Aviation

DARPA Selects Performer Teams for Liberty Lifter X-Plane Program

Darpa is involved in the development of a new form of seaplane that will have two cockpits and a huge span of wings and be able to transport significant quantities of supplies and personnel for a military base.

The concept video of the planning, which Darpa has produced, is a major development with numerous benefits for naval operations. The airplane will be propelled by a turboprop engine and will carry the cargo out of its nose door.

The planned Liberty Lifter demonstrator will be a large flying boat similar in size and capacity to the C-17 Globemaster III transport aircraft. Goals include takeoff and land in Sea State 4, sustained on-water operation up to Sea State 5, and extended flight close to the water in ground effect with the capability to fly out of ground effect at altitudes up to 10,000 feet above sea level.

Two teams — General Atomics working with Maritime Applied Physics Corporation and Aurora Flight Sciences working with Gibbs & Cox and ReconCraft — will develop designs for DARPA’s Liberty Lifter Seaplane Wing-in-Ground Effect full-scale demonstrator. The Liberty Lifter program aims to demonstrate a leap ahead in operational capability by designing, building, floating, and flying a long-range, low-cost X-Plane capable of a seaborne strategic and tactical heavy lift.

The General Atomics team has selected a twin-hull, mid-wing design to optimize on-water stability and seakeeping. It employs distributed propulsion using twelve turboshaft engines.

Aurora Flight Sciences’ point-of-departure design more closely resembles a traditional flying boat, with a single hull, high wing, and eight turboprops for primary propulsion.

During Phase 1, DARPA will work with both performer teams and Department of Defense stakeholders to refine the Liberty Lifter designs with particular attention to operational needs and operating concepts. The Phase 1 contract awards are for an 18-month period of performance with six months of conceptual design work and nine months of design maturation culminating in a preliminary design review. There will be an additional three months for manufacturing planning and test/demonstration planning reviews.

As scheduled, Phase 1 will transition into Phase 2 in mid-2024 with continued detailed design, manufacturing, and demonstration of a full-scale Liberty Lifter X-Plane. DARPA anticipates teaming with one or more DoD Service and international partners for those activities and further development of the Liberty Lifter concept into an operational vehicle.

Aviation

India Launches Its Medium-Lift Class Helicopter Program, chooses New Engine

India’s longstanding need for a Medium Helicopter may soon become a reality as the country has fully ramped up its engine development efforts. This new helicopter is set to replace the Russian-built models currently in service and will play a crucial role across various scenarios for the Indian Armed Forces.

Hindustan Aeronautics Limited (HAL) and SAFHAL Helicopter Engines Pvt. Ltd. (SAFHAL) have launched a groundbreaking partnership to develop a state-of-the-art high-power engine named Aravalli.

This new engine will power the upcoming 13-ton Medium Lift Helicopter (IMRH) and the Deck-Based Multi-Role Helicopter (DBMRH), both of which are being designed and developed by HAL.

Named after the majestic Aravalli mountain range in India, the Aravalli engine symbolizes the country’s drive for self-reliance, or Aatmanirbharta, in critical engine technologies. This cutting-edge engine will be instrumental for the IMRH, a versatile 13-ton multi-role helicopter designed to meet the needs of the Indian armed forces, and the DBMRH, a 12.5-ton naval variant tailored for the Indian Navy.

The IMRH is poised to become a cornerstone of the Indian armed forces over the next decade. With its first flight expected in 3 to 4 years, the IMRH is anticipated to begin induction by 2030, with plans to integrate between 300 to 400 units, and potentially more in the future.

The IMRH is envisioned as a highly versatile multi-role helicopter that will enhance the operational capabilities of the Indian military. The DBMRH, designed for naval operations, will also face the challenges of high-altitude environments in regions such as Ladakh, Sikkim, and Arunachal Pradesh—areas of strategic importance due to their proximity to the China border.

In addition to its military applications, the Aravalli engine is projected to enter the civil market, serving roles in offshore operations, utility services, and VVIP transport. The long-term vision includes Maintenance, Repair, and Overhaul (MRO) activities to further extend the engine’s utility and support the aviation industry.

This collaboration between HAL and SAFHAL builds on their successful history of working together on the Shakti engine, which powers several HAL helicopters, including the Advanced Light Helicopter Dhruv, the Light Combat Helicopter Prachand, and the Light Utility Helicopter. The proven success of this partnership lays a strong foundation for the development of the Aravalli engine, setting the stage for a new era in India’s helicopter capabilities.