Set the thrust requirement
Required static thrust (kgf) = maximum takeoff weight (kg) × target thrust-to-weight ratio. Fixed-wing targets span 0.15–0.45; VTOL targets span 1.30–1.50.
Your aircraft.
The right EDF configuration.
Start with takeoff weight. See the thrust you need, the units it takes, and the power and mass behind each choice.
Suggested configurationContact Us
14units× 500 kgf
Standard · One EDF model · One unit or an even number
Total rated thrust7,000 kgf
Installed rated power2,240 kW
EDF unit mass1,260 kg
Achieved T/W1.458 T/W
Thrust oversizing 1.042×Thrust margin 4.2%EDF / MTOW 26.3%
Why this configuration
Standard quantity takes priority over Extended after eligibility checks. The alternatives retain useful engineering tradeoffs; this is a policy-based initial choice.
02 / Alternative configuration
Alternative configurations
Other configurations that meet the current selection rules, with their unit counts, power and mass.
| EDF model | Quantity | Total rated thrust / kgf | Installed rated power / kW | EDF unit mass / kg | Achieved T/W | Thrust oversizing |
|---|---|---|---|---|---|---|
| 200 kgfAlternative · Extended | 34 | 6,800 | 1,700 | 1,190 | 1.417 | 1.012× |
Excluded configurations
60 kgf112 units
- 112 units exceeds the extended limit of 36.
THE SIZING METHOD
From aircraft weight to an initial propulsion configuration.
Compare complete configurations
Each candidate uses one model: 60 kgf / 22 kW / 10 kg, 200 kgf / 50 kW / 35 kg, or 500 kgf / 160 kW / 90 kg per unit. Round the required count up, then round odd counts above one to the next even number.
Make the tradeoffs visible
Filter by quantity and thrust oversizing, prefer Standard to Extended, then compare power, mass, quantity and oversizing. The final selection balances relative power and mass costs without a fixed weighted score.
INTERACTIVE DIAGRAM
How an electric ducted fan produces thrust
Adjust input power, observe the airflow or separate the components to explore the internal structure. This illustrative model is independent of the sizing calculation above.
Explore the structure and operating principle of an electric ducted fan.
EDF sizing, explained.
What is the difference between EDF thrust and EDF sizing calculators?
A thrust calculator estimates a fan’s output from inputs such as diameter and power. This sizing calculator starts with aircraft type, MTOW and target T/W, then selects quantities from three specified Yuntu EDF models using their rated data.
What does maximum takeoff weight include?
MTOW is the total aircraft mass at takeoff, including the airframe, propulsion, energy system, payload and other equipment. Enter total takeoff weight, rather than payload alone.
Why can the achieved thrust-to-weight ratio exceed the target range?
The input range applies to target T/W. Discrete unit quantities can produce more thrust than requested. Eligibility is checked against the total-thrust oversizing limit, which defaults to 1.5×.
Why are one or two EDF units not recommended for VTOL?
The current preliminary policy classifies VTOL quantities below four as Special. They require a custom layout assessment. A raw requirement of three is rounded up to four before eligibility is evaluated.
Does the result estimate battery energy or flight endurance?
No. Installed rated power is quantity multiplied by unit rated power, and EDF mass covers the units alone. Battery sizing, actual mission consumption, cooling, installation and endurance require a separate engineering model.
What if there is no eligible configuration?
Review each model’s exclusion reasons and discuss them with the engineering team. The calculator does not automatically relax the oversizing limit, mix models or use maximum thrust.
Take the next step with our engineers.
Bring your aircraft parameters and the preliminary configuration to a propulsion discussion.