Kaman K-Max Helicopter
Kaman K-Max Helicopter

Kaman K-Max Helicopter

The K-MAX series is produced by the Kaman Aerospace Corporation as part of the Kaman Corporation brand name.

The K-MAX is categorized as a “synchcropter” which is a helicopter making use of an intermeshing rotor system, the rotors turning in opposite directions and at opposing angles in such a way that they generate lift while steering clear of one another’s rotations.

The K-MAX is the first helicopter specifically designed, tested and certified for repetitive external lift operations such as logging, fire fighting, construction, reforestation and oil/mineral exploration. K-MAX is based around Kaman’s unique intermeshing “Synchro-Lift” rotor technology using counter-rotating main rotors and servo-flap system with no tail-rotor, ensuring that all the power goes directly to the rotors for lift.

K-MAX

Designed for single-pilot operation with no room for passenger the slim inline design the K-MAX allows for excellent views from the cockpit thanks to the bulged side canopy windows. The front view is similarly dominated by a large curved canopy piece and the pilot sits in a raised seat with a commanding vantage point. All critical controls are mounted on the cyclic and collective hand grips. An external instrument panel is thoughtfully set with critical mission gauges to keep the pilot’s eyes close to the situation when precise hovering is called for. The engine is fitted within a compartment at amidships, exhausting just above the empennage base through a cylindrical fixture. The twin rotor masts protrude from the topmost portion of the fuselage with each blade controlled by a mechanical servo-flap along the trailing edge. The servo-flaps negate the need for complicated and fault-prone hydraulic- or -electrically-powered systems. The empennage is set low and complemented by a pair of outboard vertical tail fins set on wingstubs. The tail is capped by a slender and tall vertical fin assembly. The heavy-duty undercarriage is of conventional layout, featuring two single-wheeled main landing gear legs and a single-wheeled nose landing gear leg, the latter found just under the sharp nose assembly. There is a specially-designed integrated cargo hook set up on a trolley system that allows the hook and cargo slide forwards and backwards along the fuselage underside.

The K-MAX airframe sports a running length of approximately 51 feet, 10 inches while her rotor diameter measures in at 48 feet, 3 inches. When at rest, the K-MAX stands at 13 feet, 7 inches. She weighs in at 5,145lb when empty and can take off at 12,000lb maximum. Powered by a single Textron-Lycoming T5317A-1 gas turbine, a commercial variant of the 1800shp T53-L-703 used by the military, the K-MAX powerplant has been derated to 1500shp to make it compatible with the transmission and to ensure longer engine life.

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