iKarus C42 Owner's Manual

C42 Owner’s Manual (Microlight) Page 29
Roll
The stick is also connected to a torque tube mounted on top of the fuselage tube between the
seats, and turning on a Rose joint at each end. The rear of the torque tube carries a pair of horns
from which run control cables, one for each side. These cables are led behind and over the
cockpit, via pulleys, to a central bellcrank. From here, motion is transferred via push tubes to a
bellcrank in each wing, mounted on a wing compression strut forward of the aileron. A second
tube links this bellcrank to the aileron horn.
The geometry of the aileron control system produces some asymmetry in the deflections of the
ailerons, effectively eliminating adverse yaw.
Movement of the stick to the right results in a lifting of the right hand aileron and depression of
the left, and vice versa.
Yaw
Dual rudder pedals are mounted on common torque tubes, bearing in bushes installed directly
into the fuselage tube. Control cables run from points near the top of the pedals’ arms direct to
the rudder horns.
Push rods connected to arms on the font fork, permit direct steering to be made via the rudder
pedals. These push rods are curved to permit slight bending in the event of large opposing
forces from two pilots being applied to the rudder pedals. In this event, a large proportion of the
load is borne by the rudder cables themselves.
Two light springs are fitted to the rudder pedals to aid centering.
Pushing the right rudder pedal forward results in the rudder moving to the right; pushing the left
pedal forward results in the rudder moving to the left.
Trim
An electric pitch trim system is controlled from a rocker switch in the dash. Pressing the top of
the rocker switch lifts the trailing edge of the trim tab and results in a pitch down trim; pressing
the bottom depresses the trim tab and results in a pitch up trim. The switch controls a small servo
motor near the trailing edge of the fixed stabilizer. A short push rod runs from this servo motor to
the trim tab horn. Raising the trim tab in flight results in a down deflection of the trailing edge of
the elevator and a nose down pitch. A panel-mounted meter indicates trim position.
If the trim runs away to one extreme or fails in one position, no undue stick force is required to
maintain control.

iKarus C42 Specifications

General

Manufacturer	Comco Ikarus
Type	Ultralight Aircraft
Engine	Rotax 912
Cruise Speed	160 km/h
Stall Speed	65 km/h
Seats	2
Height	2.3 m
Maximum Takeoff Weight	472.5 kg
Range	800 km
Service Ceiling	4000 m
Power Output	80 hp
Rate of Climb	5 m/s