Price:
$
Model:
X4-1900H useful-time protocol
Wheelbase:
Trial identity begins with the archived 1900 mm X8 frame reference.
Flight Control:
Log the fuel-cell controller and propulsion revision used for each endurance run.
Empty Weight:
Define a test profile rather than treating 18 m/s as a target.
Power Battery:
Record both 6S 5300mAh auxiliary-pack labels in the test inputs.
Wingspan(without propellers):
Use the 1500 × 1500 × 650 mm unfolded entry only after preflight measurement.
Folded Size(without propellers):
The 900 × 800 × 650 mm folded size belongs in transport preparation, not performance proof.
Empty Weight:
Reweigh the configured aircraft instead of assuming the archived 14.5 kg empty mass.
Satellite Navigation System:
List the actual GNSS receiver and RTK service in the endurance log.
Endurance Time:
Two hours is an archived payload-free result; repeat it under declared conditions.
Maximum Horizontal Speed:
Define a test profile rather than treating 18 m/s as a target.
Image Transmission:
Name the link model and operating conditions used during the timed route.
Electronic Speed Controller:
Capture fuel-cell output telemetry; 48 V and 3 kW are archive references.
The X4-1900H archive records a two-hour duration without carried equipment, alongside a 48V 3kW fuel-cell reference, 12L cylinder at 350 bar, dual 6S 5300mAh batteries and a 1900mm folding X8 frame. A procurement decision needs more than elapsed time. The acceptance plan should state fuel quantity, battery state, warm-up, installed sensor, weather, route, reserve trigger and post-flight records.
| Phase | Record | Reason |
|---|---|---|
| Before start | Fuel, battery state, sensor, mass and weather | Establish repeatable initial conditions |
| During flight | Elapsed time, power status, route and anomalies | Distinguish useful work from holding time |
| Reserve point | Trigger, remaining energy and recovery action | Protect a conservative landing margin |
| After shutdown | Fuel used, battery state, temperatures and inspection | Support comparison and maintenance |
Warm-up, take-off, transit, reserve and recovery consume part of the elapsed period. The project should define the time or area available for the actual inspection or monitoring task with the selected sensor.
Cylinder turnaround, filling access, storage, transport and inspection intervals affect daily output. Record those constraints alongside flight duration rather than presenting rapid refuelling as an unsupported general benefit.
Define whether it starts before fuel-cell warm-up, at arm, at take-off or at another recorded event.
Report useful work time plus transit and reserve, not only total elapsed time.
Keep fuel, battery, mass, route, weather, reserve and equipment revision in the same record format.
Provide the sensor, route and reserve policy so the endurance protocol reflects the actual civil project.
Tie any endurance result to the exact fuel, battery, payload, weather and reserve record.
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Tel: +86-13959965075
Email: info@fpvdroneskit.com
MP/WhatsApp: +86-13959965075
Manufacturer Address:Quanzhou Valley Nanan Science and Technology Innovation Center, No. 89 Shijing Avenue, Shijing Town, Nanan City, Fujian Province
The long-distance capabilities of this drone impressed me right away. It kept a reliable link out to several kilometers, and the sturdy build handled a few rough landings without issue. A solid choice for expansive FPV flights2025-12-30
This long range FPV drone did what I expected: extended signal and smooth video. Just be mindful of battery life and wind conditions — pushing too far without planning can risk signal loss or low power return2025-12-30
I regularly fly over fields and forest trails, and this long range FPV drone never disappoints. The signal range is excellent, and it’s stable even in moderate winds. It’s become my go-to for remote adventure flights and scenic FPV clips2025-12-30
I’ve tried several FPV drones, and this one stands out for quality and performance. The build feels solid, and the video feed is crystal clear. Definitely recommended for serious hobbyists.2025-12-29