fabricated at the Wiley yard to complete the project.

Once launched, the tubes are taken by tug- boat to an outfitting site in the Baltimore

Harbor where they will be prepared for place- ment to form the tunnel under the harbor.

Floating Doughnut Crane Shown

At Shugart Crane Conference

The introduction and demonstration of the revolutionary new Floating Doughnut Crane (shown above) was held recently as part of a dav-long floating crane symposium hosted by Shugart Manufacturing, Inc., with the cooperation of American Hoist and Derrick

Company, at Shugart's facility in Chester,

S.C. "The Floating Doughnut Crane is a new concept which, in the foreseeable future, will dramatically affect the design, construction, and operation of the entire marine construc- tion industry," said Tom Triplett, the crane's inventor and president of Shugart. "The pur- pose of this symposium is to give port op- erators, design engineers, contractors, and dealers an opportunity to thoroughly evalu- ate this new tool and the prospects it offers for increasing productivity in the coming years," Mr. Triplett said.

Symposium speakers included Thomas A.

Fridy Jr., vice president and project director of Lockwood Greene Engineers, Inc., who spoke on "Prospects for Marine Construc- tion" ; "Prospects for Port Expansion" was presented by D. Claude Baker, general man- ager for operations, South Carolina Port Au-

June 15, 1981 thority; "Overall Characteristics of Dough- nut Cranes," by Bernard L. Jones, chief en- gineer for Shugart; "Flotation Characteris- tics of Doughnut Cranes," by Norman N.

DeJong, president of Norman N. DeJong &

Associates; and "Structural Characteristics of Doughnut Cranes," by Richard Juelich, chief engineer-product development for the

Marine/Energy Division of American Hoist and Derrick Company.

For further information and free color brochure on the Doughnut Crane,

Write 48 on Reader Service Card

New WABCO Bulletin Describes

Control Systems For

Diesel-Powered Vessels

A new full-color bulletin from WABCO

Fluid Power Division, American-Standard de- scribes and illustrates the new Logicmaster® propulsion control systems for use in diesel- powered vessels with air clutch type reverse gears. Logicmaster systems include inter- locks and protective circuits to automatically provide proper engine and reverse gear op- eration without the need to rely on the opera- tor to time the sequence of control lever operation. They prevent wear or damage from high-speed clutch engagement and en- gine stalling during reversal.

Standard Logicmaster systems include fea- tures such as governor power boost, cross- engagement interlocks, timed reversing inter- locks, clutch pressure/engine speed interlock and soft-clutch engagement feature. Options include the addition of shaft brake control and proportional timed reversing interlocks.

For a free copy of Bulletin A9-152.00,

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