17. Jun 2019 21:17 UTC |

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Swiss aircraft manufacturers go on a demo tour

LIGHTWING AC4CS-LSA

Following many positive comments by visitors of this year’s Aero show in Friedrichshafen, Swiss aircraft manufacturers Light Wing AG have decided to present their LSA/UL6 light aircraft, the AC4 to prospective buyers on a roadshow to various airfields in Germany. The tour is meant to give pilots the opportunity to experience the AC4 on the ground and in flight.



Swiss aircraft manufacturers Light Wing AG will be showing their LSA/UL6 light aircraft, the AC4 on a road show through Germany.

These are the individual stops of the demo tour as well as your personal ”boarding pass” for a flight in the AC4:





According to its manufacturers, the European Light Sport Aircraft Lightwing AC4 is the most economical two-seat aircraft for pilot training, built and certified in accordance with the new European rules on light sport aircraft, and the first and only certified aircraft of its class equipped with a modern and economic fuel injection engine.



The AC4 was thoroughly tested for several qualification- and certification requirements in accordance with the new EASA rules on light sport aircraft.

AC4 CS-LSA — Certification tests
A personal summary by experimental test pilot Res Schmid

The AC4 Aircraft was tested for several qualification/certification requirements such as trimmability longitudinal-, directional-, and lateral stability in both static and dynamic conditions, low and high speed stall, V-Dive, max. Nz load, spin-entry and -recovery.

The AC4 demonstrated overall excellent stability in all axes with well-shaped stick and rudder deflections versus rudder and stick forces. Trimmability is well shaped and allows quick and precise neutralizing of stick forces. The yaw tendency as a function of power setting and airspeed is easy to compensate with adequate rudder deflection.

The Rotax engine with fuel injection is easy to handle and demonstrated good performance for takeoff and climb and excellent economical cruise performance with a fuel consumption of less than 14 liters per hour.

The high wing aircraft with its well-proportioned ratio of wingspan to fuselage length is well damped in all axes and demonstrated good spin resistance. During spin tests, recovery was achieved by neutralizing stick and rudder deflection against the direction of the spin.

Throughout the whole envelope, no unexpected vibrations or buffeting were found. At V-dive (CAS 228 km/h) stability in all three axes and flutter resistance were excellent. To establish max continuous load of 4 g Nz required the steep spiral technique and was repeated several times. Due to the low gross weight the deceleration during increasing Nz loads is very high and provides pilots from unintended overstressing.



The demo tour is meant to give pilots the opportunity to experience the AC4 on the ground and in flight.

Lightwing AC4 — Technical data

• High strutted wing, two seats
• Anodized aluminium structure
• Polyester laminate for wings and flying control surfaces
• MTOW 600 kg (1323 lbs)
• Payload 216 kg (476 lbs)
• Manoeuvering load factors +4 g / -2 g
• 100 hp 4-stroke engine Rotax 912iS Sport with redundant electronic fuel injection
• Electric system with 1 generator und 1 alternator
• 3-blade propeller Neuform (Optional MTV-34 CS)
• Dynon Skyview navigation system
• Type Certificate CS-LSA EASA.A.588
• License PPL or LAPL



The Lightwing AG AC4 is equipped with a Dynon Skyview navigation system.



More info on www.lightwing.ch
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