Beechcraft King Air 360 Er vs Bell 525 Relentless vs Daher Tbm 960 vs Piper M600 Sls
The Beechcraft King Air 360ER is a twin‑turboprop, pressurized business/utility aircraft aimed at longer regional missions with strong runway flexibility. It offers roughly 1,500–1,800 nm range depending on load and reserves, and typically carries 6–9 passengers in executive configurations (higher seating possible in commuter layouts). The Daher TBM 960 is a high‑performance single‑engine turboprop optimized for speed and efficiency rather than cabin volume. Typical range is about 1,400–1,700 nm, with passenger capacity generally 4–6 plus a pilot, depending on interior and payload. The Piper M600 SLS is also a pressurized single‑engine turboprop, positioned a step below the TBM in speed and cabin size. Range is commonly around 1,200–1,500 nm, with typical seating for 4–5 passengers plus a pilot. The Bell 525 Relentless is a large, fly‑by‑wire helicopter focused on point‑to‑point access and vertical operations rather than fixed‑wing efficiency. Its range is roughly 500–600 nm, with typical seating around 12–16 passengers depending on configuration.
| Spec | Bell 525 Relentless | Daher TBM 960 | Piper M600 SLS |
|---|---|---|---|
| Summary | |||
| Cockpit | 2 | 2 | 2 |
| Min Crew | 2 | 1 | 1 |
| Total Seats | 18 | 6 | 6 |
| Flight Rules | IFR | IFR | IFR |
| Manufacturer | Bell | Daher TBM | Piper |
| Aircraft Name | 525 Relentless | TBM 960 | M600 |
| Certification | FAA / EASA | FAA / EASA | FAA / EASA |
| Max Range (nm) | 580 | 1730 | 1406 |
| Max Cabin Seats | 16 | — | — |
| OEM Verification | VERIFIED | Un-Verified | VERIFIED |
| Useful Load (lbs) | 6675 | 2908 | 2200 |
| Standard Cabin Seats | 16 | 4 | 4 |
| Flight Deck (Base Spec) | Garmin G5000H | Garmin G3000 | Garmin G3000 |
| Max Cruise Speed (ktas) | 160 | 330 | 274 |
| Base Aircraft Price (USD) | $15,000,000 | $4,450,000 | $3,081,400 |
| DOC / nm | — | $ 2.25 | $ 2.19 |
| Aircraft Type | — | Turbo Prop | — |
| DOC / nm / Seat | — | $ 0.56 | $ 0.55 |
| Direct Operating Cost | — | $ 744 | $ 603 |
| Cabin | |||
| Cockpit | 2 | 2 | 2 |
| Min Crew | 2 | 1 | 1 |
| Total Seats | 18 | 6 | 5 |
| Max Cabin Seats | 16 | — | — |
| Standard Cabin Seats | 16 | 4 | 4 |
| Lavatory | — | No | No |
| Galley Location | — | MID | MID |
| Cabin Pressure (psi) | — | 6.2 | 5.6 |
| SL Cabin Altitude (ft) | — | 14390 | 12600 |
| Galley / Refreshment | — | — | Refreshment Centre |
| Max Cabin Altitude (ft) | — | — | 8644 |
| Engine | |||
| FADEC | Dual-Channel | Yes | No |
| Model | CT7-2F1 | TBM 960 | PT6A-42A |
| Fuel Type | JetFuel | — | — |
| TBO (hrs) | 4000 | 3500 | 3600 |
| Horsepower | 1800 | 850 | 600 |
| No. of Engines | 2 | — | 1 |
| Fuel Capacity (gal) | 641 | — | 260 |
| Flat Rating | — | ISA + 49 | ISA + 55 |
| Dimensions | |||
| Width (ft) | 25.77 | — | — |
| Length (ft) | 61.58 | 35.3 | 29.7 |
| Cabin Width (ft) | 7.58 | 4 | 4.1 |
| Cabin Height (ft) | 4.5 | 4.1 | 4 |
| Cabin Length (ft) | 15.5 | 13.4 | 12.3 |
| Overall Height (ft) | 18.18 | — | 11.3 |
| Rotor Diameter (ft) | 54.5 | — | — |
| Baggage Volume Ext. (cu. ft) | 128 | — | — |
| Wingspan (ft) | — | 42.1 | 43.2 |
| Cabin Volume (cu. ft) | — | 123 | 165 |
| Baggage Volume Int. (cu. ft) | — | — | 20 |