K-MAX Aerial Truck Helicopter

Kaman K-MAX K1200 Aerial Truck Helicopter
Built to Lift

Conceived and designed to perform repetitive external lifting, the K-MAX aerial truck performs these missions better than any other helicopter in the world. The single-engine, single-seat K-MAX is a rugged workhorse used globally for critical repetitive lifting, disaster response, and search and rescue operations. To date, the fleet has accumulated more than 340,000 flight hours since 1994.

K-MAX is a registered trademark of Kaman Aerospace Corporation.

Design

Simple, Safe, and Reliable

The K-MAX can lift more than its weight--6,000 pounds--and burns just 82 gallons of fuel per hour during lift operations, making it the most efficient lift-to-fuel ratio of any helicopter in its class.

The simple, straight-forward design that uses fewer aircraft systems, shortens the load path between the engine and rotor system, enhancing the airframe's ability to handle the stress loads generated between the rotor system and cargo hook assembly during repeated lifting exercises.

The key to the K-MAX helicopter's efficiency is an oversized intermeshing rotor system with servo-flap control. Operating without a tail rotor, all engine power is transferred directly to the large counter-rotating main rotors. What's more, the K-MAX maintains its power and performance at high altitudes and temperatures and requires less maintenance than helicopters with the traditional tail rotor configuration.

Cargo Hook and Trolley

The trolley system allows the cargo hook to move back and forth across the belly of the aircraft, enhancing load stability. The curved track in which the cargo hook rides is part of the heavily reinforced structure that delivers repeated and reliable lifting.

Vertical Reference Design and Innovation

An external instrument panel, strategically located outside of the cockpit of the aircraft, enables pilots to actively monitor performance during load operations. Additionally, the K-MAX operates with a minimum number of systems that require pilot action or monitoring. This means that the pilot can perform all normal and emergency procedures without removing hands or feet from controls.

The aluminum fuselage ranges in thickness from 0.065 inches to 0.125 inches for enhanced durability and safety, especially in critical areas such as the cockpit, fuel tank, and lower fuselage.

K-MAX Aerial Truck
design

Specifications

Weights and Measurements

Lift Performance — ISA +15°C (59°F)

Hover Performance — 4,000 feet, 35°C (95°F)

Powerplant

Maximum Airspeed

Fuel System

Max gross weight (with external load) 12,000 lb 5,443 kg
Max take-off weight 7,000 lb 3,175 kg
Empty weight 5,145 lb 2,334 kg
Useful load 6,855 lb 3,109 kg
Cargo hook capacity 6,000 lb 2,722 kg
Sea Level 6,000 lb 2,722 kg
5,000 feet 5,663 lb 2,574 kg
10,000 feet 5,163 lb 2,347 kg
15,000 feet 4,313 lb 1,960 kg
Hover IGE 12,000 lb 5,443 kg
Hover OGE 11,500 lb 5,216 kg
Model - Honeywell T53-17 gas turbine    
Thermodynamic rating 1,800 shaft horsepower 100 kt
Without external load 100 kt 185.2 kph
With external load 80 kt 148.2 kph
Total usable fuel 219.5 gal 831 liters
Avg fuel consumption 85 gal/hr 321.7 l/hr
Jet A fuel 557.6 lb/hr 252.9 kg/hr
Maximum endurance 12+ hr  
Maximum range 1,852km (est)  
Maximum speed with external load 148.2km/h  
Maximum speed without external load 148.2km/h  
Internal fuel endurance 2 hr 41 min  
Range with external load 396.3km  
Range without external load 494.5km  
Approved fuels Jet B/JP-4 Jet B/JP-4
specifications

Applications

Firefighting

From the US to Europe to Asia to Australia, the K-MAX helicopter is a superb tool in the fight against forest fires due to its ability to carry a significant quantity of water to the fire in hot and high environments. Utilizing a Bambi Bucket® to carry water, the K-MAX can refill the bucket at smaller sources of water that are closer to the fire, thereby putting more water on a fire, quicker.

 

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applications-kmax

Military and Defense

With a very successful deployment of the Unmanned K-MAX to Afghanistan with the US Marine Corps, this proven system is an asset to any force. Whether it’s taking supplies and equipment to forward locations, or bringing retrograde loads back to the main base, the Unmanned K-MAX can be a life saver by reducing the amount of ground convoys. And, the addition of additional sensor technologies make it a truly multi-purpose platform.

 

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Logging

The K-MAX helicopter started its commercial life in 1994 as a logging helicopter, and it remains a cost effective means to transport logs from the forest to the log landing. Its payload, and performance at altitude, make it an ideal platform for this very demanding operating environment.

 

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Power Line Construction

Power line projects are some of the most diverse and demanding projects for a helicopter. From carrying concrete for the foundations, erecting the towers, and finally stringing the power lines, all in austere environments, the rugged K-MAX helicopter is ideally suited for the tasks.

 

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Disaster Relief

When there is a crisis and people need help, and transportation on the ground is impeded, the K-MAX helicopter is ready to deliver the equipment and supplies to those who are cut off from the rest of the population. With a payload of 6,000 pounds at sea level, the K-MAX can quickly and accurately deliver supplies to those most in need.

 

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Ski Lift

Similar to power line projects in complexity – moving concrete for the foundations, erecting the towers, and finally stringing the lines – and doing all of this at higher altitudes, the intermeshing rotors of the K-MAX helicopter provide the necessary lift.

 

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Emergency Response

The K-MAX was designed to perform under the most extreme conditions and circumstances, maintaining full capabilities in hot temperatures and at high altitudes. This provides a measurable performance advantage for operators conducting rescue missions or dropping water on fires in mountanous areas.

Heavy-lift capabilities make the K-MAX ideal for disaster relief, as well. It is capable of working long hours while performing repeated lift operations, such as delivering supplies to areas devastated by floods, removing debris from earthquake-ravaged regions, or rescuing individuals trapped on top of a high rise building.

Kaman K-MAX Supporting Infrastructure Rebuilding in Puerto Rico
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