Which is cheaper to operate, a multi-rotor or a VTOL fixed-wing?

Per flight hour, usually the multi-rotor — simpler mechanics, cheaper spares, and no launch/recovery system to maintain. Per surveyed square kilometre, often the VTOL fixed-wing, because one sortie covers what takes several multi-rotor sorties with the battery swaps and crew time each swap implies. The right unit of cost is the mission, not the hour.

Do VTOL fixed-wings need a runway?

Not the electric VTOL class. The AT-G07 we supply takes off and lands vertically with a 3 m wingspan and needs only a cleared spot roughly twice its size; it then transitions to efficient fixed-wing cruise. Hybrid VTOLs like the AT-G45 follow the same pattern at 100 kg maximum take-off mass.

How many batteries does a fleet need?

Plan around your turnaround, not your flight time. A 34-minute aircraft with 90-minute recharge needs three battery sets to fly continuously; a 220-minute endurance platform flies a whole shift on one. Battery count is often the largest operating-cost difference between the two classes.

Multi-rotor vs. VTOL Fixed-Wing: Total Cost of Ownership

Sticker prices invite the wrong comparison: a portable multi-rotor at $8,999, a 3 m electric VTOL at $29,493 and a 100 kg-payload quad at $33,080 are three different classes of machine, not three versions of one choice. Total cost of ownership is where the comparison actually happens, and it rewards the platform that finishes your mission in the fewest sorties, crews and spare-part cycles. This article runs the arithmetic with published numbers from the aircraft we manufacture and supply.

The purchase is the down payment

A professional UAV programme spends across five lines:

Cost line	Multi-rotor	VTOL fixed-wing
Aircraft	Lower for equivalent payload	Higher — two flight regimes in one airframe
Batteries	Many sets (short endurance)	Fewer sets (long endurance)
Crew per sortie	Pilot + observer, frequent swaps	Pilot + observer, fewer sorties
Transport/logistics	One case, hand-launch	Larger vehicle for 3 m+ wingspan
Training & transitions	Simple	VTOL transition training matters

The endurance column drives everything. The AT-ELF multi-rotor specifies 34 minutes at 1.4 kg (15 minutes at max 2.4 kg take-off). The AT-G07 electric VTOL specifies 220 minutes with 1 kg payload, 1.5 hours at 7 kg. Fix the mission at six hours of coverage and the arithmetic is explicit: about eleven ELF sorties with a battery swap between each, or two AT-G07 sorties at the 1 kg endurance figure. Each swap is crew time, landing-site time, and one more battery in the case.

Worked comparison: 40 km powerline corridor

Take a routine inspection task: a 40 km transmission corridor at 80 m AGL, one zoom pod, normal weather.

Multi-rotor (AT-ELF class): 20 km cruise range at empty weight means the corridor is at least two sorties with a repositioned ground station, plus swap time. Call it 3 flights, 2 battery cycles each, one full day with a two-person crew.
VTOL fixed-wing (AT-G07 class): 220 minutes endurance at 1 kg covers the corridor in a single sortie at 20 m/s cruise. One flight, one battery set, half a day.

The aircraft price gap ($8,999 for the ELF versus $29,493 for the AT-G07) is real, but it is not the decisive number: the VTOL removes a repositioning day and two battery cycles from this mission. Whether that is worth the difference depends on how many days per year you fly the corridor.

Now invert it: the same corridor with a 6 kg dual-sensor pod. The AT-ELF's rated payload is 800 g (max 1,000 g) — it cannot carry the mission at all. The AT-G07 carries 7 kg. The comparison was never between two aircraft; it was between a mission and a specification sheet.

Where multi-rotors win outright

Three honest cases keep multi-rotors in the fleet:

Hover-and-stare work. Structure close-ins, confined-site inspection, anything requiring a stationary camera for minutes. Fixed-wing forward flight cannot do this; the AT-ELF's direct-drive rotors (running at 30–50% of comparable rotor speeds, for low acoustic signature) are built for it.
Deployability. Folded under 100 × 100 × 470 mm, hand-launched, IPX3, −20 to +60 °C — the ELF goes where a 3 m wingspan cannot fit. Emergency response and maritime work from small boats live here.
Heavy lift today. When the payload is 100 kg, neither of the above applies and you buy a MT100 quad — 200 kg maximum take-off mass, 10 km control range, configured per build. Logistics does not care about elegance; it cares about the lift.

Where VTOL fixed-wing wins

Everything with area and time: mapping, survey, corridor inspection, long-endurance relay, search patterns. The hybrid tier extends the claim upward — the AT-G45 specifies 45 kg payload, 5 hours endurance, 5,000 m practical ceiling and 2.5 L/h fuel consumption at 26 m/s cruise. A multi-rotor fleet carrying 45 kg for five hours does not exist at any sane price; the VTOL does it with one airframe and a fuel tank.

The procurement trap is buying the VTOL for missions that end in a hover, or the multi-rotor for missions that end in a 60 km flight line. Both mistakes show up as a second aircraft purchase twelve months later.

The numbers that decide it

Before requesting quotations, write down four figures:

Mission radius or corridor length (drives endurance, and endurance drives battery count)
Payload mass including mount (drives class; check the payload-at-endurance pair, not the maxima)
Sorties per day (drives crew cost, the largest line over a year)
Launch environment (drives the multi-rotor/VTOL question directly — no runway needed for either, but space and transport differ)

Our catalogue prices every complete aircraft per SET with 14-day written quotations; the VTOL category and multi-rotor category list published specs model by model, and the mapping & survey application page walks the sortie-planning side. Send the four numbers and we will price the fleet, not just the aircraft — spares, battery sets and the link that covers the radius included.