Banjo-MH - Design DescriptionWing is based on the SM701 airfoil, trapezoidal outer part is modified into FX-60-126. Wingtips are equipped with winglets and integrated support wheels. Basic element of the construction is a plywood, box section beam and ribs made from spruce scantlings. Front part of the ribs is made from expanded polystyrene. Leading edge of the wing is covered by plywood and forms a torsion box. Polyester fabric covers trailing part of the wing. On the upper part of the wing are located hinged aerodynamic brakes. Wooden construction ailerons are also covered by a polyester fabric. They are operated via Dural tube rods. Wings are supported by shaped struts. Wing is fixed to the fuselage by mountings located on the wing beam and on the trailing edge section.
Fuselage, including the tail fin, is formed from a fiberglass monocoque. Monocoque is reinforced by plywood ribs. Ribs are utilized as structure elements for wings, struts, undercarriage wheel, rescue system and power unit mountings.
Cockpit (closed type) is covered by a one-piece canopy made from a splinter-proof polycarbonate (Makrolon). There is a ventilation window on the side of the canopy. Control stick is a classic style type. The cockpit is equipped with aerodynamic brakes lever (left side), engine throttle (left side), power unit position selector, ignition switch, starter, propeller stop control and main power switch (on the right side of the cockpit). The cockpit is ventilated via ventilation outlets, located on the instrument panel. Adjustable pilot’s seat is equipped with 4-point safety belts.
Fixed undercarriage consists of the main unsprung wheel (outer radius 400mm) and uncontrollable tail wheel (outer radius 140mm). The main wheel is fitted with a disk brake. The brake is operated via a cycle brake lever, mounted on the control stick.
Tail surfaces are "T" shaped. Horizontal tail surfaces have similar construction as the wing and use modified Wortmann FX-71-L-150/30 airfoil.
Controls and instrumentation. The instrument panel of the plane is equipped with the following instruments: airspeed indicator, variometer, altimeter, RPM gauge, fuel gauge, engine temperature gauge, compass and bank indicator. Power unit management panel is located on the right side of the cockpit. Instrumentation can be customized according to customer's requirements.
System of controls. Ailerons and elevator are operated via rods, equipped with swiveling joint ends. Levers are fitted with ball bearings. Rudder is cable controlled. Aerodynamic brakes are also cable controlled, in combination with springs.
Electrical system. The main source of the energy is an on-board accumulator 12V-14Ah, which is recharged by the engine. The accu feeds the lifting/retracting system of the power unit together with the electric starter.
Fuel system. Alu fuel tank is located in the fuselage and it can contain 14 liters of the fuel. It is equipped with fuel float system, measuring quantity of the fuel in the tank. Filler neck is located on the left side of the fuselage, below the wing.
Power unit is based on the engine HIRTH F33 B, equipped with an electric starter, belt reducer and two-blade propeller. Power unit can be lifted or retracted into the enclosed power unit bay during the flight.