Sikorsky’s upgraded S-61T helicopter completes maiden test flight

Sikorsky Aircraft has successfully completed maiden flight trials of upgraded S-61T Sea King helicopter, featuring an integrated glass cockpit and enhanced performance capabilities, at an undisclosed location.

The modernised helicopter features new composite main rotor blades (CMRB), a survivability suite, an advanced glass cockpit, as well as new electrical wiring in addition to a full structural refurbishment and overhaul of all major dynamic components.

The helicopters have been in the process of upgrading by the company since 2010, with an aim to return them to productive service.
Sikorsky S-61 programmes director Steven Rogers said the maiden flight trial represents a significant milestone in the S-61T’s upgrade programme.

"The modernised S-61T helicopter can be outfitted to meet a wide variety of requirements, and we believe it provides best-in-class-value for a mid-size, multi-mission helicopter," Rogers added.

Powered by two General Electric CT58-140 turboshaft engines, the S-61 helicopter has reliably performed a range of missions, including search and rescue (SAR), troop transport and amphibious anti-submarine warfare, for the US and foreign allied militaries over the past several decades.

Sikorsky is set to deliver up to 110 refurbished S-61 helicopters to the US Department of State (DoS) as part of a five-year indefinite delivery, set up in the indefinite quantity (IDIQ) agreement signed in February 2010.

The IDIQ purchase agreement serves as the contracting vehicle for any US government agency to acquire the new helicopter.