Ripmax WOT4-E User manual

Introduction
Congratulations on your purchase of the WOT 4-E ARTF-the first electric almost ready to fly
version of this timeless classic. Described as the most exciting sports aerobatic model of all time,
it can be assembled in the minimum of time.
Before commencing construction, please ensure that you read these instrutions in their entirety.
Items recommended to Complete
The Wot 4-e ARTF is suitable for a wide variety of power systems. We have found the following
combination to be the perfect balance of power,low weight and economy.
Motor: KMS Quantum 2820/05 Part No.M-KMSQ2820/05
ESC: Arrowind 35A ESC(SW) Part No.P-AWDFC3505SW or Dragon X 45A Brushless ESC
Part No. P-RMXD045
Propeller: APC 11”*5.5” Thin Electric Part No.E-LP11055E
Li-Po: 3 cell 2100-2500mah 20C

Fitting the ailerons and Completing wing
STEP 1
The wings and ailerons are aupplied with the hinges loose fitted,ready for installation. Remove
both ailerons and ensure that the hinges are inserted mid-way in their slots. Using thin cyano, pour
a couple of drops onto each hinge-above and below-ensuring the glue soaks into the hinge and the
surrounding wood.
STEP 2
Carefully slide each aileron into position,ensuring a gap-free hinge line. Make sure that each
aileron lines up with the wing tips and tat they are free to move through their entire travel. Centre
each aileron between the root and tip so that there is a equal gap at both ends. Minimise any hinge
gap, then carefully add a couple of drops of thin cyano to the top and bottom of each hinge
ensuring that the glue does not run through the hinge line onto the bottom of the wing. Turn the
wing over and drop more cyano onto each hinge from the other side.

STEP 3
Locate the wing servo apertures through the covering on the underside of the wing.carefully trim
away the covering as shown.
STEP 4
Prepare your aileron servos by connecting a suitable 300mm extension lead to each. It is a good
idea to use a lead-lock, a turn of insulation tape or heatshrink tube over the joint for additional
security.carefully tie each aileron servo’s lead to the length of cotton already in the wing panels.

STEP 5
Cut away the covering over the servo lead holes in the underside of the wing panels and carefully
pull the leads through to the center of the wing using the cotton thread.lift out the servo connector
through the hole then retain the servo lead with a short length of tape to stop the lead pulling back
into the wing.
STEP 6
Check that your choice of servo fits the servo apertures in the underside of the wing. Adjust the
size of the mounting holes with a sharp knife if required. Pilot drill the mounting holes.
STEP 7
Screw the aileron servos in position using the mounting screws, rubber grommets and ferrules
supplied with your radio. Note that the output arms face towards the rear of the wing.

STEP 8
Locate the aileron control horns. They are screwed in position on the ailerons in line with the
aileron servo’s output arm. Align the row of holes in the horn with the hinge line. Mark and pilot
drill two mounting holes in each aileron.
STEP 9
Screw the aileron horns in position. The screws thread into the moulded horn plate on the top
surface of the wing. Do not overtighten the control horn mounting screws-you don;t wat to crush
the aileron.

STEP 10
Use a small length of tape to hold each of the ailerons at their neutral position while you complete
the aileron linkages. Ensure that both aileron servos are centered.
STEP 11
The aileron push-rods is adjustable ball links system.
STEP 12
Enlarge the servo arm holes to 2mm for install the M2 screws.

STEP 13
Install the ball links to the servo arms with M2 screws and locking nuts.
STEP 14
Install the ball links to the aileron horns with M2 screws and locking nuts.
STEP 15
You can adjust the pushrod by rotate the ball links.

STEP 16
Epoxy the incidence locating dowel in position in one wing panel.
STEP 17
Using a sharp knife, prepare the wings for joining by trimming off any excess film that has
overlapped the root during manufacture.

STEP 18
Locate the wing joining brace, measure and mark a center-line on the joining brace.
STEP 19
Coat one half of the brace and the inside of the corresponding slot in the wing panel with rapid
setting epoxy. Ensure that adequate epoxy is used to fully cover all surfaces.
STEP 20
Insert the brace half-way into one wing panel using the center-line as a guide.wipe off any excess
epoxy and allow glue to cure.

STEP 21
Now spread sufficient epoxy over the opposite panel joiner slot,wing joiner and root rib.we
suggest using 30 minute or 1 hour epoxy for this.
STEP 22
Protect the covering with masking tape,then bring the two panels together ensuring the epoxy fills
the join. Wipe off any excess that squeezes out of the joint,then use tape to hold the panels
together as the adhesive cures.
Fuselage,Motor&Radio
STEP 23
Locate the aluminium main undercarriage,wheels and wheel mounting hardware(mounting
screws,plain and nylon nuts). Pass the mounting screw through the wheel,screw on a plain
nut,then pass through the main undercarriage. Now fit a nylon nut on the inside. Hold the inner nut
still and tighten the nylon nut.check the wheel rotates freely.repeat for the second wheel.

STEP 24
Locate the position of the captive nuts already installed for the undercarriage in the underside of
the fuselage.carefully trim away the covering with a sharp knife. Install the main undercarriage
using the two mounting screws supplied.
STEP 25
Locate the pre-bent tailwheel assembly and fit the tailwheel using the collet supplied.

STEP 26
Prepare the fuselage for fitting the tailplane by carefully trimming the covering away from the
pre-cut tailplane slot. Also cut away the covering over the exit slots for the rudder and elevator
pushrods/closed loops.
STEP 27
Prepare the fuselage for fitting the fin by carefully trimming the covering away from the pre-cut
fin slot.
STEP 28
Holding the tailwheel assembly in position with the tail wheel wire inline with the rear of the
fuselage,pilot drill the fuselage.

STEP 29
Screw the tailwheel assembly in position with the three self-tapping screws supplied.
STEP 30
Install your elevator and rudder servos in the pre-fitted servo tray. Note the orientation of the servo
out puts.pilot drill the tray for your servo mounting.

STEP 31
Fit the brass ferrules and rubber grommets supplied with your servos,then screw them in position
as shown.
STEP 32
Measure and mark a center-line on the top of the tailplane.
STEP 33
Slide the tailplane into its pre-cut slot in the rear of the fuselage.ensure that it is square to the
fuselage and centered in its slot using a long ruler or string as shown in the diagram on the right.
Mark the tailplane on the top and bottom where it enters the fuselage using a soft,water-soluble
pen.

STEP 34
Remove the tailplane and cut away the covering from just inside the marked lines to give a
film-free surface for the glue to bond.IMPORTANT:Ensure that only the film is cut-not the
tailplane-as this will seriously weaken the structure.
STEP 35
Using sufficient epoxy applied to the exposed wood,glue the tailplane into its slot.
STEP 36
Check that the tailplane is correctly aligned and square to the fuselage. Use masking tape to
protect the covering(removing it as soon as you are satisfied with the alignment and before the
epoxy cures). Excess epoxy should be wiped from the model before it cures using methylated
spirit or methanol.

STEP 37
Once the epoxy has cured,slide the fin into its pre-cut slot in the top of the fuselage. Ensure that it
is pushed down far enough to touch the top of the tailplane. Mark the fin on both sides where it
enters the fuselage using a soft, water-soluble pen.
STEP 38
Remove the fin and cut away the covering from just below the marked line to give a film-free
surface for the glue to bond. IMPORTANT NOTE: Ensure that only the film is cut-not the fin-as
this will seriously weaken the structure.

STEP 39
Remove the film immediately in front of the fin slot so that the front of the fin has bare wood to
bond to.
STEP 40
Using epoxy,glue the fin in its slot. Use masking tape to protect the covering whilst you do
this(removing it as soon as you are satisfied with the alignment and before the epoxy cures).
Check that the fin is pushed down fully into its slot in the top of the fuselage and ensure that it is
perpendicular to the tailplane using a set square.
STEP 41
Remove the elevator slot film with searing iron. Insert two hinges in each elevator half,ensuring
they are located mid-way in their slots. Using thin cyano, pour a couple of drops onto each
hinge-above and below-ensuring the glue soaks into the hinge and the surrounding wood.

STEP 42
Now slide the first elevator into position ensuring their hinges enter their pre-cut slots in the
tailplane. Ensuring a gap-free hinge line and a 1mm gap between the elevator and tip,add a couple
of drops of thin cyano to the top and bottom of each hinge. Make sure that the glue does not run
through the hinge line onto the bottom of the tail. Add a drop of CA glue to stick the U wire to the
elevator hole.
STEP 43
Repeat the procedure for the second elevator half,ensuring a gap-free hinge line.

STEP 44
Remove the rudder slot film with searing iron. Insert two hinges into the rudder,ensuring they are
located mid-way in their slots. Using thin cyano,pour a couple of drops onto each hinge-above and
below-ensuring the glue soaks into the hinge and surrounding wood. Install the rudder to the fin to
check the tail wheel wire bend position.
STEP 45
Bend the tail wheel wire with vice and stick the wire to the rudder hole.
STEP 46
Now slide the rudder in place making sure that both hinges are located in their slots in the fin and
that the tailwheel wire fits neatly into tis recess in the rudder. Wipe off any excess epoxy. Ensure
that the rudder is aligned to the top of the fin and there is free movement left and right plus a
gap-free hinge line. Now apply a couple of drops of thin cyano to each side of each hinge taking
care not to allow the adhesive to run through the gap onto the other side of the model. Then install
the tapping screws to the tail-board again.

STEP 47
Install the two nylon horns to the rudder with 2 screws.
STEP 48
Ensuring they are aligned to the hinge line, position the elevator horns on the underside of the
elevator. Mark and pilot drill two mounting holes in elevator half.Now screw the control horns to
each elevator half. The screws thread into the moulded horn plate on the top surface of the
elevators. Do not overtighten the control horn mounting screws-you don’t want to crush the
elevators. Trim away excess threads.