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Bell 525 Relentless vs Boeing Bbj Max 9 vs Piaggio Avanti Evo vs Robinson R66

The Bell 525 Relentless is a fly-by-wire, super‑medium helicopter aimed at executive and offshore missions; it typically carries around 12–16 passengers depending on layout, with a practical range on the order of roughly 500–600 nautical miles. The Robinson R66 is a much smaller, light single‑turbine helicopter suited to personal or utility flying; it seats about 4–5 including the pilot and has a much shorter range, roughly 300–350 nautical miles. The Piaggio Avanti EVO is a high‑speed, pressurized twin‑turboprop business aircraft; it generally seats 6–9 passengers and offers regional range, commonly around 1,400–1,800 nautical miles depending on reserves, payload, and conditions. The Boeing BBJ MAX 9 is a large VIP airliner based on the 737 MAX 9; it can be configured for very high passenger counts in airline form but, as a BBJ, is typically outfitted for perhaps a few dozen passengers in premium layouts, and it provides intercontinental range, roughly 6,000+ nautical miles.

SpecBell 525 RelentlessBoeing BBJ MAX 9Piaggio Avanti EVO
Summary
Cockpit222
Min Crew241
Total Seats18128
Flight RulesIFR—IFR
ManufacturerBellBoeingPiaggio
Aircraft Name525 RelentlessBBJ MAX 9Avanti EVO
CertificationFAA / EASAFAA / EASAFAA / EASA
Max Range (nm)58063761530
Max Cabin Seats16357
OEM VerificationVERIFIEDVERIFIEDUn-Verified
Useful Load (lbs)6675771203775
Standard Cabin Seats1686
Flight Deck (Base Spec)Garmin G5000HHoneywellRockwell Collins Pro Line 21
Max Cruise Speed (ktas)160470400
Base Aircraft Price (USD)$15,000,000$107,700,000$ 7,695,000
DOC / nm—$ 15.74—
DOC / nm / Seat—$ 1.97—
Direct Operating Cost—$ 7,396—
Cabin
Cockpit222
Min Crew241
Total Seats18108
Max Cabin Seats16357
Standard Cabin Seats1686
Configuration—Green Interior—
Cabin Pressure (psi)—99
SL Cabin Altitude (ft)—2400024000
Lavatory——No
Galley / Refreshment——No
Max Cabin Altitude (ft)——6600
Engine
FADECDual-ChannelYesYes
ModelCT7-2F1LEAP-1BPT6A–66B
Fuel TypeJetFuel——
TBO (hrs)4000On-Condition3600
Horsepower1800—850
No. of Engines222
Fuel Capacity (gal)641——
Flat Rating—ISA + 15ISA + 28
Thrust (lbs)—28000—
Fuel Burn (gph)——100
Dimensions
Width (ft)25.77——
Length (ft)61.58138.447.3
Cabin Width (ft)7.5811.66.1
Cabin Height (ft)4.57.15.8
Cabin Length (ft)15.5107.214.9
Overall Height (ft)18.1840.313.1
Rotor Diameter (ft)54.5——
Baggage Volume Ext. (cu. ft)1281485—
Wingspan (ft)—117.947.1
Aisle Step (ft)—Flat Floor—
Cabin Width - Floor (ft)—10.73.5
Cabin Length - Seating (ft)—100.6—
Baggage Volume Int. (cu. ft)——35.2