Extreme Flight 104" MXS-EXP ARF User manual

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104" MXS-EXP ARF
Assembly Manual
Copyright 2016 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 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 104 inch MXS-
EXP ARF! The MXS 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 MXS fuselage. This is a
pipe tunnel and will accommodate most canister mufflers and tuned pipes sold
for the current makes of 100-120cc gas engines.
The performance ability of the Extreme Flight RC MXS-EXP is phenomenal!
This sleek, fast and agile airframe is completely unlimited in its ability to
perform the full range of full stall high alpha maneuvers and aggressive
gyroscopic tumbling maneuvers. The MXS is rewriting the rule book on ultra-
aggressive 3D maneuvers! Unrivaled in pitch and yaw authority, the MXS will
be the machine that introduces a whole new level of gyroscopic gyrations and
insane tumbles to the hardcore 3D masses. Rock solid in all aspects of current
3D maneuvers, the MXS will give those that fly on the bleeding edge the
confidence and capability to push through and break new ground in
expanding the rapidly evolving 3D flight envelope. Utilizing the same
lightweight interlocking laser cut construction and carbon reinforcement as
our Extra, the MXS is capable of handling the most punishing maneuvers
imaginable. 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 104
inch MXS!

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Items needed for completion:
Masking or painters tape.
Hobby knife with #11 blades.
Fresh 30 minute epoxy. Pacer Z-Poxy has worked very well for us for many
years.
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. (especially 2.5 and 4mm drivers)
Sanding block and sandpaper.
7 x 500oz (min) torque servos. (8 servos if you use 2 rudder servos)
1 x standard size servo for the throttle.
4 x Extreme Flight 1.5” single aluminum Servo Arms for the ailerons
2 x Extreme Flight 2” single aluminum arms for the elevators (3 if using a tail
mounted rudder servo and 4 for double tail rudders servos)
1 x Extreme Flight 4” double offset aluminum arm for the rudder if using pull
pull rudder setup.
2 x 6” for inboard aileron Extreme Flight 20 AWG Servo Extensions (may not
need any if your servo lead is at least 12”).
3 X 24" Extreme Flight 20 AWG Servo Extensions (2 outboard ailerons 1 for
throttle).
2 x 48”- 60” Servo Extensions. If you need to remove the stabs for transport
use 54”-60". May need 3 or 4 if using tail mounted rudder servo(s).
5” Extreme Flight carbon fiber Ultimate Spinner, 85cc-120cc gas engine and
recommended prop.
Engine standoffs, 1.125” length if using the recommended DA120
Some type of engine mufflers (stock, canisters or tuned pipes and headers)
Receiver, batteries, switches, EF Flowmaster 34 ounce fuel tank and tubing.

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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 high quality, fresh epoxy for installing the composite control
horns and hinges. We highly recommend Pacer Z-Poxy 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. Take the time to properly balance and trim your aircraft and set up
rates with exponential values. Your flying experience will be greatly
enhanced once your plane is properly dialed in.
7. Extreme Flight now has their own Vimeo channel. There are many
assembly videos providing extreme detail on certain aspects of the
assembly of this very model produced by Extreme Flight team pilot
Jeff Williams.

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Let's Begin:
1. Locate the wing panels/ailerons and horizontal stabilizers/elevators and
associated hardware bags. We will begin by hinging all of these at one time. I
suggest you scuff/rough the surface of the hinges, they are slick from the
manufacturing process and the glue will adhere better to a non-slick surface.
Using 100-150 grit sandpaper works well to do this, be sure you don't sand the
barbs off the hinge, you just want a little scuffing on the hinge, do not sand
at the pivot. I strongly recommend 30 minute (or slower curing) epoxy for
installing hinges. I have found it easier to apply 3-5 drops of glue in the hinge
hole and then using a toothpick, or similar, spread the glue around the sides of
the hinge hole. Do this on just one side, either the wing or aileron it does not
matter which is first. Mix only enough glue to work with one panel at a time.
Before applying any glue to the hinge itself, I highly recommend you protect
the hinge pin (pivot point) from glue. I use Vaseline, but tape will work
however it is harder to remove later, in any case apply either protectant to the
center of the hinge so glue cannot penetrate that pin, it will cause binding.
Once you have the holes lathered with glue, apply a small amount to the hinge
barbs and insert into the hinge hole twirling it as you insert it until the pin is
even with the hinge line. Be sure your hinge pivots freely and is perpendicular
to the hinge line. Allow to dry then mate to the appropriate surface (wing to
aileron/horizontal stabilizer to elevator) and allow that to dry. Refer to figure
1 for the 3 clipped horizontal stabilizer hinges, all other hinges are normal
length.

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Figure 1
2. Install the control horns for the ailerons, be sure to note that the outer
horns are the ones with the upper hole and the inner horns have it located
nearer the middle (Figure 2). Once you have them inserted into the holes I
advise you temporarily install the 3mm bolt and ball link, this is only to keep
the control horns spaced properly and evenly, remove them once the glue is
dry. You may also install the elevator control horns at this time. Be sure to
scuff the bottom portion of the control horn that inserts into the hole in the
control surface. Trial fit the base plate and control horn before gluing,
sometimes balsa pieces and/or dust will be down in the hole and need cleaned
to allow the control horn and base plate to fit down flush on the surface. (You
should not have to trim the portion of the control horns that fit into the holes.)
Once you have this be sure to trim the covering around the base plate but not
beyond the base plate. Install the aileron servos and orient the output shaft of
the servo towards the hinge line and install all the pushrods/ball links for the
ailerons. To do this use the 3mm bolt and washer thru the control horn, then
the ball link in the middle, then thru the other control horn, then the washer
and nylon insert nut onto the other side with blue thread lock, nothing goes
between the control horns except the ball link, no washers are necessary.

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Then hook it to your servo arm in the same manner and use blue thread lock.
See Figures 3 & 4.
Figure 2
Figure 3
Scuff this portion only

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Figure 4
3. Install the elevator servos, orient the output shaft toward the hinge line of
the horizontal stabilizer. It will be easier to install the servo arms after
mounting the servo. Make all hookups for the pushrods/ball links as we did in
the previous step. See Figure 5.
Figure 5

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4. Hinge the rudder and install the control horns using the same technique(s)
as the wing. Then you can mate the rudder to the vertical stabilizer. See
Figures 6 & 7.
Figure 6
5. Mount your rudder servo in the rear (Figure7) or the center mount
location just aft of the wing tube inside the fuselage which will require a pull
pull setup (hardware is included). If you are running stock mufflers a rear
mounted direct drive servo setup works great for CG purposes.
If you want to run cans or pipes you can still use an aft mount servo setup and
then mount your Receiver/ignition batteries further forward if necessary.
Otherwise mounting the batteries in the same location/tray as the rudder
servo will work. See appendix A in the aft portion of this manual for a pull
pull installation.