How far a hybrid VTOL drone really flies
Range, endurance and payload on a hybrid VTOL drone are a single trade curve. How lift-rotor drag, battery fraction and cruise speed set the number you can actually plan a mission around.
Datasheet range for a hybrid VTOL drone is a best case: light payload, still air, one-way. The number you plan a mission around is lower, and it moves with payload, wind and reserve. This post walks the trade.
Placeholder article — structure set, figures to be finalised.
The VTOL tax
Four lift rotors and their booms add mass and parasitic drag that a pure fixed-wing airframe does not carry. In cruise the rotors are dead weight. Expect a single-digit-percent endurance penalty versus an equivalent catapult-launched fixed-wing — paid back the moment you need to launch from a clearing. [placeholder — insert measured figure]
What actually sets endurance
- Battery fraction — usable pack energy over all-up weight.
- Cruise L/D — wing and fuselage efficiency at the mission speed.
- Payload draw — EO/IR turret, datalink and compute, continuous.
- Reserve — hold back 15–20 % for transition, loiter and a diverted recovery.
Planning table
| Config | Payload | Still-air radius | On-station endurance |
|---|---|---|---|
| VT-60 | 2 kg | 60 km | 2 h |
| VT-120 | 4 kg | 120 km | 3.5 h |
| VT-300 | 8 kg | 300 km | 6 h |
[placeholder — confirm against production spec]
Rules of thumb
[placeholder — headwind derate, payload-vs-range swap, relay to extend datalink]