Arrow Coax Livella Uno

The Arrow Coax Livella Uno (transl. First Level) is a German helicopter under development by Arrow Coax Ultra Light Helicopter of Hornhausen and introduced at the AERO Friedrichshafen airshow in 2015. The aircraft is intended to be supplied as a kit for amateur construction.[1]

Livella Uno
Role Helicopter
National origin Germany
Manufacturer Arrow Coax Ultra Light Helicopter
Introduction 2015
Status Under development (2015)
Number built at least one

Design and development


The Livella Uno was designed to comply with the US FAR 103 Ultralight Vehicles and the European 120 kg class ultralight aircraft rules. It features a dual coaxial main rotors, with an inverted V-tail, a single open-air pilot's seat without a windshield, tricycle landing gear and a 40 hp (30 kW) Wankel Aixro XH40 engine.[1]

The aircraft fuselage is made from tubing. Its two-bladed rotors have a diameter of 3.8 m (12.5 ft). The aircraft has a typical empty weight of 85 kg (187 lb) and a gross weight of 195 kg (430 lb), giving a useful load of 110 kg (243 lb).[1]

The aircraft mounts a Galaxy Rescue System ballistic parachute in the rotor mast. It also has a small electric motor to power the rotor system from a battery in the event of an engine failure, allowing five minutes of power to land, since the low inertia rotor blades may not support autorotation.[2]

Specifications (Livella Uno)


Data from Tacke[1]

General characteristics

  • Crew: one
  • Empty weight: 85 kg (187 lb)
  • Gross weight: 195 kg (430 lb)
  • Powerplant: 1 × Aixro XH40 liquid-cooled, Wankel aircraft engine, 30 kW (40 hp)
  • Main rotor diameter: 2 × 3.8 m (12 ft 6 in)
  • Main rotor area: 23 m2 (250 sq ft)


  • Maximum speed: 110 km/h (68 mph, 59 kn)
  • Cruise speed: 90 km/h (56 mph, 49 kn)
  • Disk loading: 8.5 kg/m2 (1.7 lb/sq ft)

See also



  1. ^ a b c d Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 204. Flying Pages Europe SARL, 2015. ISSN 1368-485X
  2. ^ "Arrow Coax UL Helicopter". 20 April 2015. Retrieved 30 November 2017.