<% If Request.QueryString("nID") = "" Then Response.Redirect "newspressrelease.asp" End If%> Lapp News Articles-Helicopter Deck Traffic Simplified with Flexible Cable Installation <% Set foo = Server.CreateObject("ADODB.Recordset") foo.open "SELECT nID, sTitleGraphic, sTitle, sPhoto, sBody, sProductLink FROM tbNewsArticles WHERE nID=" & Request.QueryString("nID"), Application("CatalogDatabase"), 0, 1 textBody = foo("sBody") Set rsSearchResults = Server.CreateObject("ADODB.Recordset") rsSearchResults.open "SELECT nID, sTitleGraphic, sTitle, sPhoto, sProductLink FROM tbNewsArticles WHERE nID=" & Request.QueryString("nID"), Application("CatalogDatabase"), 0, 1 if not rsSearchResults.eof then if trim(rsSearchResults("sProductLink") & "") = "" then sProductLink = "onlinecatalog.htm" else sProductLink = rsSearchResults("sProductLink") end if end if %>
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Featured Article

HELICOPTER DECK TRAFFIC SIMPLIFIED WITH FLEXIBLE CABLE INSTALLATION
Design Product News, November 1997

 


Indal Technologies Inc.

(ITI) of Mississauga, ON, has designed a handling system for the free-deck landing of helicopters on naval vessels.

The ASIST (Aircraft Ship Integrated Secure and Traverse) system employs a sophisticated electro-optic tracking system, which automatically positions the deck-mounted securing device under the descending aircraft, while providing the pilot with visual landing cues. Upon touchdown, the helicopter's probe is quickly secured, enabling helicopter alignment and traversing of the helicopter into the hangar. All ASIST electrical and mechanical systems are modular and are housed in the hangar or below deck level to minimize space and weight requirements.

According to ITI program manager David Crampton, the mechanism used to secure and traverse the aircraft features capabilities that can be used to move the helicopter so it is centered and aligned with the deck track and then move the aircraft into the hangar. "This is an advantage over other mechanisms that require manual straightening of the aircraft." In fact, the system is so versatile that the helicopter can be rotated safely through 360 degrees on the flight deck.

In spite of the advanced design, including the ASIST software that can measure probe tip position to <5 cm for pinpoint landings, day and night, a 250-ft. electrical cable that runs down the deck track caused great concern.

The problem was two-fold: first, the MHOF-30 Mil-C915 cable's jacket could not stand up to being repeatedly dragged back and forth on the steel, below the deck surface of the track; second, the cable's conductors were susceptible to "Z" kinking because of the 90 degree and 180 degree turns the cable made through the tension controller and the cable's high speed of 5 ft/s.

Olflex® Wire & Cable of Fairfield, NJ, has since designed a cable "encased in a specially blended, tough, abrasion-resistant jacket that withstands sea water, aircraft and hydraulic fuels, lubricating oils, and temperatures between -30 degrees and 150 degrees C," said Bob Voekel, Olflex applications engineer.

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