Specs updated August 5, 2026
Kaman
K-MAX
Unmanned cargo helicopter with turboshaft engine. 2h 41min internal fuel, 12+ hours with external tanks.
- MSRP
- $10,000,000
- Weight
- 2,334 kg
- Rated flight
- 150 min
- Wind level
- 15/15
- Range
- 400 km
- Operating
- −30 to 50 °C
Modelled flight time by conditions
Physics-based estimates from the same engine as our flight-time calculator, at 50% humidity over flat, open terrain. No pilot safety margin is applied — manufacturer data is the baseline, derated for each condition. The model is explained in our methodology.
| Wind | 0°C | 20°C | 35°C |
|---|---|---|---|
| Calm | 139 min | 148 min | 139 min |
| 10 mph | 136 min | 145 min | 137 min |
| 20 mph | 129 min | 133 min | 129 min |
| 30 mph | 120 min | 120 min | 120 min |
| Altitude (MSL) | Modelled flight time |
|---|---|
| 0 ft | 145 min |
| 2,000 ft | 142 min |
| 5,000 ft | 138 min |
| 10,000 ft | 130 min |
* Beyond a manufacturer's rated limit (wind, altitude) or outside the operating temperature range — shown for planning honesty, not as an endorsed operating condition. Beyond the wind rating the manufacturer's extreme-case time is shown; the model is not calibrated past that envelope. Altitude scenarios assume a sea-level launch site, where altitude MSL and AGL are equivalent; manufacturer altitude ceilings are quoted MSL. Estimates are modelled, not measured; always plan with a personal safety margin.