Djc said:
150 knots is not 280 mph, it's 180. A nautical mile is only slightly longer than a standard mile.
Just to keep things in perspective. Here are 4 of the most used attack helo's from around the world. Info from
www.fas.org
**AH-1W Huey SuperCobra
Specifications
Contractor: Bell Helicopter TEXTRON, Inc, General Electric, Kollsman Inc.
Power Plant: Two General Electric T700-GE-401 Turboshaft engines
Each engine delivers 1,690 horsepower.
Accommodations: Two seats, in tandem (pilot in rear, copilot/gunner in front)
Performance: Climb rate: 1,925 feet per minute
Maximum altitude: 14,750 feet
Maximum attainable speed: 170 knots (195 mph)
Maximum cruising speed: 152 knots (173 mph)
Countermeasures: AN/ALE-39 Chaff system and SUU-4/1 Flare dispensers
Armament: One M197 three barrel 20 mm gun (mounted under the nose with 750 round ammo container)
Underwing attachments for four TOW missiles, eight Hellfire missiles, or one AIM-9L Sidewinder missile
Can also be equipped with Zuni rocket launchers (2.75" FFAR's)
**AH-64D Apache Longbow
Specifications
Contractors Boeing McDonnell Douglas Helicopter Systems(Mesa, AZ)
General Electric (Lynn, MA)
Martin Marietta (Orlando, FL)
Propulsion Two T700-GE-701Cs
Crew Two
AH-64A AH-64D
Length 58.17 ft (17.73 m) 58.17 ft (17.73 m)
Height 15.24 ft (4.64 m) 13.30 ft (4.05 m)
Wing Span 17.15 ft (5.227 m) 17.15 ft (5.227 m)
11,800 pounds Empty 16,027 lb (7270 kg) Lot 1 Weight
Maximum Level Flight Speed 150 kt (279 kph)
[Sea Level Standard Day]
153 kt (284 kph)
Range 400 km - internal fuel
1,900 km - internal and external fuel
**SA341 Gazelle
Specifications
Country of Origin France & UK
Builder AEROSPATIALE, WESTLAND
Date of Introduction 1973
Role General utility
Blades Main rotor: 3
Tail rotor: 13 (fenestron enclosed in tail)
Rotor diameter Main Rotor Diameter: 10.5 meters
Tail Rotor Diameter: 0.7 meters
Length rotors turning: 11.9 meters
fuselage: 9.5 metres
Height 3.1 meters
Width 2.0 meters
Cargo Compartment Dimensions (m) Floor Length: 2.2 Width: 1.3 Height: 1.2
Standard Payload (kg) Internal load: 750
External on sling only: 700
Transports 3 troops or 1 litter, or cargo
Weight (kg) Maximum Gross: 1,800 (SA 341), 1,900 (SA 342K), 2,000 (SA 342L/M)
Normal Takeoff: 1,800
Empty: 998
Engines 1x 590-shp Turbomeca Astazou IIIB turboshaft
Fuel (liters) Internal: 445
Internal Aux Tank: 90
Additional Internal Aux Tank: 200
Range (km) Normal Load: 670 (SA 341), 735 (SA 342)
Speed (km/h) Maximum (level): 310
Cruise: 270
**MI-24 HIND
Specifications
Country of Origin Russia
Builder MIL
Date of Introduction 1976 (HIND D)
Role Assault, gunship, antitank
Similar Aircraft AH-1 Cobra (all models), UH-60 Black Hawk, AH-64 Apache, Mangusta A129
Blades Main rotor: 5
Tail rotor: 3
Rotor diameter Main Rotor : 17.3 meters
Tail Rotor: 3.9 meters
Wing span 6.5 meters
Length Length : 21.6 m (rotors turning)
Length : 17.5 m (fuselage)
Height 13 ft., 11 in.
6.5 meters (gear extended)
Cargo Compartment Dimensions Floor Length: 2.5 meters
Width: 1.5 meters
Height: 1.2 meters
Weight Maximum Gross: 11,500 kg
Normal Takeoff: 11,100 kg
Empty: 8,500 kg
Fuel Internal: 1,840 liters
Internal Aux Tank (in cabin): 1,227 liters
External Fuel Tank: 500 liters ea.
Engine 2 x 2,200 shp Isotov TV-3-117 turbines
Maximum speed 168 mph / 335 km/h
Cruising speed 295 km/h
Range Normal Load: 450 km
With Aux Fuel: 950 km