JTA Innovations Extra JD User manual

www.modellmarkt24.ch
JTA Innovations ” Etra JD
www.modellmarkt24.ch

www.modellmarkt24.ch
Please yead For Your Safet

The poduct that you hae eceied is not a toy. Please undestand that model
aicaft hae seeal moing pats and euipment that if misused, can not only
cause ham to othe mateials and objects, but also to you and othes aound
you. JTA Innoations is not accountable o esponsible fo any eents o
incidents that cause damage, injuy, o een death. Afte puchase and
eceiing of this poduct, the custome is fully esponsible fo the assembly
and use of the model. We cannot monito the pocedue/methods used in
assembling o flying of the model. If opeating in the United States, please
make sue that you hae membeship ith the Academy of Model Aeonautics
and follo AMA ules. Please opeate the model at AMA flying sites. If liing
outside of the US, please follo the ules of model aiation opeation in you
egion. JTA Innoations is not esponsible fo any disegad o beaking of
these ules. Pio to being shipped to each custome, aifames ill be checked
fo any damages. We hae no contol oe hat happens duing the shipping
pocess. If any poduct is deemed defectie by a custome, please contact JTA
Innoations ith poof of defect most likely photo o ideo, and poof of
puchase including puchase date. JTA Innoations ill analyze you claim and
handle the situation case by case.






www.modellmarkt24.ch

www.modellmarkt24.ch

Tools/Supplies needed
Including but not limited to:
 -Ruler
-Building Adhesive
-Foam safe CA or and regular CA
-Hobbyknife with blades
-Scissors
-Heat gun or lighter for heat shrink
-Assorted phillips and flat blade screwdrivers
-Assortment of small drill bits
-Drill
-Needle nose pliers
-Driver set
-90 degree square
-CA accelerator
-Sandpaper
- Wax Paper for a building surface


www.modellmarkt24.ch

www.modellmarkt24.ch
Airframe Description
From drawing, scaling, flight testing, etc., the Extra JD is the product of
worldwide team collaboration. We are confident that this product will bring joy
and satisfaction to many outdoor and indoor RC pilots around the globe. Along
with the rest of our current JTA Innovations lineup, the Extra JD is constructed
with 6mm EPP and showcases a next-gen carbon fiber construction that has been
tested and approved by many top pilots including former ETOC competitors. In
the air, the Extra JD will provide a stable yet aggressive feel that won’t disappoint
even the most demanding pilots. Characteristics such as a rapid roll rate without
a noticeable amount of drag, insane rudder authority, solid and floaty high alpha
tendencies, smooth tracking, and more are going to set the Extra JD a part. On
the ground, the sleek lines are certainly noticed. The color scheme designed by
Alex Ames matches the attitude of the airplane perfectly. A carbon fiber texture
will be noticed when looking at the black portions of the scheme.
Wingspan- 32” (6mm EPP)
Weight- Approximately 175-195g
Motor- T-Motor AT2303 or 2304 or equivalent
ESC- 10-15amp (T-Motor AT12A available at JTA)
Servos- 7g-12g (Spektrum A3030, MKS HV6100, EMax ES08, JR E397, etc.)
Prop- 8”-9” (8” for 3S setup, 9” for 2S setup)
Battery- 350-800mah 2S or 3S depending on motor/ESC combo max cell
capabilities
www.modellmarkt24.ch

www.modellmarkt24.ch
Kit contents shown above
Below are lengths of control surface linkages. Linkages are
used from the provided carbon fiber rods.
Aileron linkages: 65mm (x2)
Elevator linkage: 365mm (x1)
Rudder linkage: 365mm (x1)
www.modellmarkt24.ch

www.modellmarkt24.ch
*N/A indicated where carbon fiber is not needed
www.modellmarkt24.ch

www.modellmarkt24.ch
*Carbon rod wing trusses to support the lower fuse to the
wings are 310mm (x4)*
www.modellmarkt24.ch

www.modellmarkt24.ch
As shown above, the aileron bracing is done using flat
carbon fiber glued into the slots creating durability for the
aileron. Please see the carbon fiber diagram for your
airframe to determine which size carbon strips are to be
used.
www.modellmarkt24.ch

www.modellmarkt24.ch www.modellmarkt24.ch

www.modellmarkt24.ch
Wing bracing shown above. The center wing spar is the
supplied carbon fiber square stock.
Cowl glued to the fuselage.
www.modellmarkt24.ch

www.modellmarkt24.ch
The horizontal piece of the fuselage also uses flat carbon
fiber spanning the entire length from the rear wing spar to
the horizontal stab spar.
www.modellmarkt24.ch

www.modellmarkt24.ch
Elevator flat spar and h-stab flat spar shown above.
Now that rigidity is established, it is very important to break
in the hinges by flexing them all the way over and weighing
them down. Let them rest for at least 60 minutes.
www.modellmarkt24.ch

www.modellmarkt24.ch
You can now prepare the bottom half of the fuselage. Test fit this into each
slot as shown above before glueing.
www.modellmarkt24.ch

www.modellmarkt24.ch
If deciding to place glue on the horizontal part of the fuselage, you can mark
out where the glue will be placed as shown above after test fitting the fuselage.
www.modellmarkt24.ch

www.modellmarkt24.ch
Using the marks that you just made, place your glue along the fuselage.
www.modellmarkt24.ch

www.modellmarkt24.ch
It is extremely important to make sure that the bottom vertical part of the
fuselage stays 90 degrees to the horizontal fuselage while the glue is setting.
This can have a huge effect on the flying characteristics.
www.modellmarkt24.ch

www.modellmarkt24.ch
The provided EPP square may be useful during this process of glueing the
bottom fuselage piece.
www.modellmarkt24.ch

www.modellmarkt24.ch
Now that the bottom fuselage piece is glued into place, you can locate the
carbon fiber rods used for the wing bracing. Shown above is the wing joiner
used to guide the wing bracing. Some airframes may have a larger gusset or
joiner that overlaps the leading edge. You will also find dots towards the tip of
each wing to determine where to glue the carbon rods. The same goes for the
location on the bottom part of the fuselage. There should be four total carbon
rods for wing bracing. Two will be used on each wing. Lengths can be found
on the carbon fiber diagram.
www.modellmarkt24.ch

www.modellmarkt24.ch
Shown above is the wing bracing glued into the bottom part of the fuselage.
www.modellmarkt24.ch

www.modellmarkt24.ch
Just like the aileron bracing, it is very important to use weight towards the
wing tip while the carbon wing bracing is setting up to keep the leading edge
of the wing as straight as possible.
www.modellmarkt24.ch