Compare Curti Zefhir vs Enstrom Helicopter F-28F vs Robinson Helicopters R22 Beta II vs Robinson Helicopters R44 Raven I vs Robinson Helicopters R44 Raven II vs Robinson Helicopters R66

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Manufacturer	Curti	Enstrom Helicopter	Robinson Helicopters	Robinson Helicopters	Robinson Helicopters	Robinson Helicopters
Aircraft Type	Zefhir	F-28F	R22 Beta II	R44 Raven I	R44 Raven II	R66
Base Aircraft Price (USD)	$58,823	$ 550,000	$ 312,000	$ 412,000	$ 490,000	$ 920,000
Direct Operating Cost	-	$ 198	$ 173	$ 248	$ 257	$ 384
DOC / nm	-	$ 2.08	$ 1.80	$ 2.30	$ 2.36	$ 3.49
DOC / nm / Seat	-	$ 0.69	$ 0.90	$ 0.57	$ 0.59	$ 0.70
Max Cruise Speed (ktas)	-	95	96	108	109	110
Max Range (nm)	319	229	250	300	300	350
Useful Load (lbs)	-	960	490	950	995	1355
Total Seats	2	3	2	4	4	5
Cockpit	-	-	-	-	-	2
Standard Cabin Seats	-	-	-	-	-	3
Min Crew	-	-	-	-	-	1
Flight Deck (Base Spec)	-	Gyro / Analog	Gyro / Analog	Gyro / Analog	Gyro / Analog	Gyro / Analog
Flight Rules	-	VFR	VFR	VFR	VFR	VFR
Certification	-	FAA / EASA	FAA / EASA	FAA / EASA	FAA / EASA	FAA / EASA
OEM Verification	-	Un-Verified	Un-Verified	Un-Verified	Un-Verified	Un-Verified
MTOW (lbs)	-	2600	1370	2400	2500	2700
BEW (lbs)	-	1640	880	1450	1505	1345
Useful Load (lbs)	-	960	490	950	995	1355
Fuel Capacity (lbs)	-	238	157	279	279	493
Useful Load Max Fuel (lbs)	-	722	333	671	716	862
Max Baggage Weight (lbs)	699	-	-	-	-	-
Dimensions
Rotor Diameter (ft)	-	32	25.2	33	33	33
Overall Height (ft)	-	9	8.8	10.8	10.8	11.4
Length (ft)	-	28.1	28.5	38.3	38.3	38.3
Cabin Volume (cu. ft)	-	-	-	-	-	50
Baggage Volume Int. (cu. ft)	-	-	1.5	2.5	2.5	-
Baggage Volume Ext. (cu. ft)	-	6	-	-	-	18
Engine
No. of Engines	-	1	1	1	1	1
Manufacturer	Curti	Enstrom Helicopter	Robinson Helicopters	Robinson Helicopters	Robinson Helicopters	Robinson Helicopters
Model	-	HI0-360-F1AD	O-360	O-540	IO-540	RR300
Horsepower	-	225	131	225	245	300
FADEC	-	No	No	No	No	No
TBO (hrs)	-	1500	2000	2200	2200	2000
TBO (yrs)	-	12	12	12	12	-
Fuel Type	-	AvGas	AvGas	AvGas	AvGas	JetFuel
Fuel Delivery	-	-	Carbureted	Carbureted	Fuel Injected	-
Fuel Capacity (gal)	-	40	115	29.5	29.5	73.6
Avionics
Flight Deck	-	Gyro / Analog	Gyro / Analog	Gyro / Analog	Gyro / Analog	Gyro / Analog
Flight Rules	-	VFR	VFR	VFR	VFR	VFR
Transponder	-	1	1	1	1	1
VHF Com	-	1	1	1	1	1
VHF NAV	-	-	-	-	-	1
Cabin
Total Seats	2	3	2	4	4	5
Cockpit	-	-	-	-	-	2
Standard Cabin Seats	-	-	-	-	-	3
Min Crew	-	-	-	-	-	1
Other
Gear Type	-	Skids	Skids	Skids	Skids	Low Skids
Rotorhead	-	3-Blade Articulated	2-Blade Teetoring	2-Blade Teetoring	2-Blade Teetoring	2-Blade Teetoring
Tail Rotor	-	2-Blade	2-Blade	2-Blade	2-Blade	2-Blade
Performance
Max Cruise Speed (Mach)	185	-	-	-	-	-
Max Cruise Speed (ktas)	-	95	96	108	109	110
Long Range Cruise (ktas)	-	90	83	100	100	110
Max Speed (Vne)	-	97	102	130	130	130
Max Range (nm)	319	229	250	300	300	350
Range Seats Full (nm)	-	209	206	258	257	341
Max Climb Rate (fpm)	-	1150	1000	1000	1000	1000
Service Ceiling (ft)	-	12000	14000	14000	14000	14000
Hover IGE (ft)	-	7700	9400	6400	8950	10000
Hover OGE (ft)	-	-	-	-	-	10000