November 29, 2015
VF-63, a 1999 Agusta-Bell AB412EP of Italian fire search and rescue, delivers a seriously injured soaring parachutist to a hospital.
The 412 structure incorporates many safety features including a rupture-resistant fuel system; jettisonable crew doors; sturdy construction and bulkheads for roll-over protection; wire strike protection on the nose; dual redundant electrical, hydraulic and fuel systems; dual digital flight control and a rugged high-reliability twin pack engine. It is also fitted with rotors and controls system, transmission drive systems, communication and navigation system, hydraulic and fuel systems, and dual digital flight control.
The cockpit has two crashworthy energy-absorbing pilot seats and collective mounted twist grip throttles, which allow the pilot to manage or adjust the power without releasing the primary flight controls. The helicopter is certified for single pilot instrument flight rules operation and can carry up to 15 people.
The avionics suite includes a three-axis autopilot to reduce crew workload and fatigue and allow the crew to concentrate on successful completion of the mission. The flight deck is fitted with a four-screen electronic flight information system.
Other avionics equipment includes: dual VHF radios, cockpit voice recorder, flight data recorder equipment, standby attitude indicator, MST-67A transponder, dual VOR/ILS/MB omni-directional radio range / instrument landing system / magnetic bearing, automatic direction finder, distance measuring equipment, radar altimeter, weather radar and an emergency locator transponder (ELT) system.
The cabin provides comfortable seating for up to 13 people. The cabin is fitted with four push-out windows for emergency egress. A 28ft³ baggage compartment in the tailboom can carry loads up to 180kg.
The helicopter can be fitted with an optional four-axis autopilot which provides "hands off" search and rescue procedures and also "hands off" automatic approach.
The 220ft³ capacity cabin configured for the emergency medical services role can carry up to six patients or survivors plus two medical attendants. An alternative configuration accommodates two critical stretcher patients and four medical attendants. Sliding doors, 2.34m wide, on both sides of the fuselage allow easy, safe and fast access for multiple patient loading or for loading life support units or neonatal intensive care units.
"The helicopter is certified for single pilot instrument flight rules operation."
The helicopter is powered by a Pratt & Whitney Canada turbo twin pack power plant model PT6T-3B-1 with two turboshaft engines producing a total 1,044kW take-off power and 843kW continuous power. For one-engine-inoperable flight a single engine can produce a maximum power of up to 723kW for 30 minutes. The operational history of the PT6 Twin-Pac engine records that the it has the lowest in-flight shutdown rate of any turboshaft engine.
The fuel tanks with total capacity of 1,249l comprise seven rupture-resistant tanks with breakaway automatic shut off valves. The Bell 412 can climb at the rate of 6.86m/s. The maximum and cruise speeds of the helicopter are 259km/h and 226km/h respectively. The range is 745km, which can be extended up to 980km. The service ceiling is 6,096m. The maximum endurance of the helicopter is three and half hours. The helicopter weighs around 2,920kg and its maximum take-off weight is 5,398kg. http://www.aerospace-technology.com/projects/bell-412/