FPV Interceptor-Eco-Thermal: Practical Design with Low-Cost Passive Thermal Camera
Design Objective
Improve the night and low-visibility performance of the basic Ukrainian FPV Interceptor while keeping the price as low as possible.General Specifications
- Type: FPV kamikaze interceptor with passive thermal camera
- Target price: 2,850 – 3,650 USD (mass production)
- Operational range: 6 – 10 km
- Maximum speed: 140 – 160 km/h
- Flight time: 11 – 14 minutes
- Explosive payload: 400 – 500 g
- Total weight: 3.9 – 4.4 kg
Components and Estimated Costs
|
Component
|
Recommended Specification
|
Estimated Cost (USD)
|
|---|---|---|
|
Chassis and motors
|
Carbon fiber frame + 2207-2400KV brushless motors
|
850 – 1,100
|
|
Main camera
|
1080p FPV camera with IR pass filter
|
90 – 130
|
|
Thermal camera
|
320×240 passive thermal sensor (InfiRay or equivalent)
|
280 – 420
|
|
Processor
|
Raspberry Pi Zero 2W
|
60 – 90
|
|
Battery
|
6S 3200–3800 mAh LiPo
|
170 – 220
|
|
Video transmission
|
1.5–2.5 GHz digital system
|
130 – 180
|
|
Explosive payload
|
450 g + fragmentation casing
|
110 – 150
|
|
Integration and assembly
|
Labor + wiring + manual switch
|
160 – 230
|
|
Total estimated
|
—
|
2,850 – 3,620
|
System OperationThe operator flies normally using the main optical camera.
When it is night, smoky, foggy, or visibility is poor, the operator manually activates the thermal camera using a physical switch on the controller.
The thermal image appears in the goggles in Picture-in-Picture mode or with simple overlay.
The operator maintains full manual control at all times and guides the drone toward the thermal signature of the target.
Detonation occurs on direct impact or with a simple proximity fuse.Advantages
- Significantly improves night and low-visibility performance.
- The operator retains full manual control at all times.
- The price remains very competitive (only 600–800 USD more than the basic model).
- Easy to manufacture in the same Ukrainian workshops that already produce FPV drones.
Limitations
- The thermal camera is low resolution (320×240) — sufficient to detect the heat signature of a Shahed engine, but not for fine details.
- Everything depends on the operator’s skill (no automation).
- Flight time is slightly reduced when the thermal camera is used continuously.
- Additional cost: +600 to +1,000 USD per unit compared to the basic Ukrainian model.
- Main benefit: Much better performance at night and in poor visibility conditions, when Shahed drones are most commonly used.
- Verdict: Yes, it is worth it if the goal is to improve effectiveness in real combat conditions. The price increase is reasonable for the gain in capability.
It is a practical and balanced upgrade: not revolutionary, but useful and feasible for mass production.