Helico	R66	R44 Raven I	R44 Raven II
Global	38 ‘ 3 ‘ ‘	38 ‘ 3 ‘ ‘	38 ‘ 3 ‘ ‘
Height-Cabin	6	6	6
Height-Rotor	137 “	129 “	129 “
Cab width	58 ‘ ‘	50 ½ “	50 ½ “
Total width	90 “	83 “	83 “
Main Rotor
Diameter	33 foot	33 foot	33 foot
Blade Chord	11.5 “Inboard	10 “Inboard	10 “Inboard
Tail Rotor
Diameter	60 “	58 “	58 “
Blade Chord	5.5 “	5.1 “	5.1 “
Weight comparison
Equipped with vacuum weight-EEW	1300	1440	1525
Fuel (full = 3 hr)	495	300	300
Total	1795	1740	1825
Gross weight max	2700	2400	2500
Weight available for Passengers & Cargo	905	660	675
Fuel
Capacity	280 liters	185 liters	185 liters
Estimated consumption	85 Litres/hr	55 Litres/hr	60 Litres/hr
Duration	3 hr +	3 hr +	3 hr +
Speed
VNE	140 knots	130 knots	130 knots
Cruising speed	115-120 knots	105 knots	105 knots