Back Groen Hawk H4
2000

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Groen Brothers has been working on its Hawk Gyroplane family since 1986. Prototypes leading up to the Hawk 4 include the Hawk I and H2X. The Hawk 4 Gyroplane is the first in a series of near VTOL-capable aircraft and is initially being developed and marketed to government agencies, with FAA certification not expected for at least two years. The RevCon 6G technology demonstrator uses the fuselage of a Cessna 337 as the basis of its fuselage and will be progressively modified into a gyrodyne by the addition of rotor blade mounted tipjets; Groen has offered its GyroLifter gyrodyne to the US Department of Defense. The company has a flight test facility at Buckeye, Arizona, where, on 12 July 2000, the prototype Jet Hawk 4T / Hawk 4 made its initial flight.

In July 2001, Groen announced plans to move to a new 18.580m2 facility at Phoenix, Arizona. The plant, which will cost US$14 million and employ 425, was intended to become operational by end 2002 and have the capacity to produce four aircraft per day, however this has lapsed.

In August 2001 the company concluded a joint venture with Al-Obayya Corporation to produce and market gyroplanes in Saudi Arabia. However, economic downturn of late 2001 resulted in 85 of 130-strong workforce being laid off. Earlier plans for Chinese assembly also appear to have lapsed.

Groen is also the parent of American Autogyro (AAJ), whose Sparrowhawk is described elsewhere.

GROEN HAWK 4

TYPE: four-seat autogyro

PROGRAMME: Based on proof-of-concept Hawk One (N4379X) first flown 26 September 1992; design started April 1996 and prototype two-seat H2X (N4412X) first flew 4 February 1997; later converted to three-seat Hawk III standard. First deliveries had been due June 1998, but design changes to H2X and later Hawk III in October 1998 resulted in Hawk 4. Initial aircraft (N402GB) first flew 29 September 1999, powered by a Continental piston engine, and made first vertical take-off on 9 December 1999; had flown 120 hours in 200 sorties by early April 2000. In September 2000 company switched certification effort to turbine-powered Hawk 4T (N403GB), which was renamed Hawk 4 at this time following abandonment of piston-engined version; the following October Groen changed its focus to seek government contracts for Hawk 4, slowing certification process for both piston- and turbine-powered versions until it sees market upturn.

On 28 December 2001, Groen announced contract with Utah Olympic Public Safety Command for lease of Hawk 4, beginning 20 January 2002, for security patrols at Salt Lake International Airport, equipped with video downlink system, Spectrolab SX-5 searchlight and additional radios; aircraft flew 75 hours in 67 operations.

CURRENT VERSIONS:

  • Hawk 4: Currently powered by 313kW Rolls-Royce 250-B17C turboprop; first flew (N403GB) 12 July 2000; originally intended for certification late 2001. Other changes include addition of underfins and taller landing gear. Two further prototypes under construction.

    Applications include airborne law enforcement., electronic news gathering, aerial surveillance, utility/passenger transport and aerial application.

  • Jet Hawk 4T: Original designation for turbine-powered version. Renamed Hawk 4 by 2002.

  • Hawk 8: Proposed eight-seat variant with four-blade rotor and 559kW turboprop engine.

CUSTOMERS: By May 2003, deposits on 148 aircraft had been taken, via 12 dealerships. Fractional ownership programme announced July 2001 but later dropped.

COSTS: Around US$749.000 (2003).

DESIGN FEATURES: Twin tailbooms supported by stub-wings which also house main landing gear; large twin stabilisers and rudders; with fixed horizontal tail surface mounted between the vertical tails. Two-blade, semi-rigid aluminium teetering rotor with swashplate. Rotor speed 270rpm.

FLYING CONTROLS: Patented collective pitch-controlled rotor head allows smooth vertical take-off (zero ground roll) and enhanced flight performance. Rotor brake is standard. Actuation by pushrods. Patented dual-control stack cyclic flight controls.

STRUCTURE: Steel mast and engine mounts; stressed skin aluminium semi-monocoque fuselage, tail unit, hub structure and propeller; composites nose, engine cowling and wingtips; acrylic windscreen and doors; glass fibre nosecone and engine cowling.

LANDING GEAR: Initially fixed tricycle type; with electrohydraulically operated retractable gear to be offered later. Mainwheel tyres 6.00x6; nosewheel 5.00x5; Cleveland hydraulic brakes. Twin safety wheels at rear of tailbooms.

POWER PLANT: Production prototype for Hawk series was powered by a 134W Textron Lycoming O-360-A4M flat-four. Hawk H2X had one 335kW Geschwinder V-8 aluminium liquid-cooled engine, derated to 261kW at 2.500rpm, driving a Hartzell three-blade constant-speed propeller.

Hawk 4 piston-powered version has air-cooled, six-cylinder Teledyne Continental TSIO-550 rated at 261kW at 2.700rpm; prototype had four-blade MTV propeller but production models will have Hartzell three-blade constant-speed propeller. Engine provides power to rotor for prerotation to provide for short and vertical take-off capability; power to rotor system never engaged during flight. Hawk 4 turbine-powered version has one 313kW gas turbine engine driving three-blade constant-speed propeller.

Fuel capacity 284 litres in single tank at rear of fuselage; refuelling point at top of fuselage. Oil capacity 11.4 litres.

ACCOMMODATION: Pilot and up to three passengers in enclosed cabin in two pairs of seats; rear seats fold to provide baggage space.

SYSTEMS: Electrical system 28V DC.

AVIONICS: Comms: Honeywell KLX 135A GPS/COM, KT 76A transponder with Mode , 3000 intercom. Flight: United Instruments suite.

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Technical data for Hawk H4

Rotor diameter: 12.80m, fuselage length: 7.31m, overall height: 4.11m, empty weight: 835kg, max. take-off weight: 1587kg, max. speed: 238km/h, cruising speed at 75% power: 212km/h max. rate of climb at sea level: 457m/min, service seiling: 4875m, take-off run: 8m, range with max fuel at 75% power: 584km

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Comments 
Carpenter Y. Arpa, e-mail, 21.08.2017

Interested in being a distributor for this Aircraft here in the Philippines?

Frederick Muller, e-mail, 04.07.2017

Is the Hawk 4 (Groen Aeronautics) still in production? I understand there is a newer model. Whom can I contact for information?

David Boggs, e-mail, 10.10.2016

what is the price of this - - and where can i buy one

erbay, e-mail, 13.09.2016

How greetings price

Freddy Mendizabal, e-mail, 19.07.2016

Our Company are in process to acquire a 4 seats Gyroplane request for info on
Hawk h4 present sale dealer price and technical details.
Mentex Aircrafts

Thomas Russell, e-mail, 10.05.2016

I live in Edmonton Alberta Canada and am wondering what license do I need so I can fly one of your 3 or 4 seated gyro machines?

Antonio Mariscal, e-mail, 29.12.2015

Sir,

We are direct provider for BG, SBLC and MTN which are specifically for lease with the best workable procedures. Our BG ranges from MT799, MT760,(Both two way confirmation), MT103/23, MT103 (Both can be one way confirmation and two way confirmation) in USD and EUROS. Issuing Bank ranges from Top world 25 banks with face value ranging from 5M EUROS/USD to IB EUROS/USD

BROKERS ARE WELCOME & 100% PROTECTED!!!
Intermediaries/Consultants/Brokers are welcome to bring their clients and cases to our attention and in complete confidence we will work together for the benefits of all parties involve

For further details contact us with the below information Thank you.



Mr.Antonio Mariscal
For further inquiries:
Contact Email : broker.mariscal@gmail.com
Skype: broker.mariscal

ali mirzaloo, e-mail, 29.12.2015

hello ,i saw your really beautifull& strong six cylinders gyro .would you please let me know how i costs each one?may i be your share (my mean the first one )in my country please let me know. i hope this will happen very soon. i,m retired of air force .i have A&P E(instrument)&also i got my license from USA(lack land AF base)i,m familiare witch CHIct to markets in NOOK CH47-C,214-c,412.2seats ultra light TECNAM. in- respe to good rkets in my country you,ll have more benifit. your Sincerely
on 1976.(genera INST)

ronny mcginn, e-mail, 12.11.2015

iam in training in a raf 2000 gyroplane, I seen this hawk 4 on the web, im sure interested in one of these, I believe it would be more beneficial for me on the ranch, I would love to talk to someone about this craft, thanks

Almutairi Abdulrazaq, e-mail, 13.10.2015

Dear Sir,


We are Providers of all types of BG and MTN with the best workable procedures. Our BG ranges from MT799, MT760,(Both two way confirmation), MT103/23, MT103 (Both can be one way confirmation and two way confirmation) in USD and EUROS. Issuing Bank ranges from Top world 25 banks with face value ranging from 5M EUROS/USD to IB EUROS/USD

BROKERS ARE WELCOME & 100% PROTECTED!!!
Intermediaries/Consultants/Brokers are welcome to bring their clients and cases to our attention and in complete confidence we will work together for the benefits of all parties involve

For further details contact us with the below information Thank you.



Mr.Almutairi Abdulrazaq
For further inquiries:
Contact Email : broker.mutairi@gmail.com
Skype: broker.mutairi

Johan, e-mail, 13.10.2015

Hi. This qualified Flight Instructor would like to aquire all information on buying a Hawk4 Turbine driven Gyroplane from Groem Brothers (PayPal payment, Finance . . . etc. Please also email me all: service hour time, running cost per hour (service included), spares, shipping of a kit and spares, delivery time, availability . . . and all else. Waiting . . . Thanx!!!

KevinHsiung, e-mail, 30.04.2015

Dear Sir,
I would like to know about the price and the lead time of this aircraft. Thank you.

Luis Carlos Medeiros, e-mail, 07.04.2015

maquina espetacular

Pete Nicolazzi, e-mail, 07.02.2015

Can one purchase a Groen Brothers gyrocopter are they still being manufactured, I heard they went out of business I can not fine any updates to confirm this any updates would be appreciate. Thank you Pete

Pete Nicolazzi, e-mail, 21.01.2015

When will the Arrow Hawk be available to be purchase in the USA.What news updates are out on the Groen Brothers Gyrocopters. Thank you Pete

Tom, e-mail, 27.10.2014

Folks, why don't you put the answers to all the questions on your site. Tom I believe it will stop all the stupid questions that people call you about on the phone. Tom

danial, e-mail, 19.10.2014

Hi
I would like to know the price of the aircraft, and how much time can be made ​​available, and are sold to other countries.

Flvio Cruz, e-mail, 29.08.2014

I would like to know the price of the aircraft, and how much time can be made ​​available, and are sold to other countries.

David, e-mail, 15.07.2014

I am very impressed by your Hawk 4. Would be interested in interior pictures of the aircraft if this is possible. And to ask if the Hawk 4 is still in production for purchase? Thank for your time on this subject.

mw, e-mail, 22.06.2014

I would like to know if I can buy one in south africa or import it directly from you and where can I get training to fly it.Thanx

Marius, e-mail, 14.05.2014

I'm situated in South Africa. How can I acquire the hawk 4 and at what price? Thank you much

Ethan, e-mail, 23.03.2014

Hi,

Can you please confirm that the Hawk 4 is still in production and available for purchase?

Thanks.

N. Frank Winters, e-mail, 12.02.2014

Wondering why there are no interior photos for the Hawk 4. NF,Thanks

Jochen, e-mail, 05.02.2014

Hi. What is your current model you have to offer. We are in South
Africa, can it be shipped in kit form? What type of pilot licence is needed? And what is the current price for a four seater? With thanks.

Andrey, e-mail, 14.10.2012

how to build

Saeed Al Musallam, e-mail, 16.08.2012

Dear Ms.

I would like to know more about your products the whole range of gyrocopters, sale after sale service and spare parts. I would like to represent your company in the middle east and africa for new and second hand or even do a joint venture and build an assembly plant.
Your cooperation on the above matter will be highly appreciated.

Saeed Al Musallam

William Coln, e-mail, 31.07.2012

Are you still active, Do you g=have a prototype left you would like to sell?

Paul Perkins, e-mail, 28.04.2012

Do you for see the Hawk 4 being sold to the General Aviation? And if so at what point will this happen? Can you buy it now as a kit aircraft? And at what cost would that be in US dollars?
Thank You for your time.

Ersin EDZYREK, e-mail, 08.10.2011

Dear Sir or Madam
we are very interested in your production with hawk H4 Please send us dealer price end how to buy us.? What is your conditions for dealer.We will wait your answear as soon as possible. Very best regards, Arkan Aviation

Ersin EDZYREK
General Manager Ankara/TRKYE

joseph spezio, e-mail, 29.09.2011

i would like to learn how to fly and buy a hawk 4 please respond speziojoe@aol.com

виктор, e-mail, 13.08.2011

ястреб4.это кластно.надо наладить производство в россии.спрос будет.

Aero99, 24.06.2011

on youtube, the groen brothers aviation company has a youtube channel known as "Groen Aviation."

shoes, e-mail, 15.06.2011

want to ask you abut how this airplane not rotat aroud it self

JPH, e-mail, 25.06.2009

The aircraft does not rotate against the direction of rotor rotation because an autorotating rotor is in torque balance its axis of rotation, i.e all forces acting on the rotor system are resolved within the rotor system. Since torque is not supplied from a source within the fuselage, i.e. engine and shaft drive, there is no torque to react on the fuselage.

CHUCK, e-mail, 18.03.2009

I'd highly appreciate your sending of as many hi-res photos, drawings and YouTube type, downloadable videos of the Hawk 4T as possible to my e-mail address and to keep in touch with me regularly about the airplane's progress. It's somehow improbable for me to buy one at present but I'm ready to collaborate with you should any fluent technical and commercial translations into Spanish and Portuguese be required now or in the future.

John McCormack, e-mail, 08.06.2008

dealer price and more technical and safety information for Central America

Denis, 07.02.2008

It does not rotate because the small screw is a gyroscope not giving to rotate to it in a horizontal plane

Geo, e-mail, 25.10.2007

Where can we test fly this machine? When do you expect a 6 passenger version for commercial sale?

Steffan, e-mail, 12.09.2007

Is it possible to buy a striped verson of the JH 4T
W/O engine?

osama, e-mail, 12.05.2007

dear sir
i want to ask you abut how this airplane not rotat aroud it self

marc, e-mail, 07.03.2007

what is the price?

Do you have any comments concerning this aircraft ?

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