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Newsletter #391     | News

Cormorant UAV (formerly AirMule) Completes First Fully Autonomous Pattern Flight Over Terrain


Tactical Robotics from Israel announce its Cormorant Unmanned Air vehicle (UAV, formerly AirMule) prototype performed its first autonomous pattern flight including low flight over uneven terrain


  • Tactical Robotics from Israel announce its Cormorant Unmanned Air vehicle (UAV, formerly AirMule) prototype performed its first autonomous pattern flight including low flight over uneven terrain
  • Cormorant UAV (formerly AirMule) Completes First Fully Autonomous Pattern Flight Over Terrain


Tactical Robotics Ltd, November 14, 2016 - Tactical Robotics, a subsidiary of Urban Aeronautics, is pleased to announce that on November 3, 2016 its Cormorant Unmanned Air vehicle (UAV) prototype has performed its first autonomous pattern flight including low flight over uneven terrain.

While pattern flights are routine for conventional fixed wing aircraft and rotorcraft, it is a significant milestone in the evolution of an entirely new family of Urban’s proprietary technology aircraft known as Fancraft™. Unlike other (manned and unmanned) aircraft, the Cormorant's autopilot relies primarily on inertial and ground reference, which is more complex than flying through open, unobstructed airspace. This industry-first event begins to demonstrate the Cormorant’s capability to operate close to the ground and inside obstructed terrain, in environments previously inaccessible to existing aircraft (having similar payload).

Urban Aeronautics founder and industry-recognized entrepreneur Rafi Yoeli commented, “this flight paves the way forward for the immediate evolution of Cormorant from prototype to near-term production and ultimately commercialization of this groundbreaking technology - for broad applications and markets. This is the most exciting time in the Company’s history and we look forward to accelerating our progress now that the technology is fully proven.”

Building on the success of this first pattern flight, upcoming flights will test ongoing development to improve the smoothness of transitions through the various flight modes (takeoff, climb, acceleration, cruise, deceleration, descent, turns, hover and touchdown), in addition to increasing speed and maneuverability.

Below is some additional technical information related to the recent flight and also in general--the challenge of NOE (Nap of the Earth) flight:

Data from numerous sensors including two laser altimeters, a radar altimeter, inertial sensors, and an electro-optic payload camera are the foundation of the Flight Control System (FCS). In the future, obstacle avoidance sensors will also be installed. Based on the integrated data collected from the various sensor inputs, the Flight Management System (FMS) must "make a judgment" whether any momentary erroneous or inaccurate data from any individual sensor will or will not cause large deviations from the flight path. This amounts to a split second decision on whether to continue the mission, return home or make an immediate landing until further instructions.

The challenge in designing and testing an FMS for a configuration that is has never been addressed by standard flight control algorithms, is analogous to a novice pilot attempting to fly for the first time with an understanding of basic aerodynamic principles but no instructor.

As can be seen in the video, on this first ever autonomous pattern flight, there were three events where the FMS corrected itself in response to unexpected events.. Two instances were related to height above ground over the field (resulting from inaccuracies in laser beam return over uneven terrain and ground conditions). The third event is seen over the tarmac, caused by "poor judgement" on the part of the FCS, causing the aircraft to descend too early in its landing approach. While the FCS was 'learning' to fly the aircraft through the various pattern maneuvers, the FMS was continuously monitoring the level of safety, and making judgements regarding if and when to intervene.

As any pilot will testify, the first 'solo' pattern flight (especially in a rotary wing aircraft) is a significant achievement for a student pilot, human or non-human and we are proud of the way Cormorant carried out the challenge.


This article is listed in :
--Helicopters UAV & Drones
See also AirMule Completed its First Autonomous Untethered Flight

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