AJ Aircraft Acuity Manuel utilisateur
62” AJ Acuity
Assembly Instructions
aj-aircraft.com
Page 1
Congratulations
The all-new AJ Aircraft Acuity was designed to give you all of the precision flight abilities of expensive
composite aircraft, in a more traditional balsa & plywood frame. Designed by our own F3A pattern champion
Andrew Jesky, this 62" model will be a perfect introduction to competition pattern aerobatics. With a tall &
slender fuselage, slim swept wing and T-Canaliser on the canopy, the Acuity will slip perfectly through any
aerobatic maneuver. And the suggested electronics setup will work perfectly with the 5&6s 4000-5000mAh
packs you likely already own.
Up Your Game! Fly AJ Aircraft
AJ Aircraft thanks you for the purchase of this airplane. Top grade materials and precision assembly have been
used to make this a top quality aircraft. Following the directions closely, will assure you many hours of
thrilling flight. Two years of design, development and testing has gone into this airframe. We hope you’re as
happy with it as we are!
WARNING
!
AJ Aircraft’s extensive testing ensures a high quality kit that has gone through many stages to provide you with
a safe, reliable, airframe. Poor assembly will lead to an unsafe model and therefore the instructions must be
followed closely. Should you have any questions, please do not hesitate to contact us. The safe operation of
this model is your responsibility and yours alone. If you are a beginner or have never flown a model of this
size and power you should attempt it with the help of an experienced pilot. This product should not be
considered a toy, but rather a sophisticated, working model that functions much like a full-scale airplane.
Because of its performance capabilities, this product, if not assembled and operated correctly, could cause
injury to you or spectators and damage to property.
This aircraft should be flown in accordance to the AMA safety code. It is highly recommended that
you join the Academy of Model Aeronautics in order to be properly insured and to operate your model at
AMA sanctioned flying fields. If you are not willing to accept all liability for the use of this product please
return if to the place of purchase immediately.
AJ Aircraft does not accept responsibility or liability for damages resulting from use of this product.
Before starting, read through the entire set of instructions to familiarize yourself with the
process.
Additional assembly information can be found in assembly videos on the
AJ-Aircraft YouTube Channel
If there’s ever a question, contact AJ Aircraft. 734-244-4015
aj-aircraft.com
Page 2
Contents
Congratulations....................................................................................................................................................................... 1
Contents..................................................................................................................................................................................2
Features .................................................................................................................................................................................. 2
Optional Configurations..........................................................................................................................................................3
Recommended Items for Completion..................................................................................................................................... 3
Tools Needed ..........................................................................................................................................................................3
Covering .................................................................................................................................................................................. 4
Wings ...................................................................................................................................................................................... 4
Landing Gear ...........................................................................................................................................................................9
Fuselage ................................................................................................................................................................................11
Elevator .................................................................................................................................................................................13
Rudder...................................................................................................................................................................................16
Push-Pull Rudder Control.................................................................................................................................................. 16
Pull-Pull Rudder Control....................................................................................................................................................16
Electric Motor .......................................................................................................................................................................20
Cowl & Canopy......................................................................................................................................................................21
Radio Installation & Setup ....................................................................................................................................................23
Features
Specs:
Wing Span - 62"
Length - 60"
AUW (dry) - 5-6 lb
Electric Power - 1200+ Watt Motor
90amp ESC
5-6s 4-5000mah LiPo
Radio - 5 Channel
3 Mini High Torque Servos
1 Standard Size High Torque Servo
What's in the box:
62” Acuity Airframe
Fiberglass Cowl & Wheel Pants
Carbon reinforced landing gear mount
Pre-hinged and sealed control surfaces
Removable rudder
Carbon main gear
G-10 control horns
Dual ball links for all connections
Carbon wing tube
Foil Wing bags
Light weight foam wheels
Complete hardware package
Genuine Ultracote Covering
aj-aircraft.com
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Optional Configurations
You have the option of using a pull-pull rudder servo or a push-pull rudder servo setup. Fasteners, control horns and
servo connecting rods are provided for optional rudder setups.
Recommended Items for Completion
Hacker A50-12s
Falcon 16x10 prop
Castle 90 ESC
Thunder Power 5s 5000mah LiPo
Futaba BLS1053/BLS551 Servos on Elevator/Rudder
Futaba S9670SV Servos on Ailerons
(4) x 6" Servo Extensions for the Ailerons and Rx to Wing
(1) x 12" Servo Extension for the ESC to Receiver
(1) x 36" Servo Extension for the Elevator
(6) Servo Connector Safety Clips
2.75" or 70mm Spinner
Tools Needed
Blue Painter’s Masking Tape
Thin CA Glue
30 Minute Epoxy
Denatured Alcohol
Paper Towels
Removable Thread Locker (Loctite 242, Blue)
Metric & Imperial Allen Wrenches
Hobby Knife & Fresh Blades
Covering Iron (Trim Iron)
Clamps
Small Flat File
Electric Drill w/ Assorted Small Bits (1/16”, 5/64”)
Small Flat Blade Screwdrivers
Small Phillips Screwdriver
Sandpaper (150-220 Grit)
Pliers
Measuring Tape & Ruler
aj-aircraft.com
Page 4
Covering
The covering on your Laser may have developed loose areas through temperature and humidity changes between
manufacturing and shipping. This may also occur during the summer heat. The covering may require retightening a few
times during your first summer of flying.
Take a few minutes to go over all of the seams making sure all edges are secure. Then proceed to shrinking any area
that may need tightening. (Use an iron on all seams. Use a heat gun on open areas and sheeted areas. An iron can be
used in open and sheeted areas but hold the iron slightly above the surface. You don’t want press the covering into the
wood. Using an iron sock will reduce scratches.
Genuine Ultracote covering.
(White HANU870, True Red HANU866, Midnight Blue HANU885, Silver HANU881)
Wings
Carefully locate the aileron
servo pocket. Shining a light
through opposite side of the
wing will help highlight the
pocket location. Use a new
hobby knife blade to cut
though the covering. Cut
from the corners of the
pocket towards the center of
the pocket so the covering
can be folded in.
Gently snap off the servo wire installation string (if it’s
attached) and temporarily secure it out of the way. Do
not pull it out of the wing!
Use an iron to seal around the servo pocket. Fold the cut
covering under the wing sheeting and attach it to the
inside edge of the pocket.
At 200-220°F (93-104°C) the adhesive on UltraCote® becomes active
allowing the covering to be attached to the model. While 220° will fully
bond the covering to the model it is well below the temperature that
causes UltraCote® to shrink.
At 300°F (149°C) the initial shrinking of UltraCote® begins.
At 350°F (176°C) UltraCote® reaches its maximum shrinking point.
Raising the temperature above this point will not cause further shrinkage.
Use as little heat as needed. Using too much heat may cause reshrinking
issues later.
Pro Tip - If the iron you're using does not display the actual temperature,
here is a tip that will ensure your iron is properly set.Water boils at
212°F. Allow your iron to warm up at a medium setting. When the iron
reaches its stabilized temperature, carefully pour a few drops of water on
the iron's surface. Adjust the temperature until the water just begins to
boil off. This method is surprisingly accurate and is generally within 10°
(of the exact application temperature of 220).
aj-aircraft.com
Page 5
Carefully locate the aileron control horn slots. Use a
covering iron to bond the covering in the area the control
horn will sit. Trim the covering away to expose the slots.
Be sure not to cut through to the top side covering.
The hinges should already be glued into the ailerons.
Give each of them a little pull to ensure they are securely
attached. It’s better to find a loose hinge now rather
than during a flight.
The wings are already slotted for the hinges. Use a
covering iron to secure the covering along the edge of the
wings and ailerons. Look at the wing hinge slots closely.
Make sure the covering will not interfere when gluing the
hinges. Cut away any covering that covers the hinge slot.
Slip each of the aileron hinges into the wing. Align the
end of the aileron to the wing tip.
Push the aileron tight against the wing closing the gap
between the two of them. Move the aileron to its
maximum desired deflection. (About 15°) Notice how
the hinges may pull out slightly. Experiment with the
hinge position finding the best fit before gluing.
Apply a piece of tape next to each hinge. This will help
you locate the hinges when you begin gluing them.
aj-aircraft.com
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Check the aileron position at the hinges and wing tip
again before gluing.
Start with the hinge near the wing tip. Flex the aileron
slightly and apply a few drops of thin CA glue to one side.
Flex the aileron to its maximum desired position. Then
glue the opposite side.
Close the gap between the aileron and wing to the
desired position at the fuselage end of the wing half. Flex
the aileron slightly and apply a few drops of thin CA glue
to both sides of the hinge. Again move the aileron back
and forth to check its position. Once the end hinges are
securely positioned you can apply a few drops of thin CA
to both sides of the remaining hinges.
Use the control horns from the “Wings” part bag.
Use sand paper to roughen the lower portion of the
control horns on both sides. This will help the epoxy
bond to the control horn parts.
Test fit the control horn in the slot. Trim or file the slot as
needed to achieve a snug fit.
The control horn should go in all the way in until the
shoulder contacts the aileron. The linkage hole in the
control horn should be aligned with the hinge centerline.
With the control horn in position apply masking tape
around it. This will help keep excess epoxy off the
covering.
aj-aircraft.com
Page 7
Apply epoxy to the slot in the aileron. Use a pin to help
push the epoxy in.
Apply epoxy to the control horn and insert it into the slot.
Wipe away excess epoxy using a paper towel and
denatured alcohol.
Check the alignment along the hinge line as you did when
you test fit the control horn. Reposition as needed.
Allow the epoxy to partially cure. Peel away the masking
tape after the epoxy is securely holding the control horn
in place and still soft enough to easily remove the tape.
Set the wing aside and let the epoxy fully cure.
Connect the servo to a receiver and power supply. Turn
on your transmitter. Set trim and sub trim to zero. Install
a servo arm on the servo about perpendicular to the
servo’s side. Use the transmitter’s sub trim to make it
exactly perpendicular to the side of the servo.
Attach a servo extension and a safety clip to the servo.
Attach the servo wire to the installation string and gently
pull the wire through the wing as you insert the servo
into the wing.
aj-aircraft.com
Page 8
With the servo installed mark the mounting hole
locations. Pre-drill for servo mounting screws using a
1/16” drill. Install the servo with the wood screws that
came with your servos. Remove the screws and servo.
Apply a drop of thin CA glue into each mounting screw
hole. This will harden the wood around the screws and
provide a more secure installation. (Allow the CA glue to
dry before reinstalling the servo.)
Reinstall the servo.
Assemble a ball link to each end of a connecting rod.
Connect a ball link to a servo horn and the aileron control
horn. Use a socket head screw, a flat washer and a nylon
lock nut. (The brass ball in the link is offset. The larger
reveal side should be against the control horn as shown
below.)
Check the length of the assembly to the servo with the
aileron level with the wing. Once the correct length of
the assembly is found connect the servo arm to the servo.
(Always adjust the connecting rod length with the servo
powered up and centered.)
aj-aircraft.com
Page 9
Landing Gear
Landing gear parts bag contents are shown below.
The landing gear screws are supplied installed in the
fuselage. Remove these screws.
Carefully locate the landing gear slot in the side of the
fuselage just below the leading edge of the wing pocket.
Use a covering iron to attach the covering around the
slot. Make a single cut in the center of the slot the width
of the landing gear.
Slip the landing gear through the slot. Notice that there
are right and left hand parts. The landing gear should be
swept back.
Use 4 flat washers from the parts bag with the screws
removed earlier to attach the landing gear. Add a drop
of removable thread locker to the screws during
assembly.
(A magnet makes installing the screw much easier.)
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