Storm 400 Special

With over 10 years in aircraft industry S.G.Aviation has become one of the most successful kit and ready to fly manufacturers in the world in its category. S.G. Aviation manufactures the world’s finest Made in Italy style aircrafts with a proven builder assistance program, flight training and dedicated technical support, S.G.Aviation assures builders’ success in building and safety flying these aircrafts in a short time.

The Storm 400 offers superior performance and capabilities for a 2+2 place, comfortable side-by-side seating, improved cabin space, and best of all, the Storm 400 is available on kit and ready to fly as other Storm models. The Storm 400 is easy to build, easy to fly, true high performance airplane with the ability to make long cross country trips. No other aircraft offers the quality, performance, comfort and superior design of the standard Storm 400. Longer 4 inches more than Storm 280 and 300 series, the Storm 400 has large space area improved both inside and outside.

The all sheet metal fuselage is a conventional semi-monocoque structure: a basic rectangular section formed by four longerons, with skins blind riveted to the longerons (and stiffeners). Fuselage structure is a all-metal framework for cabin area high protection and semimonococque light alloy tail to support empennage. Easy to inspect, the Storm 400 has immediate access’ for servicing to be efficient and inexpensive at the same time.

The Storm 400 is a 2+2 place with improved cabin space than 280 and 300 series. The cabin width is an amazing 43 inches from window to window. The wide cabin (1,10 m) features two side by side seats adjustable via sliding rail stops, and a large space behind forward seats that can be occupied by 2 passengers or by baggage.

The wide windshield offers a complete view unhindered by structural elements, while large side windows allow for excellent visibility.

The entirely moving tailplane permits superior control and a high degree of stick free stability, moving surfaces feature mass balancing.

The wing is of all-metal stressed-skin full-cantilever low-wing design consisting of two wing panels bolted to a spar box assembly in the fuselage. The wing has a high lift airfoil and wing tips to maximize effective wing span. The electrically activated flaps, allow stall speeds under 38Kts. With flaps deployed, a steep approach is possible resulting in a very short landing distance.
The Storm 400 utilizes the same gear system of other Storm models, developed specifically for flight training operations. The main gear is a 2 aluminium springs that provide double cantilever deflection. Four large bolts for each side hold up the 2 springs to a fuselage beam inside.

It provides excellent grass-field capability, and is very durable, simple and virtually maintenance-free. The nosewheel strut in the three-gear version uses a single heavy-duty bungee for shock absorbency. The nosewheel is steering, with direct linkage to the rudder pedals for very effective and responsive ground handling and tight turns. The main wheels are equipped with hydraulic disk brakes.

Specially studied wheel fairings are mounted on each wheel to reduce parasite drag. Engine cowling is made up two parts and allows for quick and complete opening. Fuel tanks are integral part of the wing structure and feature 65 litre capacity per each half wing. Instrument panel meets General Aviation standards both in size and quality allowing for installation of a wide variety of flight instrumentation, engine controls and com/nav apparatus.
Flight controls are traditional type with dual stick, dual rudder pedals and dual throttle knobs on dashboard. Longitudinal trim and electrical flap controls with position indicators are also located on dashboard.
Cabin ventilation is adjustable air vents fed via buried scoops.

wing span
wing area
empty weight
useful load
gross weight
fuel capacity
Lycoming O320 160HP
22,4 ft.
26,2 ft.
112,5 sq.ft.
2 + 2
1055 lbs

1870 lbs
37 gal.
680 s.m.


takeoff distance, ground roll
rate of climb
max speed
cruise speed
landing distance, ground roll
service ceiling
720 ft.
180 mph
170 mph
655 ft.

limiting and recommended speeds

design manoeuvring speed (Va)
never exceed speed (Vne)
stall, power off (Vsl)
landing approach speed
192 mph
44 mph

All specifications are based on manufacturer's calculations