Vertipedia - Bell AH-1Z Viper

Overview

Data on design, manufacture and status

Latest or last design authority: Bell
Originally designed by Bell Helicopter Textron, Inc.

Primary manufacturer: Bell Helicopter Textron, Inc.

Parent type: Bell AH-1 SuperCobra

Aircraft status: Operational

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift devices: 1 Single main rotor

Dedicated control device: 1 Tail rotor

Crew required: 2 in Tandem arrangement

Landing gear: Skids

Aircraft Details

Data on aircraft configuration, weights, flight performance and equipment

Layout and Dimensions

Weights and Performance

Engine Details

Primary Lift Device

Primary Control Device

Overall Dimensions
Overall Height:	4.37 m	14.3 ft
Overall Length:	17.75 m	58.3 ft
Overall Width:	14.63 m	48.0 ft

Airframe Dimensions
Airframe Length:	13.67 m	44.8 ft
Airframe Width:	4.06 m	13.3 ft
Airframe Height:	3.76 m	12.3 ft

Landing Gear Dimensions
Landing Gear Base:
Landing Gear Track:	2.21 m	7.3 ft

Cabin Dimensions
Cabin Internal Height:
Cabin Internal Length:
Cabin Internal Width:

Weights
Max Gross Weight (ground):	8,391 kg	18,500 lb
Max Gross Weight (airborne):	8,391 kg	18,500 lb
Max Take-off Weight:	8,391 kg	18,500 lb
Empty Weight:	5,777 kg	12,736 lb
Useful Load:	2,615 kg	5,764 lb
Empty Weight Fraction:	0.688

Climb Performance
Max Rate of Climb:

Hover Performance
Hover Ceiling IGE:
Hover Ceiling OGE:

Limitations
Max Level Flight Speed:
Never Exceed Speed:	370 km/h	200 kts
Service Ceiling:	6,096 m	20,000 ft

Range and Endurance
Max Range:	232 km	125 nm
Max Endurance:

Provided powerplant data is for uninstalled, sea level, static operations.

Powerplant
Number of engines:	2
Designation:	GE T700-GE-401C turbine
Manufacturer:	GE Aviation

Normal Ratings
Max continuous:	1240 kW	1662 hp
Take-off / rated:
Intermediate:	1343 kW	1800 hp
Maximum:	1410 kW	1890 hp

OEI Ratings
OEI contingency:
OEI continuous:
OEI 30-second:	1447 kW	1940 hp
OEI intermediate:

Main Rotor Characteristics
Diameter:	14.63 m	48.00 ft
RPM:
Direction of Rotation:	Counterclockwise
Hub Type:

Main Rotor Blade Characteristics
Blade Construction:
Blade Chord:	0.635 m	2.08 ft
Blade Tip Geometry:	Swept, outer tip
Blade Twist:
Number of Blades:	4

Main Rotor Derived Characteristics
Disc Area:	168.11 m²	1809.6 ft²
Disc Loading:	49.92 kg/m²	10.223 lb/ft²
Solidity:	0.1105

Main Rotor Blade Derived Characteristics
Blade area per blade:	4.65 m²	50.0 ft²
Tip Speed:

Tail Rotor Characteristics
Diameter:
Configuration:	Pusher
Direction of Rotation:	Unknown
RPM:

Tail Rotor Blade Characteristics
Number of Blades:	4
Blade Construction:
Blade Chord:
Blade Twist:

Tail Rotor Derived Characteristics
Disc Area:
Solidity:

Tail Rotor Blade Derived Characteristics
Tip Speed:
Blade Area (per blade):

References

References and sources used

AH-1Z - NAVAIR

Naval Air Systems Command
H-1 USMC Light/Attack Helicopters website, 2014
Website

Bell AH-1Z

Bell Helicopter
Bell Helicopter corporate website, 2016
Website

H-1 Program: AH-1Z and UH-1Y 2012-2013, Issue 1

Bell Helicopter Textron, Inc.
Bell Helicopter Data and Brochures, 2013 (page 5)
Report or Technical Manual
Approved for Public Release – Unlimited Distribution. NAVAIR PMA 276 Control Number 2012-599