The AB-115 is a
high-wing monoplane, with strut-braced rectangular
wings (
NACA 23012 profile). The wings are made of metal, the fuselage and empennage members are made of fabric-covered welded steel
tubes. It is a development of
Aero Boero's earlier AB-95. The trainer version, the most common variant, contains two seats in
tandem configuration, with the pilot-flying/student pilot in the front seat, and the
instructor/pilot-not-flying seating in the rear. Behind the rear seat there is a
cargo hold, with capacity of up to 25 kg (55 lb). The front seat has a three-point
seatbelt, while the rear one has a simple, abdominal belt. Both occupants enter and exit the aircraft through one single, large door in the right side of the
cockpit. The flight commands are duplicated, with the front seat's
center stick,
throttle lever,
rudder pedals and
brake pedals mechanically connected to the rear seat's. The rear stick and the throttle lever can be disassembled when carrying passenger(s). The primary flight commands are actuated by
cables and
pulleys. The
ailerons and flaps are made of aluminum alloy, while the rudder and
elevators are made of
steel tubes and fabric. The
flaps have four positions (neutral, 15°, 30° and 45°), and are actuated manually, by a lever in the upper left part of the cockpit. The pitch
trim tab is located in the
trailing edge of the left elevator, and is actuated by a
handle in the left side of the cockpit. The rudder and the left aileron also have ground-adjustable trim tabs. A
Lycoming O-235-C2A
air-cooled engine, rated at 115
hp (85.8 kW), drives a
Sensenich Propeller model 72 CK-050, metallic fixed-pitch twin-bladed
propeller. The fuel system uses a FACET MA 3PA
carburetor, equipped with
carburetor heat. Electrical power is supplied by a
Prestolite alternator. The ignition system is driven by dual
Bendix Scintilla S5LN
magnetos; the starter motor is also by Prestolite. The engine incorporates a wet crankcase, and the lubricant is cooled by an oil
radiator in the front of the engine's air intake, which is triggered by a bi-metallic
thermostatic valve. The maximum
fuel capacity is 115 liters, with 110 liters usable. The engine can use
gasoline of 80/87 to 100/130
octane. Each wing contains an aluminum fuel tank in the root. Fuel quantity is indicated by sight glasses in the wing roots. There are two separate fuel selectors, for each tank, which can be independently opened and closed. The aircraft uses a
conventional undercarriage. Each main gear is fixed to the fuselage at three points – two articulated joints, plus one
shock absorber. The
wheels are made of aluminum alloy and
magnesium, and are equipped with independent hydraulic-actuated brakes. There is no parking brake; when parked, it must be secured by
chocks. The
tailwheel is connected to the rudder by
bungee springs, and it can also rotate freely when "unlocked". The instrument panel is, since the AB-115 is mostly used for basic flight training. The
flight instruments are an
airspeed indicator,
altimeter,
VSI a
turn coordinator, and a
magnetic compass. The engine instruments are a
tachometer,
oil pressure and
oil temperature indicators, and an
ammeter. The panel includes one Bendix/King
VHF radio and one Bendix/King
transponder. The cabin instruments are flood-lit; the light operates when the running lights are on. The right wing has two
landing lights, which have a five-minute continuous operating limit. ==Variants==