| Specifications |
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Contractor | Bell Aircraft
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Powerplant | Model 250-C20J.
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Manufacturer | Allison Gas Turbine Divi-sion formerly of Rolls Royce.
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Rated shaft horsepower | (SHP): 420 SHP. The engine is limited to 317 SHP by the transmission.
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Takeoff power | (MAX TQ AVAIL)--317 SHP @ 100% TQ. 5 Minute limit.
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Maximum continuous power | (TQ AVAIL CONT)--270 SHP @ 85% TQ.
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Maximum transient power | 348 SHP @ 110% TQ. 5 Second limit. INTENTIONAL USE PROHIBITED.
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RPM @ output gearshaft | 6016.
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Main rotor | 2 blades.
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Diameter | 33 feet, 4 inches.
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| Asymmetrical "droop snoot" design.
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Blade twist | -10 degrees root to tip.
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RPM @ 100% N2 | 394.
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Tail rotor | 2 blades.
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Diameter | 5 feet, 5 inches.
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Blade angle @ full left pedal | 23 degrees.
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RPM @ 100% N2 | 2560.
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Maximum Gross Weight Limitations |
For hovering and flight--3200 pounds.
For ramp operations--3300 pounds.
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Airspeed limitations (KIAS) |
Vne--130 kts.
Maximum airspeed with more than 3,000 lbs GW--122 kts.
Maximum airspeed (IMC)--110 kts or placarded Vne, whichever is less.
Minimum airspeed (IMC)--50 kts.
Minimum climb airspeed (IMC)--70 kts.
Maximum airspeed crew doors removed--110 kts or placarded Vne, whichever is less. VFR configuration only.
Maximum airspeed cargo doors removed--87 kts.
Maximum airspeed autorotation--100 kts.
Maximum airspeed with 85-100% TQ--80 kts.
Minimum rate of descent--52 kts @ 394 rotor RPM.
Maximum glide distance--69kts @ 394 rotor RPM.
Engine failure (autorotation)--52-69 kts
Cruise--90 kts.
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| Crew | One pilot, four students
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Minimum Flight Crew Limitations |
VFR--1 pilot @ 170 lbs minimum weight.
IFR--(IMC)--2 pilots.
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Fuel Limitations |
Primary--JP4 or Jet B usable at all temperatures.
Alternate--JP5, JP8, Jet A and Jet A1 usable above -25 degrees F (-32C) provided a minimum 8 psi fuel pressure exists or above 0 degrees F
(-17.8C) with 4 psi fuel pressure.
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Maximum capacity | 84.1 US gallons. Usable fuel--82.6 US gallons.
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