Bell 525 Relentless vs Embraer Legacy 650 E vs Piper M600 Sls vs Robinson R66
The Bell 525 Relentless and Robinson R66 are helicopters, while the Embraer Legacy 650E and Piper M600 SLS are fixed‑wing airplanes, so their strengths differ sharply. The Legacy 650E is a large long‑range business jet designed for intercontinental missions, offering the greatest range of the four and the highest passenger capacity (typically around a dozen passengers, depending on cabin layout). The Piper M600 SLS is a single‑engine turboprop aimed at owner‑pilots; it carries about five to six passengers plus a pilot and has midrange capability suitable for regional trips rather than true long‑haul jet missions. The Bell 525 is a super‑medium helicopter focused on vertical lift flexibility and offshore or executive transport; it typically seats a larger group than the R66 and offers moderate helicopter range, but far less than either fixed‑wing airplane. The Robinson R66 is a light turbine helicopter with the smallest passenger capacity (about four passengers plus a pilot) and the shortest range in this set, prioritizing simplicity and lower operating scale over endurance.
| Spec | Bell 525 Relentless | Piper M600 SLS |
|---|---|---|
| Summary | ||
| Cockpit | 2 | 2 |
| Min Crew | 2 | 1 |
| Total Seats | 18 | 6 |
| Flight Rules | IFR | IFR |
| Manufacturer | Bell | Piper |
| Aircraft Name | 525 Relentless | M600 |
| Certification | FAA / EASA | FAA / EASA |
| Max Range (nm) | 580 | 1406 |
| Max Cabin Seats | 16 | — |
| OEM Verification | VERIFIED | VERIFIED |
| Useful Load (lbs) | 6675 | 2200 |
| Standard Cabin Seats | 16 | 4 |
| Flight Deck (Base Spec) | Garmin G5000H | Garmin G3000 |
| Max Cruise Speed (ktas) | 160 | 274 |
| Base Aircraft Price (USD) | $15,000,000 | $3,081,400 |
| DOC / nm | — | $ 2.19 |
| DOC / nm / Seat | — | $ 0.55 |
| Direct Operating Cost | — | $ 603 |
| Cabin | ||
| Cockpit | 2 | 2 |
| Min Crew | 2 | 1 |
| Total Seats | 18 | 5 |
| Max Cabin Seats | 16 | — |
| Standard Cabin Seats | 16 | 4 |
| Lavatory | — | No |
| Galley Location | — | MID |
| Cabin Pressure (psi) | — | 5.6 |
| Galley / Refreshment | — | Refreshment Centre |
| SL Cabin Altitude (ft) | — | 12600 |
| Max Cabin Altitude (ft) | — | 8644 |
| Engine | ||
| FADEC | Dual-Channel | No |
| Model | CT7-2F1 | PT6A-42A |
| Fuel Type | JetFuel | — |
| TBO (hrs) | 4000 | 3600 |
| Horsepower | 1800 | 600 |
| No. of Engines | 2 | 1 |
| Fuel Capacity (gal) | 641 | 260 |
| Flat Rating | — | ISA + 55 |
| Dimensions | ||
| Width (ft) | 25.77 | — |
| Length (ft) | 61.58 | 29.7 |
| Cabin Width (ft) | 7.58 | 4.1 |
| Cabin Height (ft) | 4.5 | 4 |
| Cabin Length (ft) | 15.5 | 12.3 |
| Overall Height (ft) | 18.18 | 11.3 |
| 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 |