Extreme Flight LASER EXP ARF User manual

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91" LASER EXP ARF
Assembly Manual
Copyright 2017 Extreme Flight

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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 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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Experience the evolution in 70cc aircraft design and performance! By far the most
technologically advanced aircraft from Extreme Flight in this size, the new 91" Laser EXP
is a marvel of modern construction techniques and unbridled aerobatic performance.
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 Laser fuselage. This is a pipe tunnel and will accommodate most canister mufflers and
tuned pipes sold for the current makes of 50-70cc gas engines.
The Laser EXP is quite possibly the best all around aerobat that we produce. It excels in
old school low and slow 3D yet flies precision and XA as well as anything in our lineup. If
you have shied away from the Laser thinking it is an old outdated design, think again!
Extreme Flight has turned the Laser design into a modern fire breathing aerobatic
masterpiece!

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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. Pacer Z-Poxy is a long time favorite.
✓Blue and Red Loctite.
✓Electric drill with an assortment of small drill bits.
✓Small flat head and Phillips head screw drivers.
✓Standard and needle nose pliers.
✓Side cutters.
✓Metric ball driver or allen key set.
✓Sanding block and sandpaper.
✓5 x MKS HV-777A, HBL-380 X8 or comparable servos.
✓1 x standard size servo for the throttle. MKS 1250 is a great choice.
✓Extreme Flight Socket Head Servo Screws
✓2 x 1.5” Extreme Flight aluminum servo arms for the ailerons
✓2 x 2” Extreme Flight aluminum arms for the elevators
✓1 x 4” Extreme Flight double aluminum arm for pull-pull rudder.
✓1 1.5" Extreme Flight aluminum servo arm if using push-pull rudder
✓2 x Extreme Flight 6” 20 awg Servo Extensions.
✓2 x Extreme Flight 12” 20 awg Servo Extensions.
✓1 24" Extreme Flight 20 awg Servo Extension.
✓2 x 36” Extreme Flight 20awg Servo Extensions. If you need to remove the stabs for
transport use 48" extensions.
✓1 36" Extreme Flight 20 awg servo extensions if using rear mounted rudder servo
and push-pull assembly
✓Extreme Flight Servo Safety Clips
✓4” Spinner.
✓60cc-70cc gas engine and preferred muffler/canister/pipe setup.
✓Blazing Star engine mount
✓1/4-20 x 1.75" engine mounting bolts, washers and nuts.
✓24 ounce Extreme Flight Flowmaster tank
✓Extreme Flight gas tubing and Fuel Dot
✓Engine Manufacturer recommended prop.
✓Optional-Extreme Flight Anodized Washer sets to add some bling!

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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. Go over all the seams on the aircraft with a covering iron on a medium heat setting.
Also, due to climate changes, wrinkles may develop in the covering. These are easily
removed with a little bit of heat. Use a 100% cotton tee-shirt and your heat gun and
heat the covering while gently rubbing the covering onto the wood with the t-shirt.
Be careful not to use too much heat as the covering may shrink too much and begin
to lift at the edges. Take your time, and a beautiful, paint-like finish is attainable.
3. Apply CA to high stress areas such as servo mounting trays, landing gear mounts,
anti-rotation pins, wing and stab root ribs, and motor box joints etc.
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 Pacer Z-poxy. We are very pleased with the results and ease of
application and cleanup of this product.
6. 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.
Please Note: Because the assembly process is basically the same for all of the models in
this size, some photos may show parts from another model if it was deemed that these
photos better illustrated the assembly step.

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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. Trial fit the assembly into
the slots in the elevator.
2. Trace around the base plate with a felt tipped marker.

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3. 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.
4. Wipe away the ink line with a cotton cloth or paper towel soaked in denatured
alcohol.

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5. Use sandpaper to scuff the portion of the horns and base plate that will be inserted
into the elevator.
6. Apply 30 minute epoxy to the elevator slots using a zip tie to ensure the slots are
filled will epoxy.

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7. Apply a generous amount of epoxy to the bottom of the G-10 control horns and
base plate.
8. 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.

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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.
9. 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.
10. Next, coat one side of the hinges with epoxy and push the hinges into the holes of
the horizontal stab.