Vertipedia - HAL Dhruv (PT4)

The fourth Dhruv prototype PT4/PT-N (IN901). The Indian Navy prototype, this model was equipped with retractable landing gear and the Shakti (Ardiden 1H1 in France) engine. The fuel capacity of the aircraft is 1,108 kg.

Overview

Data on design, manufacture and status

Design authority: Hindustan Aeronautics Limited

Primary manufacturer: Hindustan Aeronautics Limited

Parent type: HAL Dhruv

Aircraft status: Status unknown

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift devices: 1 Single main rotor

Dedicated control device: 1 Tail rotor

Crew required: 1-2 in Side-by-side arrangement

Landing gear: Wheels (all retractable)

Key Characteristics

Data on key physical features

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:
Overall Length:
Overall Width:

Airframe Dimensions
Airframe Length:
Airframe Width:
Airframe Height:

Landing Gear Dimensions
Landing Gear Base:
Landing Gear Track:

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

Weights
Max Gross Weight (ground):
Max Gross Weight (airborne):
Max Take-off Weight:
Empty Weight:

Climb Performance
Max Rate of Climb:

Hover Performance
Hover Ceiling IGE:
Hover Ceiling OGE:

Limitations
Max Level Flight Speed:
Never Exceed Speed:
Service Ceiling:

Range and Endurance
Max Range:
Max Endurance:

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

Powerplant
Number of engines:	2
Designation:	Turbomeca Ardiden 1H1 turbine
Manufacturer:	Turbomeca

Normal Ratings
Max continuous:	650 kW	871 hp
Take-off / rated:	741 kW	993 hp
Intermediate:
Maximum:

OEI Ratings
OEI contingency:
OEI continuous:
OEI 30-second:
OEI intermediate:

Main Rotor Characteristics
Diameter:
RPM:
Direction of Rotation:	Unknown
Hub Type:

Main Rotor Blade Characteristics
Blade Construction:	Composite
Blade Chord:
Blade Tip Geometry:
Blade Twist:
Number of Blades:	4

Main Rotor Derived Characteristics
Disc Area:
Disc Loading:
Solidity:

Main Rotor Blade Derived Characteristics
Blade area per blade:
Tip Speed:

Tail Rotor Characteristics
Diameter:
Configuration:	Unknown
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

Vertiflite, Spring 2011, India Special

AHS International
Hirschberg, Mike. "Frome Chetak to Dhruv: The History of HAL Helicopters". Vertiflite, Vol. 57, No. 1. 2011. Print., 2011 (page 50)
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