The B4-PC11 is designed to Standard Class specifications, meaning that it has a 15-metre wingspan and no flaps.

Air brakes are provided on the top surface of each wing for glidepath control.

In the spring of the same year the first production example (numbered HB-1100) made its first flight.

[1] Subsequently, in 1994, EWMS Technomanagement bought the rights to produce and service the B4-PC11.

The changes in construction from B4-PC11 through A and AF variants were to add extra ribs through the fuselage section (increasing torsional rigidity, only AF variant), and to modify the control column stops and shorten the rudder, giving greater control surface deflection.