Extreme Flight LASER EXP ARF User manual

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74” LASER EXP ARF
Instruction Manual
Copyright 2014 Extreme Flight RC
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Please take a few moments to read this instruction manual before beginning assembly.
We have outlined a fast, clear and easy method to assemble this aircraft and familiarizing
yourself with this process will aid in a quick, easy build.
Please read the following paragraph before beginning assembly
of your aircraft!
THIS IS NOT A TOY! Serious injury, destruction of property, or even death may result
from the misuse of this product. Extreme Flight RC is providing you, the consumer, with
a very high quality model aircraft component kit, from which you, the consumer, will
assemble a flying model. It is beyond our control to monitor the finished aircraft you
produce. Extreme Flight RC will in no way accept or assume responsibility or liability for
damages resulting from the use of this user assembled product. This aircraft should be
flown in accordance with the AMA safety code. It is highly recommended that you join
the Academy of Model Aeronautics in order to be properly insured and operate your
model at AMA sanctioned flying fields only. If you are not willing to accept ALL liability
for the use of this product, please return it to the place of purchase immediately.
Extreme Flight RC, Ltd. guarantees this kit to be free of defects in materials and
workmanship for a period of 30 DAYS from the date of purchase. All warranty claims
must be accompanied by the original dated receipt. This warranty is extended to the
original purchaser of the aircraft kit only. Extreme Flight RC in no way warranties its
aircraft against flutter. We have put these aircraft through the most grueling flight tests
imaginable and have not experienced any control surface flutter. Proper servo selection
and linkage set-up is absolutely essential. Inadequate servos or improper linkage set up
may result in flutter and possibly the complete destruction of your aircraft. If you are not
experienced in this type of linkage set-up or have questions regarding servo choices, please
contact us at [e-mail] or 770-887-1794. It is your responsibility to
ensure the airworthiness of your model.

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Congratulations on your purchase of the Extreme Flight RC 74 inch LASER EXP!
This aircraft is unique in that it is being offered in two versions: A gas version and a
dedicated electric version to satisfy the growing legions of electric power enthusiasts.
There are subtle differences in the construction of these two versions to accommodate the
installation of the chosen power systems. The gas version can be effectively powered by a
30cc-40cc gas engine. The electric version will perform best when powered with a 2500-
3500 Watt power system on 8S-12S Lithium Polymer batteries. Either version will allow
you to perform aggressive 3D maneuvers with an economical power plant, allowing you
to experience the performance and stability of a much larger aircraft at a considerable
savings.
The Extreme Flight LASER EXP is loaded with unique features, including first rate
hardware, components and thorough instructions to ensure a trouble free assembly and
set-up. Weight saving components are used throughout, such as carbon fiber structural
reinforcement, carbon fiber wing and stab mounting tubes, carbon fiber landing gear,
titanium pushrods and a carbon fiber tail wheel assembly, all ensuring the lightest, most
high performance aircraft possible. You will notice there is a box built into the bottom of
the gas version of the LASER EXP fuselage. This is a pipe tunnel and will accommodate
most canister mufflers and tuned pipes sold for the current makes of 30-40cc gas engines.
Like all of the EXP series, the Laser excels at both 3D and precision maneuvers. It shares
the long tail moment of the Extra and Edge which gives it great stability in high speed
precision maneuvers and it also features that famous EXP elevator that allows for crazy
pitch authority and great stability in high alpha maneuvers. When the CG is properly set
the Laser has minimal coupling and is a very neutral aircraft.
We have spent a great deal of time and effort to provide you, the discriminating aerobatic
enthusiast, with the highest quality, most complete package possible. We are very proud of
the end result of our labor and wish you great success with the assembly and flying of
your Extreme Flight RC 74 inch LASER EXP!
Ultracote color codes for the Laser are as follows:
Red/White classic color scheme:
True Red HANU866 White HANU870
Yellow/Blue/White color scheme:
Bright Yellow HANU872 White HANU870 Midnight Blue HANU885

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Items needed for completion:
Masking tape.
Hobby knife with #11 blades.
Thin and medium CA. We highly recommend Mercury M5T thin and M100XF
medium formulas as well as the Mercury glue tips.
30 minute epoxy. Mercury Adhesives Epoxies have worked very well for us.
Blue Loctite.
Electric drill with an assortment of small drill bits.
Small flat head and Phillips head screw drivers.
Standard and needle nose pliers.
Side cutter
Metric ball driver or allen key set.
Sanding block and sandpaper.
5 x METAL GEARED servos with a minimum of 300 oz. in of torque.
Aluminum Servo Arms – 2 x 1.5”single arms, 2 x 2" single arms and 1 x 3.5” double
arm.
2 x 6” Servos Extensions
2 x 12” Servo Extensions
2 x 24” Servo Extensions
76mm Spinner
Gas Version
30cc-40cc gas engine
20x8-21x8 prop
Electric Version
2500-3500 Watt Brushless Power System
80 to 120 amp HV ESC
8S to 12S Lithium Polymer batteries
Recommended prop for your chosen power system
Please note: The LASER EXP assembles in the same manner as our other
similar sized models. As a result some of the photos in this manual may be of
other aircraft if we determined they better illustrated the assembly step.

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Tips for Success:
1. Before starting assembly, take a few minutes to read the entire instruction manual
to familiarize yourself with the assembly process.
2. Please take a few minutes and go over all the seams on the aircraft with a covering
iron on a medium heat setting. Due to climate changes that the airframe
experiences on the way over from China, wrinkles may develop in the covering.
These are easily removed with a little bit of heat. Use a 100% cotton tee-shirt or a
microfiber cloth and your heat gun and heat the covering while gently rubbing the
covering onto the wood. Be careful not to use too much heat as the covering may
shrink too much and begin to lift at the edge. Take your time, and a beautiful, paint-
like finish is attainable.
3. Take a few minutes and apply CA to high stress areas such as servo mounting trays,
landing gear mounts, anti-rotation pins, and motor box joints.
4. By the time your aircraft arrives at your door step, it will have been handled by a lot
of people. Occasionally, there are small dings or imperfections on some of the
surfaces. An effective method to restore these imperfections to original condition is
to use a very fine tipped hypodermic needle and inject a drop of water under the
covering material and into the ding in the wood. Apply heat to the area with a
sealing iron and the imperfection will disappear. Deeper marks may require that
this process be repeated a couple of times to achieve the desired result, but you will
be surprised at how well this technique works.
5. Use a high quality epoxy for installing the composite control horns and hinges. We
highly recommend the new Mercury Adhesives 30 minute Epoxy as well as Pacer
Hinge Glue. We are very pleased with the results and ease of application and
cleanup of these products.
6. When applying decals, first clean the area where the decal will be applied with
alcohol. Mist the area lightly with Windex or Rapid Tack before applying the decal
which will allow you to properly position it, and then use a rubber squeegee to push
all of the liquid from under the decal. This will result in very few air pockets
trapped under the decal.
7. Take the time to properly balance and trim your aircraft and set up rates and
exponential values. Your flying experience will be greatly enhanced once your plane
is properly dialed in.

Let's begin!
Elevator Assembly
1. Locate the horizontal stabilizer/elevator assemblies as well as the composite control
horns and base plates from the elevator hardware package. Use a sharp #11 blade
or soldering iron to remove the covering over the 2 slots for the elevator control
horns on the bottom of the elevator surface.
2. Insert the 2 control horns into the base plate and trial fit thehorns into the slot,
making sure they seat properly against thebase and elevator surface. If necessary,
sand the bottom of horns to ensure proper fit in the elevators.
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3. Trace around the base plate with a felt tipped marker.
4. Remove the horn assembly and use a #11 blade to remove the covering from inside
the ink line you traced around the control horn base.
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5. Wipe away the ink line with a cotton cloth or paper towel soaked in denatured
alcohol.
6. Use sandpaper to scuff the portion of the horns and base plate that will be inserted
into the elevator.
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7. Apply 30 minute epoxy to the elevator slots using a zip tie to ensure the slots are
filled will epoxy.
8. Apply a generous amount of epoxy to the bottom of the G-10 control horns and
base plate.
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9. Reinsert the assembly into the elevator and wipe away any excess epoxy with a
cloth and denatured alcohol. Place a 3mm bolt through the horns to help insure
proper alignment and set aside to dry. Repeat for the other elevator half.
10. Next remove the pin hinges from the horizontal stabs. Take note that one pin is
shorter than the others - this is to allow for clearance of the stab tube.
Note: There are several methods and adhesives that can be used for installing the
hinges. We will describe the way we do it as this method has proven itself over many
years of model building.
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11. Use a cotton swab to apply petroleum jelly ONLY to the knuckle of the hinge. This
will keep the epoxy from getting into the hinge which can cause it to bind.
12. Mix a generous batch of 30 minute epoxy. Use a zip tie or an old pushrod to
thoroughly coat and fill the hinge holes on the stab with epoxy.
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13. Next, coat one side of all 4 hinges with epoxy and push the hinges into the holes
of the horizontal stab. Remember the short hinges go in the hole closest to the
fuse.
14. Make sure the hinge pins are centered in the hinge gap and that they pivot 90
degrees to the stab.
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15. Now coat the other side of the hinges as well as the hinge holes in the elevator
with epoxy and install the elevator into the stab. Don’t forget to apply epoxy in the
hinge holes on the stab before installing the stab to the elevator.
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16. Use denatured alcohol and a cloth to remove all excess epoxy, especially on the
hinge pin. Make sure you have full deflection in both directions – once satisfied
with the results, set the surface aside to dry. After the hinges have dried
thoroughly, pull on them to make sure they are properly installed.
Note: Now is a good time to seal the hinge gap with a strip of Ultracote or Blenderm
tape.
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Wing Assembly
17. Locate the wing/aileron assemblies as well as the composite control horns and
base plates from the wing hardware package. Following the same procedure as
outlined with the elevator/stabs, install the control horns and hinges for both
wings. Each wing has 5 hinges so it’s best to install the hinges in the aileron first
then mix a second batch of epoxy to install the aileron hinges to the wing.
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Note: Before moving to the next step – it would be a good time to seal the hinge gap
with a strip of Ultracote or Blenderm tape. Be sure to fully deflect the control
surface when sealing the gap to allow for full deflection once the gap is sealed.
Also, take a few minutes to go over the wings with a trim iron on a medium heat to
seal all the trim seams and remove any wrinkles in the covering. Use caution and
avoid excessive heat as you may cause the Ultracote to shrink too much and lift at
the seams.
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18. Locate the aileron servo mount and remove the covering from this area. Use a
sealing iron to seal the edges of the covering to the sides of the servo opening. Take
a few minutes to apply some CA to the joints of the servo rails and the ribs.
19. Attach a 6” servo extension to your servo and secure with thread or heat
shrink tubing. Attach the recommended 1.50” SWB Servo arm and electronically
center the servo arm. Use the manufacturer supplied mounting hardware to install
the servo with the output shaft toward the trailing edge of the wing.
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20. Locate and attach the 2 ball links onto the titanium turnbuckle pushrod.
Secure the pushrod to the control horns and servo arm using the supplied 3mm
bolts, washers, and nylon insert locknuts as shown in the picture below. As always,
use blue Loctite on ALL bolts!
21. Use a soldering iron or a sharp #11 blade to remove the covering from the
blind nuts on the wing tip. This is for attaching the SFG’s.
Note: Repeat this process for the other wing. Clean the wings with Windex and set
them aside.
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Rudder and Tailwheel Assembly
22. Locate the rudder, the rudder control horns and the 2 slotted base plates. As
with the elevators, use a sharp #11 blade to remove the covering from the 2 pre-cut
slots in the rudder.
23. Temporarily install the control horns and base plates without epoxy. Ensure
that the control horns center in the rudder properly. Mark the side of the control
horn with a felt tipped marker as a reference point for preparing the control horns
for installation.
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24. Scuff both sides of the middle section of the horns between the reference
marks made in the previous steps. Also scuff one side of both base plates as well.
25. Mix a generous batch of epoxy and completely fill the two slots as well as the
areas on control horns and base plate that will glue into the rudder.
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