CHAPTER III

Technical Specifications

In this blog, I am sharing the complete PDF of Chapter III – Technical Specifications for structured study and reference.

🎥 Watch the detailed explanation on YouTube:
https://youtu.be/zP6D7kVj8ag

Now, let’s understand the aircraft technically and professionally.

Airframe

The airframe defines the structure, balance, and load capability of the aircraft.

🔹 Dimensions

Wingspan: 10.5 metres
Length: 6.5 metres
Height: 2.05 metres
Wing Surface Area: 9.29 sq metres
Vertical Fin Area: 1.10 sq metres
Horizontal Stabilizer Area: 1.08 sq metres
Aspect Ratio: 11.8

🔹 Flap Positions

Position 1 – 15°
Position 2 – 25°

🔹 Centre of Gravity (CG)

20% – 38% of MAC
220 mm – 368 mm aft of datum

Maintaining CG within limits is critical for stability and control.

🔹 Weight Limitations

Max Takeoff Weight (MTOW): 472.5 kg
Max Landing Weight (MLW): 472.5 kg
Standard Empty Weight: 275 kg
Max Useful Load: 197.5 kg
Max Baggage Weight: 20 kg
Max Load per Seat: 110 kg
Minimum Combined Crew Weight: 55 kg

🔹 Fuel & Oil Capacity

Total Fuel Capacity: 50 Litres
Usable Fuel: 48 Litres
Oil Capacity: 3 Litres

🔹 Load Factors

Maximum Positive G: +4 G
Maximum Negative G: -2 G
Tested Minimum Safety Factor: 1.875

Engine / Powerplant

The aircraft is powered by:

🔹 Engine Type

Rotax 912 A (80 HP)

4 Stroke
4 Cylinder
Horizontally Opposed
Spark Ignition

🔹 Propeller

FP 02–80 Fixed Pitch
Diameter: 1650 mm

🔹 Performance & Limits

Absolute Ceiling (MTOW): 6200 metres / 20,300 feet
Max Permitted RPM: 5800 (5 minutes max)
Engine RPM Max (Ground): 5500
Torque: 103 Nm at 4800 RPM
Compression Ratio: 9:1

🔹 Temperature Limits

Max Coolant Temperature: 120°C
EGT Normal: 650°C – 885°C
Max EGT: 900°C
Oil Temp Normal: 90°C – 110°C
Oil Temp Max: 140°C

🔹 Oil Pressure

Minimum: 1.0 Bar
Maximum: 6.0 Bar

🔹 Fuel Recommendation

Unleaded Super Grade 93 or above (Maximum 10% alcohol)

Performance

🔹 Takeoff Performance

Ground Roll (MTOW): 140 metres
Over 50 ft Obstacle: 225 metres

🔹 Climb Performance

Best Climb Speed: 76 knots
Best Climb Rate (MTOW, Sea Level): 1220 ft/min
Climb at 100 knots: 800 ft/min

🔹 Cruise Performance

Cruise Speed: 112 knots

🔹 Descent Performance

Sink Rate at 50 knots (Full flaps, Idle): 440 ft/min

🔹 Glide Performance

Minimum Sink Speed: 58 knots
Best L/D Speed: 64 knots
Best L/D Ratio: 17:1

🔹 Landing Performance

Final Approach Speed: 50 knots (Flaps 25°)
Landing Roll (MTOW, Sea Level): 410 feet

Airspeeds

🔹 Stall Speeds

Vs (Clean): 43 knots
Vso (Flaps 25°): 35 knots

🔹 Flap Speeds

VFE 15°: 70 knots
VFE 25°: 55 knots

🔹 Other Critical Speeds

VA (Maneuvering Speed): 86 knots
VNO (Normal Operating): 108 knots
VNE (Never Exceed Speed): 135 knots

Instrument Markings

🔹 ASI Markings

White Band: 35–70 knots (Flap Operating Range)
Green Band: 43–108 knots (Normal Operating Range)
Yellow Band: 108–135 knots (Caution – Smooth Air Only)
Red Line: 135 knots (VNE)

🔹 Engine Instruments

Tachometer

Min RPM: 1600
Normal: 1600–5500
Caution: 5500–5800
Max RPM: 5800

Oil Temperature

Min: 50°C
Normal: 90°C–110°C
Caution: 110°C–140°C
Max: 140°C

Coolant Temperature

Caution: 110°C–120°C
Max: 120°C

Oil Pressure

Min: 1 Bar
Max: 6 Bar

🔹 Electrical System

Battery: 12V Lithium Phosphate, 7.5 Ah
Alternator: 12V, 250W at 5500 RPM
Powers ignition, instruments, GPS, radio, lights, and avionics

📥 Download the full Chapter III PDF here: Chapter 3

Final Note

Technical specifications are not just numbers — they define the safe operating envelope of the aircraft.

A disciplined pilot does not just memorize these values.
He understands what they mean in real flight conditions.

📥 Download the complete Chapter III PDF from the link above for structured revision.
🎥 Watch the full YouTube explanation for detailed breakdown and clarity.

Study technically. Fly professionally. Stay within limits. ✈️

Menu

NCC Virus SW 80 Chapter III – Aircraft Technical Data, Limits & Performance (PDF + YouTube Guide)