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Bell 525 Relentless vs Cessna 208b Grand Caravan Ex vs Enstrom 480b vs Piper M600 Sls

The Bell 525 Relentless and Enstrom 480B are helicopters, while the Cessna 208B Grand Caravan EX and Piper M600 SLS are fixed‑wing turboprops. For passenger capacity, the 208B is the hauler, typically configured around 9–14 seats depending on interior and regulations, making it the most practical for airline-style or utility loads. The Bell 525 is aimed at executive/crew transport and offshore missions, commonly seating about 12–16, generally comparable to or higher than the Caravan in upscale layouts but with different cabin tradeoffs. The Enstrom 480B is much smaller, usually 5 seats including the pilot, geared toward personal, training, and light utility roles. The Piper M600 SLS is a pressurized personal/business single, typically 6 seats. For range, the fixed‑wing turboprops generally go farther per unit fuel than helicopters. The M600 SLS typically offers the longest range (roughly ~1,000+ nm), the 208B is often in the mid range (~900–1,000 nm), the Bell 525 is generally shorter (often ~500–700 nm class), and the Enstrom 480B is shorter still (roughly ~300–400 nm class), varying by payload, reserves, and configuration.

SpecBell 525 RelentlessPiper M600 SLS
Summary
Cockpit22
Min Crew21
Total Seats186
Flight RulesIFRIFR
ManufacturerBellPiper
Aircraft Name525 RelentlessM600
CertificationFAA / EASAFAA / EASA
Max Range (nm)5801406
Max Cabin Seats16
OEM VerificationVERIFIEDVERIFIED
Useful Load (lbs)66752200
Standard Cabin Seats164
Flight Deck (Base Spec)Garmin G5000HGarmin G3000
Max Cruise Speed (ktas)160274
Base Aircraft Price (USD)$15,000,000$3,081,400
DOC / nm$ 2.19
DOC / nm / Seat$ 0.55
Direct Operating Cost$ 603
Cabin
Cockpit22
Min Crew21
Total Seats185
Max Cabin Seats16
Standard Cabin Seats164
LavatoryNo
Galley LocationMID
Cabin Pressure (psi)5.6
Galley / RefreshmentRefreshment Centre
SL Cabin Altitude (ft)12600
Max Cabin Altitude (ft)8644
Engine
FADECDual-ChannelNo
ModelCT7-2F1PT6A-42A
Fuel TypeJetFuel
TBO (hrs)40003600
Horsepower1800600
No. of Engines21
Fuel Capacity (gal)641260
Flat RatingISA + 55
Dimensions
Width (ft)25.77
Length (ft)61.5829.7
Cabin Width (ft)7.584.1
Cabin Height (ft)4.54
Cabin Length (ft)15.512.3
Overall Height (ft)18.1811.3
Rotor Diameter (ft)54.5
Baggage Volume Ext. (cu. ft)128
Wingspan (ft)43.2
Cabin Volume (cu. ft)165
Baggage Volume Int. (cu. ft)20