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Robinson Helicopters R44 Cadet vs Robinson Helicopters R44 Raven Ii vs Robinson Helicopters R66

All three aircraft are light, civilian helicopters, but they sit in different capability tiers. The Robinson R44 Cadet and R44 Raven II are both four-seat piston singles in the same basic family; the key practical difference is that the Cadet is optimized for training and lighter loads, while the Raven II is the more fully equipped, higher-gross-weight variant aimed at broader utility. In passenger terms, both are generally operated as up to four seats including the pilot, though real-world occupancy depends on fuel and weight limits. Their range is broadly similar—typically a few hundred nautical miles—again varying with fuel carried, power settings, and payload. The Robinson R66 moves up a class: it is a five-seat, single-turbine helicopter designed for higher performance, greater useful load, and more flexibility for passenger and mission equipment. Compared with either R44 variant, the R66 generally offers a longer practical range and better hot-and-high capability, while also carrying an additional passenger seat, making it the more capable choice for touring, light utility work, and faster point-to-point trips.

SpecROBINSON R44 CadetROBINSON R44 Raven IIROBINSON R66
Summary
DOC / nm$ 2.22$ 2.36$ 3.49
Total Seats245
Flight RulesVFRVFRVFR
ManufacturerRobinson HelicoptersRobinson HelicoptersRobinson Helicopters
Aircraft NameR44 CadetR44 Raven IIR66
CertificationFAA / EASAFAA / EASAFAA / EASA
Max Range (nm)300300350
DOC / nm / Seat$ 1.11$ 0.59$ 0.70
OEM VerificationUn-VerifiedUn-VerifiedUn-Verified
Useful Load (lbs)7639951355
Direct Operating Cost$ 238$ 257$ 384
Flight Deck (Base Spec)Gyro / AnalogGyro / AnalogGyro / Analog
Max Cruise Speed (ktas)107109110
Base Aircraft Price (USD) $344,000 $ 490,000$ 920,000
Cockpit2
Min Crew1
Standard Cabin Seats3
Cabin
Total Seats245
Cockpit2
Min Crew1
Standard Cabin Seats3
Engine
FADECNoNoNo
ModelO-540IO-540RR300
Fuel TypeAvGasAvGasJetFuel
TBO (hrs)220022002000
TBO (yrs)1212
Horsepower210245300
Fuel DeliveryCarburetedFuel Injected
No. of Engines111
Fuel Capacity (gal)29.529.573.6
Dimensions
Length (ft)38.338.338.3
Overall Height (ft)10.810.811.4
Rotor Diameter (ft)333333
Baggage Volume Int. (cu. ft)2.52.5
Cabin Volume (cu. ft)50
Baggage Volume Ext. (cu. ft)18