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BeitragVerfasst am: Mi Okt 08, 2014 15:38:38 
Titel: U.S. Coast Guard Retires Falcon HU-25 "Guardian"
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naja, das ist hart, wie der Pilot in dem Film, er steht vor einem der neuen Turboprops, die die HU 25 ersetzen, sagt..der Umstieg jetzt ist wie von einer Corvette auf einen Pick-Up Truck...

….HU-25 static display for the 30th Anniversary Ceremony held at ATC Mobile. The HU-25 has been in service with the CG since April 2nd, 1982 and has logged over 500,000 flight hours with an estimated 74,000 SAR flight hours and 244,000 LE hours. With the Falcons departing ATC and Corpus Christi in 2014, the USCG HU-25 era will come to an end, but they won’t stop inspiring and they won’t stop being part of the fabric of Coast Guard history – as one of the fastest overwater rescue assets of all time. HU25s are continuing to be national assets as 5 are currently serving with distinction at NASA and USAF facilities conducting research and national security missions…….



war sehr beeindruckend damals, als Dassault den Erfolg in den USA bei der CG hatte…

aber wie gesagt, Dassault war immer schon eine sehr "transatlantische" Firma…die Initialzündung für den enormen Erfolg der Falcon 20 wurde ja mit der Pan Am Bestellung damals gelegt…


Falcon Guardian

Origins and context

In July 1971, the United States Coast Guard launched the HX-XX Medium Range Surveillance (MRS) programme to replace its Grumman HU-16E Albatross seaplane. The aircraft had to be capable of performing surveillance, search and rescue and environmental protection missions along the coastline and over maritime zones under its control.

Falcon Guardian

With the Falcon 20 G, a version of the Falcon 20 F with Garrett ATF-3-6 turbofans in place of the original General Electric CF 700-2Ds, Dassault had a proposal capable of meeting the Coast Guard requirements.

The aircraft had been at the project stage since Dassault had developed the design in 1969. Certain adaptations were introduced in response to the Coast Guard requirements in terms of systems and instruments. Modifications included in-cabin rescue equipment, air-launched radio beacon, camera installation, extra tanks, adaptation of on-board electronics to US military standards and installation of three external load hardpoints.

On 5 January 1977, William T. Coleman, US Secretary of Transportation in the administration of President Gerald Ford, signed a contract for 41 Falcon 20 Gs ($204 million) under the designation HU-25 A (serials 2101 to 2141).

Dassault Aviation had managed to penetrate the ultra-closed US market in spite of the Buy American Act.

Two prototypes were built simultaneously, one in the USA, the other in France. The first Falcon 20 G (n° 362), the first aircraft to be equipped with two ATF-3 turbofans, flew in Mérignac on 28 November 1977, with Hervé Leprince-Ringuet at the controls. A Falcon 20 F (n° 371), modified to test the equipment and systems requested by the Coast Guard but retaining the CF 700 engines, flew at Falcon Jet Corporation in Little Rock (Arkansas) on 4 August 1978.

The aircraft was certificated by the French DGAC airworthiness authorities on 21 June 1981. Deliveries took place from February 1982 to December 1983.

The medium-range maritime surveillance model derived from the Falcon 20 G was designated HU-25 A Guardian. A total of 41 aircraft were completed in Little Rock. Seven aircraft were fitted with the “Aireye” system, designed to perform scientific and maritime environmental protection missions, particularly locating and monitoring oil spills.

Two Guardians were successfully used during the Gulf war in 1991 from a base in Bahrain, to monitor the movement of oil slicks along the Kuwaiti and Saudi Arabian coasts. Their mission availability was the highest among all the allied aircraft engaged in the conflict.

Specially equipped Coast Guard HU-25 Bs and Cs were actively used for drug interdiction missions along the US coastline.

In 1998, 17 aircraft were still operational at bases in Cape Cod (Massachusetts), Miami (Florida), Corpus Christi (Texas) and Mobile (Alabama).

The Guardian was particularly reputed for its reliability and comfort.

Falcon Gardian

In June 1977, the French Navy had to take account of its increased need for maritime surveillance equipment, following the progressive extension of the French economic exclusion zone up to 200 miles.

To perform its maritime patrol and maritime surveillance missions, replacing the Lockheed P-2H Neptunes which had reached the end of their service life in the 9 S and 12 S squadrons in the Pacific, the Naval Air Arm needed an aircraft capable of flying fast and changing altitude rapidly if the need arose. For safety reasons, it had to be a twin-engine design, capable of rapidly reaching a distant location and of covering an extensive maritime zone in the minimum time, and fitted with reliable and robust high-performance navigation and detection systems. In view of the need to operate in hot and humid conditions, the Naval Air Arm also wanted an aircraft requiring little maintenance and straightforward flight preparation.

Building on its experience with the HU-25 A Guardian, Dassault proposed to the French Navy a light twin adapted to the maritime surveillance mission and meeting the above criteria.

The Gardian was equipped with a navigation and surveillance suite including a Varan radar, adapted to the detection of small objects in heavy sea states, a Crouzet navigation system to visualise the tactical and geographical situation, a computer and automatic navigation table. A hatch was provided to air-drop rescue equipment, markers and, if need be, personnel. It was fitted with two large observation windows and four under-wing hardpoints capable of carrying significant loads (various sensors, target towing and countermeasures).

The aircraft were designed for four types of mission:

Search and rescue (SAR);
Enforcement of laws and treaties (ELT);
Maritime environmental protection (MEP);
Maritime and scientific activities (MSA).

The first Gardian, the navalised version of the Falcon 20 H, subsequently the Falcon 200, made its first flight at Mérignac on 24 April 1979, flown by Henry Suisse and Jean-Marie Barthelemy. Aircraft n° 48, the first aircraft of this type to come off the Bordeaux-Mérignac assembly line, made its first flight on 15 April 1981, under the control of Hervé Leprince-Ringuet (pilot) and Jean-Marie Barthelemy (test flight engineer). This pilot and the flight test team went on to conduct the final evaluation of the Gardian in collaboration with the CEV flight test centre.

On 13 May 1981, the French government, on behalf of the Navy, signed a contract covering development and production tooling for five Falcon Gardians in two batches of two and three aircraft, respectively. Aircraft n°48 was officially handed over on the same day.

In 1982 the aircraft performed demonstration tours for potential customers in the Middle East, India, Africa and Ireland.

On 14 April 1983, Gardian n° 1 was officially handed over to Admiral Leenhardt, the Navy Chief of Staff, by Benno-Claude Vallières.

Design studies were performed for a multi-role Gardian 2 version capable of performing five additional missions:

AM 39 Exocet attack;
electronic surveillance and countermeasures;
over-the-horizon target designation;
light attack;
target towing.

Die Gardian der französischen Marine wiederum war bereits eben eine Falcon 20H, (Commercial Name Falcon 200), die eben neben ein paar aerodynamischen Verbesserungen gegenüber der Falcon 20G, auch eben auch die damals neuen Garrett ( heute Honeywell) ATF-3 Treiber hatte, aber insofern ein anderes Flugzeug war, als die Falcon 200 systemmässig auf Falcon 50 Standard upgegraded war…

Heisst, hatte das modernere Electrical System der Falcon 50, Falcon 50 Pneumatics & Hydraulics und damals zivil eben auch ein First Generation Rockwell Collins EFIS Cockpit...
"don't follow leaders, watch your parking meters…" ( copyright: B. Dylan)
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BeitragVerfasst am: Sa Okt 25, 2014 09:50:58 
Titel: Garrett AiResearch ATF3
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für die technisch Interessierten, hier eine hervorragende web-site, die das sehr interessante Triebwerk, welches auf den U.S. Coast Guard Falcon 20Gs, aber eben auch auf den franzöischen Gardians und der zivilen Falcon 200 montiert war und ist, sehr gut erklärt.

Sehr komplex das Ding, anfänglich eher kontroversiell, hatte keinen langen Productionrun und ist nur in sehr geringer Stückzahl produziert worden..( wird aber heute noch hervorragend von Honeywell supported..)

aber eine hochinteressante Entwicklung für damalige Verhältnisse..

Die History, die Technik und die Anwendungen, sehr schön aufbereitet hier:

"don't follow leaders, watch your parking meters…" ( copyright: B. Dylan)
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