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Tactical Robotics in Negotiations with US Armed Forces

By Arie Egozi

Tactical Robotics (TRL) is currently continuing its discussions with the Israeli Defense Forces (IDF) about an order for a first batch of the Israeli company’s Cormorant VTOL UAS for cargo and casualty evacuation roles.

In parallel, the Israeli company is in different levels of talks with the US Armed Forces that are looking for a better Cargo and Medical Evacuation platform than current helicopters.

The design, based on more than a decade of development by Tactical Robotic’s holding company Urban Aeronautics , was originally inspired by the Piasecki VZ-8 Airgeep’s revolutionary design with two tandem ducted fans. However, that’s where the similarities end. Cormorant’s lift fans are powered by a single turboshaft turbine through three gearboxes and shafts.

The early prototype was powered by a Turbomeca Arriel 1D1, which was later replaced a Turbomeca Arriel 2. Originally the prototype lift fans had four-blade rotors, but the final fans have six-blade rotors with staggered-rotors for a speed variant.  One additional recent change is the elimination of the thruster fans, as it has been found that with a modification to the internal fuselage shape and a few additional aerodynamic enhancements it is possible to achieve the full flight envelope without the thrusters. 

According to the Israeli compnay, this will reduce weight and complexity, save 30 per cent of the width of the aircraft and also reduce contribute to lower signatures and higher survivability. The change has already been incorporated in the current prototype and a number of flights have already been performed with the change incorporated

The Cormorant’s fuselage is constructed from carbon (fiber)-composite. Two 770 liter (25 ft^3) volume compartments are designed to accommodate litters and casualties, with room for a variety of life support equipment.

The company says that Initial interior cabin noise was measured in flight at 95 decibels without any incorporated acoustic treatment or liners. An additional 1,100 liters are available in an optional belly mounted compartment. The fuselage forms an airfoil and generates over 50 per cent of lift at high speed aerodynamic bulge between the ducted fans keeps the airflow attached to it, hence generating lift, while diverting the airflow into the aft fan for increased lift and thrust.

 The Cormorant VTOL UAS recently demonstrated its capability to perform medical evacuation missions in combat zones.

The demo was performed at the Megiddo Airfield in Northern Israel, and included taking off with a load of cargo, performing a pre-planned flight to a specified point of delivery, offloading the cargo, and loading of a specialized, medical training manikin simulating a casualty which was then returned to the point of origin.

A monitor supplied by the Israeli defense forces (lDF) chief surgeon Trauma, transmitted vital information to the crews on the ground. This in addition to a video camera for two-way communication with the patient. With the exception of the loading of the ‘casualty’ and off—loading of cargo, the entire simulated mission was performed autonomously.

According to Rafi Yoeli president and CEO of Tactical Robotics, the demonstration, a combination of cargo delivery and casualty evacuation, reflects Cormorant’s unique dual—role capability as the only UAS recognized by NATO to fulfil both cargo delivery and CasEvac missions. He added that as such, the aircraft is designed to exceed the standard

reliability and handling qualities required of a typical. tactical UAV in order to meet the requirements to safely ferry human “cargo” back from the battlefield.

“We see the Israeli defense forces as our first customer and we have been working with their experts to define the needed capabilities” said Yoeli.

Yoeli added that the  Cormorant is the first UAS designed in accordance with FAA passenger carrying certification standards in order to be able to transport casualties or others needing evacuation from access challenged locations.  

The Cormorant is mainly aimed at Medical Evacuation in combat but also for emergency re supply missions.

The current Medical Evacuation operational doctrine, is based on helicopter evacuation as the main element of the pre-hospital military medical care system rather than ground ambulance . There are occasions when the tactical situation prevents helicopters reaching the casualty and thus the casualty will have to be moved by ground ambulance to a safe location for a helicopter landing site.

Israeli airforce sources say that the helicopter evacuation is mostly limited by the radius of its main rotor, the requires the preparation of a “clean” landing zone.

The ducted fans of the Cormorant allow landing in almost any point. ”The ducted fans also allow the Cormorant to evacuate from high risers. In that scenario the VTOL UAS actually touches a window or another opening in the building through which the wounded are being transferred to the aerial system”.

While the IDF is evaluating this unique VTOL UAS, the Israeli company is offering it to other armed forces including the US Army.

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