Twisted Hobbys Big Turbo Beaver User manual

Rev: 2015.06.28.v01c page 1
USA Distributor
Twisted Hobbys
www.twistedhobbys.com
Big Turbo Beaver
MOTOR: 1x 72g / 1000 to 1200kV Outrunner
ESC: 1x 30amp
SERVOS: 4x 14g / 2x 5g
PROP: 10x3.8 SF Prop
BATTERY: 3s / 1000-1350mAh
RADIO: 4 to 7 channel
WINGSPAN: 43-1/2”
LENGTH: 39-3/8”
AUW: 630g (depends on equipment)

Rev: 2015.06.28.v01c page 2
SAFETY NOTES
 Before assembling and flying this model, read carefully any instructions and warnings of other
manufacturers for all the products you installed or used on your model, especially radio
equipment and power source.
 Check thoroughly before every flight that the airplanes’ components are in good shape and
functioning properly. If you find a fault do not fly the model until you have corrected the
problem.
 Radio interference caused by unknown sources can occur at any time without notice. In such a
case, your model will be uncontrollable and completely unpredictable. Make sure to perform a
range check before every flight. If you detect a control problem or interference during a flight,
immediately land the model to prevent a potential accident.
 Youngsters should only be allowed to assemble and fly these models under the instruction and
supervision of an experienced adult.
 Do not operate this model in a confined area.
 Do not stand in line with, or in front of a spinning propeller and never touch it with any object.
IMPORTANT: PRIOR TO ANY ASSEMBLY
Please Note: after removing kit from shipping box, lay each piece flat on a
hard surface, this will allow the airframe to straighten out if lightly bent
from shipping. Do not worry since EPP is very pliable and can be bent back
if out of shape.

Rev: 2015.06.28.v01c page 3
TWISTED HOBBYS
Website: www.twistedhobbys.com – email: [e-mail]
Thank you for your purchasing a Twisted Hobbys‘ model. Please read through the entire manual before beginning to
build this model. If you have any questions please contact us at the above indicated email address.
WARNING INFORMATION
This R/C Aircraft is not a toy! Read and understand the entire manual before assembly. If misused, it can cause serious bodily harm and
property damage. Fly only in open areas, and AMA (Academy of Model Aeronautics) approved flying sites. Do not over look the warnings
and instructions enclosed or those provided by other manufactures’ products. If you are not an experienced pilot and airplane modeler you
must use the help of an experienced pilot or an authorized flight instructor for the building and flying of this model aircraft.
These instructions are suggestions only on how to assemble this model. There are other ways and methods to do so. Twisted Hobbys has
no control over the final assembly, the materials and accessories used when assembling this kit, or the manner in which the assembled
model, installed radio gear and electronic parts are used and maintained. Thus, no liability is assumed or accepted for any damage
resulting from the use of the assembled model aircraft or from this instruction manual including but not limited to direct, indirect,
incidental, special, and consequential damages. By the act of using this user-assembled product, the user accepts all resulting liability. In
no event shall Twisted Hobbys’ liability exceed the original purchase price of the kit.
SHIPPING DAMAGE
Twisted Hobbys checks each plane before shipping to ensure that each kit is in fine condition. We have no bearing on the condition of any
component parts damaged by use, modification, or assembly of the model. Inspect the components of this kit upon receipt. If you find any
parts damaged or missing, contact Twisted Hobbys immediately. We will not accept the return or replacement of parts on which assembly
work has already begun. Twisted Hobbys reserves the right to change this warranty at anytime without notice.
OUR MISSION
To provide the best products and service to our customers at the lowest prices possible. We take great pride in
our company, our commitment to customer service and in the products we sell. Our online store is designed
to provide you with a safe and secure environment to browse our product catalog.
Thank you for shopping with Twisted Hobbys!

Rev: 2015.06.28.v01c page 4
kit contents
Fuselage Parts
Double check that you have all the
above pictured items. Note - Some
kits might have slight deviations from
the above pictured items.
Wing, Tail Surfaces and Carbon Spars
Double check that you have all the
above pictured items. The Carbon
Bundle includes tail push rods and
wing spars. Note - Some kits might
have slight deviations from the above
pictured items.

Rev: 2015.06.28.v01c page 5
kit contents (cont.)
Hardware Kit Detail
Double check that you have all the
above pictured items. Note - Some
kits might have slight deviations from
the above pictured items.
Plywood, Foam and Hardware Kits
Double check that you have all the
above pictured items. The Hardware
kit items are detailed to the right.
Note - Some kits might have slight
deviations from the above pictured
items.

Rev: 2015.06.28.v01c page 6
TOOL AND ADHESIVES NEEDED
Tools shown and listed are suggestions only.
Depending on your building technique you may not
need everything indicated – and/or – you may find that
other tools available to yourself may be of benefit to
your Build.
It is also recommended that you have a flat building
surface, one that will accept stick pins and push pins.
An Acrostic Ceiling panel from your local hardware
store fits this bill nicely, and will lay flat on your work
table. Over size / long push pins are available at your
local craft store. These two items are by no means
required, but will aid in the building process, and can
be used for future projects
Lighter
Small Drill Bits
Tape Measure and Ruler
Black Sewing Thread
Welders Glue
Hobby Knife w/new Blade
Needle Nose Pliers
Wire Cutters
Low Temp Hot Glue Gun
Course Sand Paper
Scissors
Small Phillips Screw Driver
Thin and Medium CA
CA Applicator Tips
Activator

Rev: 2015.06.28.v01c page 7
the build
CONSTRUCTION METHODS:
Building surface should be at least 2ft x 4ft and at. Weights or some small heavy objects will be handy for holding things in place
during the time glue is setting.
Welders glue is used for FOAM TO FOAM joints. Thin and Medium CA are used on the PLASTIC TO FOAM and CARBON TO FOAM
joints. When using the Welders glue for a butt joint, apply a thin lm to each surface, allow to sit for approx ve minutes and
then assemble. Note that this method will create a nearly instant bond, so locate carefully when bringing the two pieces together. If
alignment is necessary or a slip joint, do not allow the glue to tack up, simple apply and join immediately, you will have several
minutes to locate the two parts before the glue sets up. In most cases the parts being glued can be handled with care in 30 minutes,
full cure is approx 24 hours.
The above picture items will be needed to nish the model.
A power combo (Twisted Hobbys’ Combo pictured above), a
3s/1300mAh battery and a fresh tube of Welders. Note -
the Battery and Welders are NOT part of the power combo,
everything else shown is.
Start the build by locating the two wing halves, the elevator
and the rudder. Fold back as shown and weigh them down
for about an hour. This will loosen up the hinge line and
allow the surfaces to move much more freely. The wing
hinge will be stiff... work it slowly so it doesn’t tear

Rev: 2015.06.28.v01c page 8
While the control surface are relaxing,
gather up all your radio gear.
IT IS IMPERATIVE TO DO THE
NEXT COUPLE STEPS PRIOR TO
INSTALLATION!
Attach connector to the ESC that
matches the batteries you will use.
Note - if using the recommended
battery and ESC location you will need
to make an extension. See page 37.
Plug everything in, bind the radio per
mfg instructions and check that all the
servos operate correctly and smoothly.
Hang on to the motor near the wires,
and test it’s operation as well.
Using the “tack up” method apply a
skim coat to the mating surfaces.
Note - you have to build a Left and
Right had version. Take this into
account when applying the glue.
Locate the above items needed for the
Lead Edge Flap (LEF) assemblies.
Screws shown are the 4 tiny M2x5
screws that are located in the hardware
bag.
With many ESC’s it is required to
program throttle end points. Follow the
mfg instructions for this operation and
complete the process at this time.

Rev: 2015.06.28.v01c page 9
Attach the plastic pieces as shown,
lining up their proles with the prole
of the LEF. Again, be sure and make a
left and right version of these two
pieces.
With the M2x5 screws, attach the wood
pieces as shown. Note that they go on
the INSIDE of the plastic pieces. The
wood pieces must pivot, so do not over
tighten the screws.
When completed you should have
something that looks like the above
parts.
Using thin CA and kicker, glue the
wood pieces of the LEF to the wing, be
very careful that you do not get glue in
the area that pivots.
Fully engage the wood pieces and make
sure there is no binding of movement
when exercising the LEF.
Test t wood pieces of the LEFs into
their respective slots in the wings
leading edge. Note - the plastic piece
with the horn is INBOARD and on the
UNDER side of the wing.

Rev: 2015.06.28.v01c page 10
Make sure you have equal amounts of
up and down movement as shown in
this and the next picture.
Movement in the opposite direction
should be approx equal to the
movement in the previous picture. Note
this does not have to be exact, just
similar.
Apply a medium tack up coat to the
mating surfaces of the items shown
above. Note - the UNDERSIDE of all the
pieces should be facing UP.
In addition to the spars you will need
the above picture two items from one of
the wood kits.
Installing the 1x3x980mm carbon spars
in to the wing is next. Locate the spars,
these should just have been loose in
the box.
Once the glue has tacked up, join the
pieces together making sure that the
airfoil proles align as perfectly as
possible.

Rev: 2015.06.28.v01c page 11
The wood pieces will install into the
pre-cut slots pictured above. Welders
should be used for this.
Apply a Wet coat of Welders to both
sides of the part AND squeeze a little
into the slot area. If possible keep the
“notch” free of glue. Then slide the
wood piece in, arrow pointing forward.
Slide the wood piece in until it is ush
and wipe away any excess glue that
squeezed out
Once the whole length of the spar is
install, it should look similar to the
above picture.
Install the spar DRY. Make sure that
the slit you cut was “just” deep enough
so that the spar when fully seated will
be ush with the wings surface.
Next, cut a 3mm deep slit, centered and
long enough to accommodate the
carbon spar. Location front to back is
determined by the relief cut in the small
wood pieces just installed

Rev: 2015.06.28.v01c page 12
Once you are happy with the depth of
the spar, wick in some thin CA for the
entire length and hit with kicker.
Flip the wing over and repeat the
process on the top side.
Locate the wood piece shown above and
coat it with a medium amount of
Welders and with the nozzle of the tube
squeeze some Welders into the slot.
Once the Welders has tacked up, bring
the two pieces together. Align them on a
at surface and use the trailing edges
as reference.
Grab the black two counter balance
pieces that glue onto the end of the
ailerons. Coat the them mating surfaces
with a lm of Welders and let tack up.
Install the piece as shown, from the
under side. Make sure that ts ush on
the top side, and ush everywhere on
the bottom except where it gets wider
for the hook.

Rev: 2015.06.28.v01c page 13
Locate the servos that will be used for
the LEF’s. Depending on the size servo,
you may or may not need to adjust the
size of the cut out.
Figure out where the slits need to go for
the ears of the servo, and adjust the
size of the pocket if necessary. Make
sure that the output arm of the servo
lines up with the horn of the LEF
Repeat for the other side. Some servos
may stick up a little from the surface of
the wing, this is ne.
Press the servo into position.Locate the slits for the servo tabs by
lining up the output shaft/horn with
the center of the slot in the wing as
shown above.
Locate the servos that will be used for
the ailerons. As with the LEF’s, the size
of servo being used will determine if
there needs to be any trimming of the
pre-cut pocket.

Rev: 2015.06.28.v01c page 14
Aileron servo installed. Repeat for the
other side.
Now you can route the wires towards
the cabin area. Route in such a way
that the left over wire will be the longest
in the general area where you plan to
locate the receiver.
In this build the position of the Receiver
has been determine to be near the
tailing edge of the wing, in the cabin
area, this will minimize the potential
need for extensions.
With the servo electronically center and
the LEF in it’s neutral position,
measure the distance from hole to hole
of the horns.
Locate the clevis and rods as shown.
The shorter rods are 1.5mm dia x
25mm long and the longer rods are
1.5mm x 45mm. Note these dimensions
may vary some from kit to kit.
Repeat for the other side, keep the slits
you cut to a minimum depth, all that is
needed is just enough to bury the servo
wire.

Rev: 2015.06.28.v01c page 15
Duplicate the dimension in the holes
spacing of the clevises. Use medium CA
to secure the rod to the clevis. Do one
end rst than measure again. Make
sure the orientation is correct.
Attach the control rod between the
servo and the LEF. If it is slightly off
center, this can be adjusted with sub-
trim later when setting up the radio
program.
Repeat for the other side.
With the control surface and servo both
in neutral positions, measure from hole
to hole like was done with the LEF.
Put a skim coat of Welders on the base
of the horn, and squeeze some into the
slot with the nozzle of the tube. Install
the horn while the glue is wet and
position the horn as needed.
Next cut a slot in the wing for the
aileron control horn. Use a square to
get the slot in line with the servo arm.
Cut the slot so that the clevis hole in
the horn will be on the hinge line.

Rev: 2015.06.28.v01c page 16
Position the holes in clevises as you did
with the LEF and secure them to the
rod with medium CA. Make sure that
the orientation is correct.
Connect the control rod to the servo
and aileron control horn as shown. If
any adjustments are needed they can
be done later with subtrim.
Repeat the process for the other side.
This completes the Wing building, it
can be set aside for now and work on
the fuselage can begin.
With the nozzle of the Welder’s tube,
squeeze a small bead of glue into the
respect slots and install the strips as
shown while the glue is wet. Note - One
of the long ones is left out for now.
Locate two of the 1x5x300 carbon strips
and one of the 1x5x200 carbon strip.
Make sure the slot in the foam is deep
enough to receive each of the strips.
Now that the Wing is complete the
fuselage is next. Using the tack up
method, attach the landing gear
fairings as shown with the slots lining
up between the two pieces

Rev: 2015.06.28.v01c page 17
Use stick pins or weights to hold
everything at while the glue dries.
Once the glue dries from the previous
step, ip both pieces over and locate
the above pictured wood doublers.
Apply a medium bead of Welders on all
areas of the wood’s back side.
Locate the above pictured wood items
and the two small alum threaded insert
nuts.
Repeat for the other side and with stick
pins or weights, let the glue dry before
moving these pieces around. It is
important to make a left and right, and
that the wood is on the sides shown.
While the glue is wet, attach the
doubler as shown above. Note there are
two different slots in the foam and the
doubler that need to line up. Slide the
wood around until the slots match up.

Rev: 2015.06.28.v01c page 18
Fit the three center bridge pieces
together as shown above. It may be
necessary to sand of le on the mating
area.
Make sure the orientation of the three
parts is as shown in this picture and
the previous one
With thin CA and kicker, glue the three
pieces together.
Locate the body half shown above and
split it in the tabbed area. Using the
small points in the foam as a guide to
where the center of the tab is.
Repeat the process for the second nut
insert
With a little dap of Welders attach the
nut insert as shown. Keep the threaded
area free of glue.

Rev: 2015.06.28.v01c page 19
Install the cross members now in to the
slots of the part that was just
seperated. Note - this is a dry t... NO
glue at this time.
Find the motor mount in the wood kit
and remove it. Note - production kits
will have two different hole patterns to
accommodate different style motor
mounts.
In the fuselage half that is whole,
install the motor mount as shown using
the Wet Welders method... laser etched
rectangles facing rearward.
Carefully bring the two pieces together,
making sure that the slots in the foam
and the slots in the wood pieces are all
lining up. Don't forget to put glue in the
motor mount area.
Again... Using the Wet Welders method
apply Welders to all the FOAM areas
where the two up portions of the
fuselage joint together. Do not put any
glue on any of the wood pieces yet.
Make sure and get glue in all the
contact areas. Wipe away any excess
that squeezes out.

Rev: 2015.06.28.v01c page 20
Make sure all the contact area are fully
engaged. Check the motor mount area
to ensure that the tabs of the mount
are centered in their respective foam
slots.
There should still be NO glue on the
wood areas shown above, but it is
necessary to make sure that all the
tabs are fully engaged and sitting ush
in their slots
Wipe away any excess glue and double
check all the joints.
Let all this dry for a little while, use
weights to keep everything at and true
while the glue dries.
Now... that all the foam pieces are glued
and square, use thin CA and secure the
tabbed and slotted wood areas shown
above
With a Builder Square, check several
spots along the length of the fuselage
for squareness.