Main Menu

Enstrom 480 / TH-28


enstrom480

 

A number of models were developed and produced based on the body style of the 280. After preliminary market and design studies, Enstrom initiated the development of a larger, turbine-powered helicopter in 1988.


Primarily developed from the four-seat Model 280L Hawk, the Eagle prototype, based on a converted 280FX airframe, flew for the first time in December 1988, powered by Allison 250-C20W turbine, followed by a definitive aircraft (N8631E) with a wider cabin on 7 October 1989. The 480 initial version has a five-seat (two plus three) configuration with staggered seating for forward visibility from all seats. Easily reconfigured to three seats for training or executive transport; or pilot's seat only for transporting light cargo. Instrument panel centrally located above avionics console.


Announced in February 1990, the Eagle is powered by an Allison 250 turboshaft. The second 480/TH-28 (production prototype) flew in December 1991.
Initial FAA certification for the 480 was received on 7 June 1993; in December 1994, the approval was extended to FAR 27 standards.


A three-seat version, designated TH-28, was proposed by Enstrom for the US Army's New Training Helicopter (NTH) programme. Specially configured as a training light patrol helicopter: unique features include three crashworthy seats, crashworthy fuel system, and a large instrument panel which will accommodate dual instrumentation for either VFR or IFR training. Seating configuration allows training of two students simultaneously.


The TH-28 was flown first in 1990. A production representative helicopter made its maiden flight on 21 December 1991. The TH-28 was granted FAA certification to C.A.R. Part 6 standards in September 1992.


Turbine-powered certification of the TH28 came in September 1992 and the 480, to FAR Pt27 standards, in December 1994.


Development of the more capable 480B variant powered by the Rolls Royce/ Allison 250-C20W turbine powerplant had begun in the spring of 1999, and FAA certification of the new model was obtained on 9 February 2001. In August 2003, the UK CAA also certified the Enstrom 480B turbine helicopter.
The 480B basically equipped (2003) cost US$639,500, and features a high-inertia, three-blade, fully articulated main rotor system with upgraded main rotor gearbox, unboosted flight controls and high skid gear as standard equipment. The rotor speed is 372 rpm nominal; 385 rpm maximum permissible, and an anti-nodal vibrating cantilever beam to damp vibration at low speeds. The 480B cabin layout can be quickly reconfigured to seat one, three or five persons. A baggage compartment is in the tailboom.


Optional equipment includes emergency pop-out floats, air conditioning and cargo hook rated for external loads up to 454kg. The 480B can also be fitted with police patrol equipment including special police radios, searchlight, siren/PA sys

tem, FLIR and data recording facility.
The prototype, N480EN was exhibited at NBAA Convention, New Orleans, October 2000.

Production began in 1994 with initial deliveries to Europe. By June 2002, 43 480, 10 480B and four TH-28 had been registered. Final TH-28 produced in 1993 and delivered to China in 1993. Nine 480B delivered by mid-2003. Certified and operating in 14 countries: Australia, Belgium, Brazil, Canada, China, France, Germany, Japan, South Africa, Sweden, Switzerland, Thailand, UK and USA. In addition, 480 are also operating in Burkina Faso and Russian Federation. Customers include the Indonesian Police which ordered 18 480B in 2003.


TH-28
Engine: 1 x Allison 250-C20W.
Instant pwr: 313 kW.
Rotor dia: 9.8 m.
MTOW: 1293 kg.
Useful load: 533 kg.
Max speed: 122 kts.

Max cruise: 114 kts.
Max range: 765 km.
HIGE: 14,000 ft.
HOGE: 12,000 ft.
Service ceiling: 13,000 ft.
Crew: 1.
Seats: 3.

480
Engine: 1 x Allison 250-C20W, 212kW.
Instant pwr: 313 kW.
Rotor dia: 9.8 m.

Length: 8.92m
Height: 2.79m
MTOW: 1293 kg.
Useful load: 533 kg.

Max speed: 122 kts.
Max cruise: 114 kts.
Max range: 765 km.
HIGE: 14,000 ft.
HOGE: 12,000 ft.
Service ceiling: 13,000 ft.
Crew: 1.
Pax: 3/4.
Seats: 5.


480B

Engine: 313kW Rolls-Royce 250-C20W turboshaft, derated to 227kW take-off / 207kW continuous
Fuel capacity: 340 litres

 


enstrom-480


 

 


Copyright © 2017 all-aero. All Rights Reserved.
Joomla! is Free Software released under the GNU General Public License.