Banjo mh

T he wing is of SM701profile (the rectangular part) and FX60-126 (end of
trapezoid parts). The ends of the wings are provided with winglets with
little supporting wheels.

The foundation of the construction is a box spar made of plywood and ribs made of
spruce balks 7x7 mm. They are made of two balks 3.5x8, glued together by EPOXY 371.
The front part of the ribs is made of polystyrene foam 30mm thick.
The leading part is coated with plywood and works as a torsion box.
The back part of the wing is covered with polyester fabrics. On the upper part of the
wing there are placed dumping air brakes.
The ailerons made of spruce, epoxy composite and plywood are covered with
polyester fabrics. They are controlled by rods made of duralumin pipes, their deflection
is +11o and -22o. The wing is fixed to the fuselage by profiled inclined struts.
The wing is connected to the centre section at the box spar and at the trailing edge.
 
 

Dimension BANJO mh
Span 13,3 m
Lenght 6,3 m
Overall heigh (prop in) 1,3 m
Wing area 10,5 m²
Profile SM701/FX-60-126
Wing aspect ratio 16.63
Tail wing area 1.016 m²
Empty weight 165 kg
Max take off weight 260 kg
Max. L/D 28 at 80 km/h

Engine:

 Type: HIRTH F33B
  Engine capacity: 313 cm³
  Performance: 18kW/6200 rpm
  Starter: 500 W
  Accumulator: 12 V/14 Ah
  Fuel tank capacity: 14 l
Fuel: unleaded gas with Castrol TTS oil (ratio: 50 : 1, or 2%) 
   
The fuselage including the fin rudder is made of laminate shell. The shell is provided with plywood ribs, which also work as suspenders of wings, wing struts, propulsion unit and landing gear wheels. The sides of the cockpit are reinforced with plywood. Together with the shell, the sides form the torsion box. The propulsion unit space is covered with a three-piece cover
The cockpit is closed, with one-piece cover made of polycarboxylic material, which is shatterproof. There is a window in the cover. The steerage is designed in a standard way. On the control stick there is a stick of the longitude balance control. In the cockpit there is a control of the air brakes, control of the engine speed (on the left side of the cockpit), control of retracting of the propulsion unit, ignition switch, starter switch, the control of the propeller stop and the master switch (on the right). The cockpit is provided with ventilation (its control is on the instrument panel
The Landing gear has one wheel (diameter 400mm) in front and an uncontrollable wheel (6x1,25 inch) in the back The front wheel is provided with a disc brake, which is controlled by the cycle handle placed on the control stick. The ends of the wings are provided with little supporting wheels of diameter of 100 mm
The tail wings are of "T" type. The profile of the horizontal tail wing is a modified profile Wortman FX-71-L-150/30, of the construction similar to the wing Its ground plan is a double trapezoid Deflection of the rudder is +25 0 and -300
The instruments. The plane has one instrument panel with electronic altimeter + variometer, bank indicator, air speed indicator, compass, RPM meter, engine thermometer, and fuel level indicator
The steering system. The steering of the ailerons, the horizontal tail wings is provided by rods with ball joints. Levers are placed on ball bearings. The steering of the rudder is provided by cables. The steering of the air brakes is also provided by cables with springs.
The propulsion unit.Engine HIRTH F33 B is used along with starter and V-belt reduction to drive the Woodcomp propeller. The accumulator is charged by the engine. The propulsion unit can be swung in the fuselage and again swung out of the fuselage during the flight. For this purpose an electric engine is used. It is controlled with a switch in the cockpit, its utmost positions are limited with limit switches. The electric engine is powered by the same accumulator as the starter. The starter switch works only when the propulsion unit is completely swung out of the fuselage.

Landing gear: standard landing gear with fixed tail wheel and mechanical disc brakes on front wheel.