8
Irvine Tutor
40
II
9
Irvine Tutor
40
II
To complete the linkage, disconnect
the clevis from the rudder horn.
Slide a short piece of fuel tubing over the clevis. Re-connect
the clevis (centre hole in the horn) and ensure that the rudder
is level with the rudder servo at its neutral position then snap
the clevis closed. Slide the tubing back over the clevis for
additional security.
Prepare your rudder servo’s horn for the steerable noseleg by fitting a pushrod connector as
shown. Do not over-tighten the nut as the connector needs to pivot in the horn. Apply a small
drop of cyano on the nut to secure. With the servo and noseleg centred, slide the connector over the noseleg pushrod and
attach to the rudder servo. Holding the noseleg centred, tighten the grub screw in the connector to retain the pushrod.
Stage 27
27.1. Fit a pushrod connector
to your servo horn
27.2. Slide over the pushrod then
re-fit the horn
27.3. Tighten with an Allen key
Prepare the
rudder pushrod
by screwing a nylon clevis onto one end until
the thread just appears through to the inside
of the clevis. Use a pair of pliers to hold the
pushrod wire while you do this. Locate the
slot in the top of the rear of the fuselage
for the rudder pushrod and carefully trim
away the covering as shown. Now insert
the pushrod into its pre-fitted guide tube.
Temporarily attach the clevis to the rudder
but do not snap it shut yet.
Stage 28
28.1. Trim away covering
28.2. Insert pushrod and connect to the rudder
With the rudder held level and the rudder servo centralised, mark where the pushrod crosses
the servo’s control horn on the other side to the noseleg pushrod. Using a pair of pliers, bend
the pushrod down through 90° at this point and cut off any excess pushrod wire leaving a 6mm length after the bend.
Locate the pushrod in a hole in the servo horn approximately 11mm out from the centre. Slip a nylon swing-in keeper over
the pushrod and clip it to the pushrod to retain.
Stage 29
29.1. Mark the pushrod where it crosses
the servo horn
29.3. Retain with a swing-in keeper
29.2. Bend the pushrod at this point and
trim off the excess
Stage 30
30.1. The completed rudder linkage
You must now decide whether you wish
to fit an I.C. (internal combustion) engine
or brushless electric motor.
The Irvine Tutor 40 II is suitable for both Electric
Motors and I.C. Engines. The following sections cover
I.C. Engine installation and Electric Power.
27.4. Glue a block in place to
support the tube
