Specs updated August 17, 2025
Saidynamics
BMR4 Marine
Salt-water resistant quadcopter designed for coastal and maritime operations with enhanced corrosion protection
- MSRP
- $21,000
- Weight
- 4.8 kg
- Rated flight
- 48 min
- Wind level
- 8/15
- Range
- 16 km
- Operating
- −6 to 46 °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 | 43 min | 47 min | 43 min |
| 10 mph | 41 min | 44 min | 41 min |
| 20 mph | 36 min | 36 min | 36 min |
| 30 mph | 36 min | 36 min | 36 min |
| Altitude (MSL) | Modelled flight time |
|---|---|
| 0 ft | 44 min |
| 2,000 ft | 43 min* |
| 5,000 ft | 42 min* |
| 10,000 ft | 39 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.