Single-engine aircraft

piston engine4-stroke enginevery light

Overview
The Ellipse is an ultralight aircraft designed and manufactured in the Czech Republic. It combines a unique carbon airframe with a refined interior, focusing on speed, safety, comfort and aerodynamic efficiency. The design is rooted in a tradition of precision and research and integrates modern materials and aerodynamics to deliver high performance and an enjoyable flying experience.

Exterior
The exterior consists of a carbon composite primary structure with a top layer including glass fibres to allow easy repair of minor scratches. The wing is elliptical to minimise induced drag and improve efficiency and handling. Wiring is integrated into laminate layers to preserve clean shapes and high aesthetic quality.

Interior
The cabin is one of the widest in its class, designed for long journeys with high-reclining seats. Cabin height and foot controls can be adjusted during configuration to suit individual pilots. The canopy offers excellent all-round visibility and the cabin features micro-ventilated side windows and an effective UV filter as standard.

Avionics
Each aircraft is equipped with top-tier avionics according to the pilot's choice. Preferred options include Kanardia (Nesis III), Garmin (G3X) and Dynon (SkyView HDX). Configurations range from full glass cockpit with integrated EMS, flight and navigation displays and autopilot, to hybrid setups combining analogue and electronic instruments.

Powerplant and Propellers
All Ellipse aircraft are equipped with ROTAX engines. Available engine installations: 915 iS, 912 iS and 912 ULS. Propeller options include MT-Propeller adjustable constant speed models (example MTV-33-1-A/175-200) and light carbon E-PROPS three-bladed propellers (170 cm diameter) that provide low noise and excellent performance.

Wing, Slots and Flaps
The aircraft features an elliptical wing for minimal induced drag and better overall performance. A shaped slot behind the leading edge increases lift and delays separation at low speeds, improving stall behaviour and short-field performance. The Ellipse uses a very efficient single-slot Fowler flap that extends beyond the wing outline in three positions to dramatically reduce landing speeds and shorten take-off distances.

Fuel tanks
Tanks are positioned in the wings with an available capacity up to 120 litres and are compatible with automotive gasoline including specified bio-component blends. Tanks include integrated baffles to minimize fuel slosh and easily accessible draining valves. Tanks can be locked for safety.

Landing gear
The Ellipse uses a robust electrically-operated retractable landing gear that pivots and retracts into the fuselage around a single axis. Extension/retraction is independent of the engine running. The gear incorporates shock absorbers and is designed for comfort and to cope with varied airfield surfaces.

Performance parameters (examples by engine)
ROTAX 915 iS
Stall speed flaps extended (SO): 71 km/h IAS
Stall speed flaps retracted (S1): 88 km/h IAS
Max. speed flaps extended (30°) (FE): 130 km/h IAS
Max. horizontal flight airspeed (H): 265 km/h TAS (measured at 4000 ft ISA)
Never exceed speed (NE): 304 km/h IAS
Take-off length (15 m obstacle, grass): 320 meters
Rate of climb: 7.67 m/s at 120 km/h
Rough airspeed (RA): 241 km/h IAS

ROTAX 912 iS (and ROTAX 912 ULS variants)
Stall speed flaps extended (SO): 71 km/h IAS
Stall speed flaps retracted (S1): 88 km/h IAS
Max. speed flaps extended (FE): 130 km/h IAS
Max. horizontal flight airspeed (H): 246 / 254 km/h TAS (FG/RG) depending on configuration
Never exceed speed (NE): 304 km/h IAS
Take-off length (15 m obstacle, grass): 350 meters
Rate of climb: 4.4 m/s at 120 km/h
Rough airspeed (RA): 241 km/h IAS

Aircraft parameters
Wing span: 8 m
Length: 6.55 m
Height: 2.02 m
Wing surfaces: 9.48 m²
Maximum take-off weight (MTOW): 600 kg
Maximum luggage weight: up to 15 kg
Standard fuel capacity: 120 l

Consumption
Consumption (example): 12–16 l/h (ROTAX 912 iS values indicated separately)

Notes
Performance data are given under ISA conditions and specific propeller installations (e.g. Mühlbauer MTV-33-1-A/175-200 and MTV-34-1-A/175-200 for 915 iS). TAS values referenced at specified altitude/conditions as indicated by manufacturer.

Characteristics / Technical specifications

• Model: Ellipse
• Manufacturer / Brand: Ellipse Aero (Czech Republic)
• Construction: Carbon composite primary structure with glass-fibre top layer and aramid reinforcement in cockpit
• Engine options: ROTAX 915 iS, ROTAX 912 iS, ROTAX 912 ULS
• Propeller options: MT-Propeller constant speed (two-blade) and E-PROPS carbon (three-bladed, 170 cm)
• MTOW: 600 kg
• Range: ~1 850 km (configuration dependent)
• Top cruise speed: reported up to 265 km/h TAS (engine/configuration dependent)
• Fuel capacity: 120 l (wing tanks)
• Baggage capacity: up to 15 kg
• Wing: elliptical planform with leading-edge slot; single-slot Fowler flaps
• Landing gear: electrically actuated retractable gear with shock absorbers
• Avionics: Kanardia Nesis III, Garmin G3X, Dynon SkyView HDX or custom combinations