Hydra Technologies S4 Ehecatl

The S4 Ehécatl is an unmanned aerial vehicle developed and manufactured by Hydra Technologies of Mexico which, except for its infrared thermal sensor system, is the first of its type to be completely designed and manufactured in Mexico.

Named after Ehecatl, the Aztec god of the wind, it aims to provide safety for human lives in hazardous zones.

A prototype of the airplane was presented in the Paris Air Show at Le Bourget on June 19, 2007. In August 2007 at Washington D.C., a full-scale model was exhibited at the Association for Unmanned Vehicle Systems International (AUVSI) symposium, an aeronautics exposition with over 275 exhibitors. At the conclusion of the AUSVI symposium Hydra Technologies became the first non-U.S. recipient of the AUSVI’s ‘Al Aube Outstanding Contributor Award’ for the development of the S4 Ehécatl UAS (Unmanned Aerial System).

In 2008, Hydra Technologies received the Leonardo Da Vinci award, given by the International Aeronautics Congress of Mexico (CIAM for its Spanish abbreviation) for the development of the S4 Ehácatl, as well as the E1 Gavilán.

On August 3, 2008, the State of Jalisco and Coecytjal presented Hydra with an award in the 29th Annual National Convention of the National Chamber of Electronics, Telecommunications and Informatics Industry (CANIETI), for its contribution to the informatics, microelectronics and communications industries in Mexico.

The Ehécatl is an aerial unmanned surveillance system whose development began in 2002. Its principal market is directed towards providing security and surveillance capabilities in support of the Armed Forces, as well as civilian protection in hazardous situations. Because of its small size and unmanned nature, it can enter dangerous zones without being detected.

Apart from a U.S.-made FLIR infrared thermal sensor system, all of the S4 Ehécatl’s componentry and avionics are designed, developed and manufactured in Mexico by the firm Hydra Technologies. The S4 Ehécatl has an electronic system that is designed to provide up to eight hours of autonomous flight, in either daytime or nighttime conditions. The craft is controlled from a mobile central facility installed in a specially equipped three-man ground vehicle.

The surveillance capabilities of the UAV was suggested as an option to survey of the border problems between the U.S. and Mexico. The project developing the craft is a joint effort of the Mexican Federal Government, the Financial Sector, and Mexican academic and scientific institutions like CONACYT, the National Polytechnic Institute (IPN), the Autonomous University of Guadalajara and the Western Institute of Technology and Higher Education (ITESO).

The version for the Ehecatl ready for market as for December 2007 is the S4, having its first flight in 2006.
The system was designed for military and civilian use, including the Mexican Armed Forces.
It has a maximum velocity of 90 knots, with a maximum operating ceiling of 4,572 meters (15,000 ft) in height.
It can take-off from higher altitudes than 2,438 meters (7,999 ft).
It provides mode techniques for any type of weather or terrain.
All data is integrated by General Dynamics Advanced Information Systems.
The S4 model has a wingspan of 3.7 meters (12 ft), and MTOW of 54.43 kilograms (120 lb), including a payload of 9.07 kilograms (20 lb).
It has a flight autonomy of 8 hours at the cruising speed of 38 knots.

Mexico – The Mexican Secretariat of Public Security (Secretaría de Seguridad Pública, SSP).


Max. Takeoff Weight
Max Speed
S4 Ehecatl3.754.43167845729.07

MexicoHydra TechnologiesGuadalajara,Jalisco