Meet the Viper SD4

Discover the perfect flight experience


The Viper SD4 is an all-metal two-seater LSA airplane with an elegant design that is admired by both critics and aviation lovers. The outstanding flight characteristics, extra safety (airplane parachute BRS included), low fuel consumption, highest-quality equipment, and low maintenance cost make it the best choice for pilot training, sports, travelling, and recreational flying.

Why Choose the Viper SD4

  • An all-metal design of the plane – low overall costs of operation and comprehensive maintenance
  • A strong and robust metal construction increases the safety level and ensures a long lifetime of the plane
  • A spacious cockpit with and an excellent outlook ensures a comfortable and pleasant flight also on long routes
  • Top flight characteristics will be appreciated by not only experienced pilots, but also by training centres (flight schools), their flight instructors as well as beginner pilots
  • The latest avionic technologies – wide utility options, excellent quality properties and a first-class design
  • Excellent and precise manufacturing on CNC machines, using quality materials, quality workmanship with particular emphasis on accuracy, security and great customer value
  • A low fuel consumption, minimum operation costs
  • The finish and equipment of the plane according to the customer’s individual requirements and wishes


  • Manufacturer – Rotax
  • Model options – 912 ULS / 912 iS Sport / 914 (Turbocharged)
  • Horsepower – 100 (Rotax 912) / 115 (Rotax 114)
  • Wingspan – 27 ft 7 in (8.4 m)
  • Length – 21 ft (6.4 m)
  • Height – 7 ft 3 in (2.2 m)
  • Takeoff  – 790 ft (241 m)
  • Takeoff Over 50 ft Obstacle – 1250 ft (380 m)
  • Landing Groundroll – 525 ft (160 m)
  • Climb rate – 985 ft/min (5 m/sec)
  • Cruise speed – 108 kn (200 km/h)
  • Never exceed speed – 130 kn (240 km/h)
  • Stall speed in clean configuration – 49 KIAS
  • Stall speed in landing configuration (flaps position 2, 30


     – 43 KIAS
  • Fuel tank volume – 26 gal
  • Range – 600 NM
  • Average fuel consumption (depends on engine) 

– 4.5 gal/h (912 ULS) / 3.5 gal/h (912 iS Sport) / 4.6 gal/h (914)

  • Maximum takeoff weight – 1320 lb (600 kg)

Reviews and Testimonials

The Viper amazes me every time I fly. Its capabilities and stability in flight are over the limits for just an LSA. The Viper is very easy to fly and also very safe to fly. I highly recommend this airplane mostly cause of the low maintenance and operation costs, its stability and of course safety!
Don Lau
I flew the Viper CrossCountry and throughout that flight, I was able to experience the aircraft in multiple flying environments. I can truly say I’ll fly this aircraft around the world if I could. The canopy allowed astonishing visibility since you can see straight vertical. The avionics package was easy to use and provided all navigational and air data information that I needed. All my flights were at max takeoff weight and I could feel that the limitation was not because of lack of performance or power but simply by regulation. Overall this is a great CrossCountry, time building or just plain fun at a very insignificant fuel burn.
Felipe Santiago
Flying the Viper SD4 was amazing, flew it on a CrossCountry throughout several states and the big clear canopy allowed me to have a very wide view that I enjoyed on my two day trip from Florida to Wisconsin. Its great performance and versatile stick control helped me make small corrections on cruise and also made it very easy to land. The glass cockpit reliefs the workload, putting all you need on just one screen. Flying the Viper was a very fun and complete experience.
Juan Carlos Pineda
Commercial pilot/CFI