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INFORMATIONS TECHNIQUES
ZIGOLO MG21
INTRODUCTION
Le TrueLite est un 3-axes avec une aile haute avec une quille et une dérive en métal. C’est un
appareil à hélice propulsive. Le train principal est composé de 2 roues amortis installés à l’avant du
centre de gravité, Cela facilite son utilisation sur des terrains d'atterrissage peu préparés.
Le Truelight est recouvert de feuilles de métal 6061T6 . Les pièces sont boulonnés et rivetés. La
structure de la cellule supporte les ailes et la dérive, les ailes peuvent être pliés en 2 min par une
seule personne.
Les commandes de vol sont actionnés par cable ou avec des axes.
L’entoilage des ailes est fait en Dacron, avec une finition peinture.
Truelite short wing 3
Truelite long wing 1
Truelite short wing 9
Truelite short wing 3
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Performance – Long Wing with Flaps (FAR 103 Compliant)
Stall speed with flaps: 44 km/h (24 kt)
Maneuvering speed (Va): 100 km/h (54 kt)
Low cruise speed: 70 km/h (37 kt)
Cruise speed: 105 km/h (55 kt)
Vne: 173 km/h (94 kt)
Fuel consumption at low cruise: approximately 5 L/h
Performance – Short Wing with Gurney Flap
Stall speed: 60 km/h (32 kt)
Maximum speed (Vh): 125 km/h (67 kt)
Cruise speed clean: 105 km/h (55 kt)
Vne with gurney flap: 140 km/h (76 kt)
Vne clean airfoil: 173 km/h (94 kt)
CG margin: 25% to 35% from leading edge
Standard cruise consumption: approximately 6L/h
Folded Dimensions
Folding time is less than two minutes, with no control disconnection or critical systems separation required. A single person can load and unload the aircraft from a trailer, and fold or unfold the wings independently.
Length: 6.3 m
Width: 1.9 m
Height: 1.6 m
Load Limits and Structural Testing
Design load: +4G / –2G at 220 kg MTOW
Safety factor: 1.5
Empty weight without parachute: 115 kg
Wing tested at 4G – no permanent deformation
Tail tested at 6G – no permanent deformation
Wing bending test at 6G – passed
Full aircraft load test at 4G Without deformation
Calculations include fatigue, elastic limits, asymmetric loads, and parachute anchor loads.
The aircraft remains in the elastic range below 4G.
A standardized maneuvering speed of 100 km/h provides a wide safety margin.
Wing Construction
Material: 6061T6 aluminum
Spar with aluminum cup and formed ribs
Leading edge: aluminum skin
Ailerons: aluminum with Dacron fabric
Wingspan: 8.3 m
Chord: 1.0 m
Wing area: 8.3 m²
Aspect ratio: 8.5
Taper ratio: 1.0
Dihedral: 1.5°
Tail Surfaces
Aluminum tube and sheet‑metal ribs
Pre‑sewn heat‑shrink fabric bags
Removable for transport
Rudder operated by stainless‑steel cables
Elevator operated by Teleflex cable
Adjustable horizontal stabilizer
Landing Gear
Main gear: 7075 aluminum conical bars
Tailwheel: 7075 aluminum, linked to rudder
Track: 1.2 m
Wheelbase: 3.1 m
Tailwheel diameter: 120 mm
Aviad wheels: disk brake 4–6 inch tires, 340 × 110 mm, 5.3 kg (pair)
Fuselage Dimensions
Length: 4.3 m
Width: 0.5 m
Height: 1.6 m
Engine and Fuel
Standard engine: Vittorazi Cosmos 300
mechanical reduction drive with centrifugal clutch reduction1:3.04
3blade fixed prop 150cm
Fuel: 95 octane gasoline mixed with synthetic oil
Motul 710: 2 percent (1:50)
Motul 800: 1.5 percent (1:66)
Fuel Tanks
Main tank: 18 L, fuselage‑mounted
Optional wing tanks: 4 × 5.8 L (total 23 L)
Emergency System
Parachute: Cylindrcone, automatic deployment
Safety harness: 4‑point
Fabric and Paint
Control surfaces use Dacron or Oratex fabric.
Fabric can be painted manually or sprayed.
Oratex is available pre‑painted and tensioned with heat.
Tail and aileron fabric is supplied pre‑cut for easy installation.
Durability exceeds 15 years, with simple repairs using adhesive. Wings are fully aluminum.
Regulatory Compliance
FAR 103
SSDR
DGAC France
FAR 103 SSDR DGAC France Spanish Regulation BOE 13/11/2025: recognition of ultralight aircraft up to 120 kg empty weight as exempt from registration
The TrueLite includes improvements over the Zigolo Mg21: increased wingspan, integrated flaps, and improved pilot comfort. It meets FAR 103 requirements and is eligible for DGAC registration. In other regions, evaluation may be required.
Kit Documentation
Full kit documentation, assembly manuals, and DGAC registration materials are being finalized. The previous model’s documentation may be used for general construction reference. The TrueLite incorporates more than ten years of development and refinement.
Performances et spécifications
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