Air Vehicles for the Low Speed Air Economy

A Dual‑Mode e‑STOL & VTOL Aircraft with Solar‑Assisted Electric Propulsion

The single propeller pure electric propulsion system is combined to a revolutionary e-fuel based distributed propulsion system that makes vertical take-off both efficient and safe without adding stress to the battery. This e-fuel system is based on a compact, cost-effective automotive turbine-alternative units operating at low noise and an efficiency > 40%.

Dual‑Mode e‑STOL / VTOL Operation

The IFEVS aircraft gives pilots instant flexibility through two flight modes:

  • e‑STOL Mode (default) — pure‑electric short take‑off in under 15 m.
  • VTOL Mode (on demand) — vertical take‑off and landing for confined or hard‑to‑reach locations. Mode switch completes in under 2 s via a pilot‑friendly interface.

Electric cruise delivers best efficiency between 90 km/h and 110 km/h; maximum speed is limited to 150 km/h, with controllable flight down to 50 km/h.

Solar‑Powered Flight

A 10 m² array of 25 %‑efficient solar cells seamlessly integrated into the disc wing:

  • Harvests up to 40 km of free range per day.
  • Extends endurance and lessens dependence on ground charging.
  • Provides an emergency back‑up power source.

Cell efficiency is projected to reach 30 % by 2030, further boosting solar contribution.

Key Specifications

  • Dimensions (L × span)450 cm × 375 cm
  • MTOW300 kg (1‑seat) / 450 kg (2‑seat) / 600 kg (two seats and cargo)
  • Cruise Speed80–110 km/h
  • Max / Min Speed150 km/h / 50 km/h
  • Range (pure electric, 1‑seat)Up to 150 km at 100 km/h
  • Modular Battery Capacity30 kWh pack (single seat)
  • e‑Fuel Tank15 L (all versions)
  • Take‑off Distance (e‑STOL)< 15 m
  • e‑STOL ↔ VTOL switch< 2 s

Operational Flexibility & Safety at All Altitudes

Our disc‑wing architecture, distributed micro‑thrusters and low MTOW create a multi‑layer safety envelope—from vertical stabilisation in gusty cross‑winds to controlled descent even below 10 m.

Dual‑Mode Highlights

e‑STOL Mode

  • Under 15 m take‑off.

VTOL Mode

  • True vertical take‑off / landing in confined areas.
  • Micro‑thruster control for take-off and landing and strong lateral wind.

Seamless Transition

  • Automatic re‑configuration in under 2 s.
  • Emergency VTOL capability during take‑off or landing.

Core Safety Features

Passive Stall Resistance

Disc wing prevents sudden stall; controllability retained at high angles of attack.

Dynamic Parachute Effect

Distributed micro‑thrusters generate lift and drag to slow descent—effective even near ground level.

Cross‑Wind Stabilisation

Vectorable thrusters counter lateral gusts automatically, enhancing runway & rooftop safety.

Low Impact Energy

Low MTOW and stall speed reduce kinetic energy during forced landings.

Altitude RangeIFEVS ControlTraditional Parachute
0 – 10 mFull controlNo protection
10 – 50 mControlled descentHigh risk
50 m +Normal operationPartial effectiveness

Market Opportunities

The compact footprint, dual‑mode capability and solar‑boosted endurance open up a broad spectrum of applications:

  • Personal Mobility — rural commuting, tourism, point‑to‑point private air travel (5 000–10 000 units / year).
  • Agritech & Monitoring — crop inspection, land surveying, infrastructure checks (2 000–5 000 units / year).
  • Medical & Humanitarian — emergency supply delivery and disaster‑area access (500–1 000 units / year).
  • Search & Rescue / Fire Spotting — rapid deployment, long‑mission loiter thanks to solar power (300 + units / year).

Fast, Affordable Permit‑to‑Fly Pathway

The single‑seat version targets national ultralight permits (e.g. ENAC regulation 1139 of 4 July 2018), enabling a quicker, lower‑cost entry to market.