Vertipedia - HAL SA 315 Cheetah

License built version of the SA 315B Lama, the Cheetah has a gross weight of 2,300 kg; MTOW with a slung load is 1,850 kg. The aircraft can be equipped with an agricultural spray kit, making the MTOW 1,950 kg. Also, the helicopter has a passenger capacity of 3 plus the crew.

Overview

Data on design, manufacture and status

Design authority: Sud-Aviation

Primary manufacturer: Hindustan Aeronautics Limited

Parent type: HAL Alouette III

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: Skids

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:	3.09 m	10.1 ft
Overall Length:	12.91 m	42.4 ft
Overall Width:	11.00 m	36.1 ft

Airframe Dimensions
Airframe Length:	10.23 m	33.6 ft
Airframe Width:
Airframe Height:

Landing Gear Dimensions
Landing Gear Base:
Landing Gear Track:	2.38 m	7.8 ft

Cabin Dimensions
Cabin Internal Height:	1.28 m	4.2 ft
Cabin Internal Length:	2.10 m	6.9 ft
Cabin Internal Width:	1.40 m	4.6 ft

Cruise Speed: 190 km/h; Max Speed: 210 km/h;

Weights
Max Gross Weight (ground):	1,750 kg	3,858 lb
Max Gross Weight (airborne):
Max Take-off Weight:	1,750 kg	3,858 lb
Empty Weight:	995 kg	2,194 lb
Useful Load:	755 kg	1,664 lb
Empty Weight Fraction:	0.569

Climb Performance
Max Rate of Climb:

Hover Performance
Hover Ceiling IGE:	4,350 m	14,272 ft
Hover Ceiling OGE:	3,900 m	12,795 ft

Limitations
Max Level Flight Speed:
Never Exceed Speed:	150 km/h	81 kts
Service Ceiling:	7,000 m	22,966 ft

Range and Endurance
Max Range:	560 km	302 nm
Max Endurance:	3 hrs

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

Powerplant
Number of engines:	1
Designation:	Turbomeca Artouste IIIB turbine
Manufacturer:	Turbomeca

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

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

Main Rotor Characteristics
Diameter:	11.00 m	36.09 ft
RPM:
Direction of Rotation:	Unknown
Hub Type:

Main Rotor Blade Characteristics
Blade Construction:
Blade Chord:	0.350 m	1.15 ft
Blade Tip Geometry:
Blade Twist:
Number of Blades:	3

Main Rotor Derived Characteristics
Disc Area:	95.03 m²	1023.0 ft²
Disc Loading:	18.41 kg/m²	3.772 lb/ft²
Solidity:	0.0608

Main Rotor Blade Derived Characteristics
Blade area per blade:	1.92 m²	20.7 ft²
Tip Speed:

Tail Rotor Characteristics
Diameter:	1.91 m	6.27 ft
Configuration:	Unknown
Direction of Rotation:	Unknown
RPM:

Tail Rotor Blade Characteristics
Number of Blades:	3
Blade Construction:
Blade Chord:
Blade Twist:

Tail Rotor Derived Characteristics
Disc Area:	2.87 m²	30.8 ft²
Solidity:

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

References

References and sources used

Russian Helicopters, Ka-27

Russian Нelicopters, JSC
5 July 2017 (page 160)
Website

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 48)
Book