Holy Stone HS440G wind limit
Holy Stone’s rated wind resistance, recommended limits in every unit, and what a ground forecast means at 120 m.
Holy Stone rates the HS440G for winds up to 3.4 m/s (8 mph, 12 km/h, Level 3). A steady 15 mph (6.7 m/s) at flight height is 197% of that rating, which our score calls Outside your limits. For a comfortable margin keep sustained wind at altitude under 2.0 m/s (5 mph) and estimated gusts under 2.7 m/s (6 mph).
Wind limits in every unit
Our default go/no-go thresholds are a share of the maker’s rating: sustained wind up to 60% is within your limits, up to 85% is marginal; estimated gusts up to 80% are within, up to 100% marginal.
| m/s | km/h | mph | knots | Beaufort | |
|---|---|---|---|---|---|
| Holy Stone’s max wind rating | 3.4 | 12 | 8 | 7 | 3 |
| Sustained wind: within your limits up to (60%) | 2.0 | 7 | 5 | 4 | 2 |
| Sustained wind: marginal up to (85%) | 2.9 | 10 | 6 | 6 | 2 |
| Estimated gusts: within your limits up to (80%) | 2.7 | 10 | 6 | 5 | 2 |
| Estimated gusts: marginal up to (100%) | 3.4 | 12 | 8 | 7 | 3 |
What a ground forecast means at 120 m
Most forecasts give wind at 10 m. Higher up it is stronger. With the standard power law (α = 0.14 over open land by day, about 0.25 at night or over towns and forest), here is the sustained wind the HS440G meets at 120 m (400 ft), and how our score rates it. Altiwind uses the model’s own 80, 120 and 180 m winds where they exist.
| Wind at 10 m | 120 m, open land by day | Score | 120 m, night or urban | Score |
|---|---|---|---|---|
| 10 km/h (6 mph) | 14 km/h | Outside your limits | 19 km/h | Outside your limits |
| 15 km/h (9 mph) | 21 km/h | Outside your limits | 28 km/h | Outside your limits |
| 20 km/h (12 mph) | 28 km/h | Outside your limits | 37 km/h | Outside your limits |
| 25 km/h (16 mph) | 35 km/h | Outside your limits | 47 km/h | Outside your limits |
| 30 km/h (19 mph) | 42 km/h | Outside your limits | 56 km/h | Outside your limits |
| 35 km/h (22 mph) | 50 km/h | Outside your limits | 65 km/h | Outside your limits |
| 40 km/h (25 mph) | 57 km/h | Outside your limits | 74 km/h | Outside your limits |
Sustained wind only. Gusts come on top: Altiwind adds the forecast 10 m gust excess (gust minus mean, never less than 20% of the wind), so check the estimated gusts too. See wind at altitude and gust forecast. UAV Forecast also shows wind by height: how it compares with Altiwind.
Cold weather
Holy Stone rates the HS440G down to 0 °C. Batteries lose capacity in the cold well before that, so Altiwind marks every hour below 5 °C as marginal with a battery warning, and below 0 °C as outside your limits. A 0 °C lower limit is common for this class: below freezing, keep flights short and batteries warm until takeoff. More in flying drones in cold weather.
Rain and moisture
There is no water rating stated for the HS440G, so Altiwind treats rain as a limit: a rain chance of 20% or more is marginal and 50% or more is outside your limits. Fog and low cloud also cut visibility, which the score checks separately. See fog, rain and humidity.
Similar drones
- Holy Stone HS4405.4 m/s
- Holy Stone HS175D Plus5.5 m/s
- Holy Stone HS360D5.5 m/s
- Holy Stone HS360E5.5 m/s
- Holy Stone HS360G5.5 m/s
- Holy Stone HS175D7.9 m/s
Sources
- Holy Stone HS440G specifications (maker)
Not confirmed on the maker’s page: release year.
Temp stated as 32 to 104 F (0 to 40 C). Release year not found.
FAQ
Can the Holy Stone HS440G fly in 15 mph wind?
15 mph is 6.7 m/s, 197% of the 3.4 m/s rating from Holy Stone. Altiwind scores that as outside your limits for sustained wind at flight height. Gusts and the stronger wind higher up matter too.
What is the Holy Stone HS440G’s wind resistance level?
3.4 m/s (12 km/h, 8 mph), which is Level 3 on the Beaufort scale. That is the most the drone is designed to handle, not a comfortable working wind.
Can the Holy Stone HS440G fly in cold weather?
Holy Stone rates the HS440G down to 0 °C. Batteries lose capacity in the cold well before that, so Altiwind marks every hour below 5 °C as marginal with a battery warning, and below 0 °C as outside your limits. A 0 °C lower limit is common for this class: below freezing, keep flights short and batteries warm until takeoff.
Is the Holy Stone HS440G waterproof?
Holy Stone doesn’t state a water rating for it, so treat rain and wet fog as outside your limits.