Troy Built Models F86D DOG SABRE User manual

Specifications
Wing Span 60in.
Wing Area 895 sq in.
Flying Weight 15 lb.
Fuselage Length 68 in.
Engine 12lb.-18lb. Thrust Turbine
Recommended Engine Jet Cat P60, KingTech K80
Warning!!! This is not a toy.
The F86D is designed for maximum performance. If you are not
familiar with the operation of turbine powered aircraft please
seek the advice of an experienced modeler. Operating this
model with out prior preparation and experience can cause
injuries.

Before You Begin
1. Read through the instruction manual thoroughly before beginning
construction
2. Check all parts supplied with the kit for defects, and missing parts.
Dry fit all parts that will be glued for proper fit. If any parts are
found to be defective please contact your local dealer or us directly
for assistance.
3. Use proper adhesives for assembly. It is imperative that all glue
joints be very strong for best results and safety.
Adhesives Required:
1. Hysol or 15 min epoxy with micro balloons
2. 30 min epoxy
3. Medium CA
4. Zap-A-Dapa GOO or Automotive Goop
Required Parts for Final Assembly
1. Turbine with 12lb-18lb thrust
2. TX and RX with a minimum of 8 channels
3. 2- Thin wing metal gear servos with a minimum of 65oz torque for
elevators
4. 1- Mini metal gear servo with a minimum of 65 oz of torque for
rudder
5. 4- Standard size metal gear servo with at least 125 oz of torque for
aileronʼs and flaps
6. 1- Mini metal gear servo with a minimum of 65 oz of torque for
steering
7. 1- Mini servo for retract valve
8. Electronic Brake Valve or Mechanical Brake valve
9. UAT
10. Kerosene Fuel tank stoppers and Clunks
11.RX battery with a minimum of 2,200 mah 6v
12.MBA Struts Wheels and Brakes

1.
Locate the plastic hinges with pin and fit into slots that are cut into the wing
panels, trim the slot as necessary. Hinge the ailerons and flaps on each
wing panel using Hysol or 30 min epoxy. (NOTE: If you are using a larger engine,
like the K80, install the flap hinges at the bottom edge of the flap so greater flap throw can be
obtained).
2.
Check the control surfaces on each wing panel and ensure that the glue
has cured and the control surface is secure. Locate the servo openings for
the ailerons and flapʼs and install the servoʼs using wood screws on each
wing. Ensure the servoʼs are facing in the correct direction as per the above
illustration. We recommend Hitec 645MG for the aileron and flaps

3.
Locate 4 composite control horns and cut a slot in each aileron and flap for
the control horn. Use 30 min epoxy or Hysol to secure horn in place and let
cure. Assemble a pushrod using 2 clevisʼs and and secure to the servo.
Pay close attention to have a slop free surface; any excess movement can
cause flutter during high speed flight. For all the pushrods: screw one clevis
on the threaded end, and determine the length of pushrod needed. Cut the
rod and screw the second servo onto the unthreaded end of the rod. Solder
this clevis in place.
4.
Hinge the rudder using 30 min epoxy or hysol and let cure. Check the
control surface after the glue has cured and ensure of a good bond. Locate
the servo opening on the rudder and install the servo using wood screws.
Locate 1 control horn. Cut a slot in the rudder and glue in place using 30
min epoxy or Hysol.

5.
Assemble a pushrod using 2 clevisʼs and and secure to servo. Pay close
attention to have a slop free surface. Any excess movement can cause
flutter during high speed flight.

6.
Locate the servo location in the rudder and glue blocks inside of the rudder
to attach the servo with 90 degree servo mounts ( not supplied ). We
recommend you use a Hitec HS-5245MG. After you complete the above
assembly, drill two holes in the fuselage where the vertical stabilizer
retention pins will fit into. We suggest you use coarse sandpaper and scuff
the surface of the fuselage where you will be glueing this in place. Using
either hysol or 30 min epoxy with micro balloons, glue the vertical stabilizer
to the fuselage.

7.
Locate the two horizontal stabilizer halves and prepare the surfaces to
hinge. Find the plastic hinges with pin and fit into the slots that are cut into
the elevators, trim the slots as necessary. Hinge the elevators on each
panel using Hysol or 30 min epoxy.
8.
The elevator servoʼs are installed just like the ones in the rudder except for
the servo cover, which is held on with clear tape for best utilization of space
in the servo bay. Glue two hard wood blocks and use L brackets (not
supplied) to hold the servo in place. We recommend JR thing wing servoʼs
for the elevator but you can use any thing wing servo that is metal geared
and has at least 65 oz of torque.

9.
We now have to glue the two horizontal stabilizers to the fuselage. Locate
the two carbon fiber spars for the horizontal stabilizer and test fit them into
the fuselage. DO NOT change the hole location, it is critical due to precise
stab incidents. Make sure you scuff the paint on the surface you are going
to glue to get a good bond. Using Hysol or 30 min epoxy with micro
balloons glue the stabilizer to the fuselage.
10.
Turn the fuselage up side down and glue the small tail former in place with
hysol or 30 min epoxy with micro ballons, please see picture below for a
detailed description. At this time check that the main former in the tail is
completely secure. We suggest you use Hysol or 30 min epoxy to fill in any
gaps that we might have missed at the factory. It is very important that this
area of the fuselage is strong and properly glued to avoid any structural
failure in flight. So take your time and check this area carefully.

11.
Before installing the turbine run all wires from the tail along the top of the
fuselage. Use either aluminum tape or heat shield to guard the wires from
the heat. Slide the dual walled exhaust pipe into the fuselage. Trim the
rear of the fuselage (primarily on the bottom) to allow the thrust pipe to exit
the fuselage with only a small gap all around. Locate the thrust pipe former
and glue in place. The exact location of the installation of this former varies
depending of the turbine used. We suggest you use the instructions from
your specific turbine manufacturer for proper installation of your turbine.
We usually use about 1/2 inch gap from the end of the turbine exhaust to
the beginning of the bell mouth on the thrust pipe.

After you have test fit the turbine and the thrust pipe glue the ply former in
place with Hysol or 30 min epoxy with micro balloons and use two sheet
metal screws to affix the thrust pipe to the former.
12. The wings are held in place by two bolts, one in each wing. You will
have to drill the hole in the fuselage to accommodate the bolt. The bolt
hole will be approximately 1 inch in front of the fuel tanks. You will have to
install two carbon fiber anti-rotation pins on each wing (supplied). One in
the leading edge and one in the trailing edge wing root. When drilling the
holes in the fuselage ensure the wings are at the correct incidence. With
the fuselage level the stabilizer will be 0 degrees incidence and the wings
will be approximately 1-1 1/2 degrees positive incidence
13. The two fuel tanks that come with the kit have to be assembled. After
you complete the assembly of the clunk, tubing etc. Secure the tanks to the
fuselage sides with a drop of goop. Do not use to much glue only a small
amount is necessary in case you need to remove them later.
14. We recommend you install the UAT on the right side of the airplane
looking back. If you look at the picture below you can see the UAT is on
the right side in front of the steering servo. Use goop to glue it to the
fuselage side.

15. Install a mini-servo for steering, we recommend a Hitec HS225MG.
Locate the supplied pull-pull cable and install the steering cables as per the
retract instructions supplied with the kit. Do not over tighten the cables
since this will cause the nose gear to have problems locking in the down
position. Using a Dremel sand any excess fiberglass causing interference
with the pull-pull operation. The two triangles from the picture above
(A and B) are glued in front of the nose wheel steering servo former for
support.
16. Locate the supplied retract valve and install it as per the picture below.
We suggest a Hitec HS225 for operation. We recommend the airpower
single stage electronic brake valve for brake actuation of the brakes. You
can see the mounting location to the left of the servo in the picture below.
This brake valve can be purchased directly from us.

17.
Installation of the hatch and canopy is very simple and should not be made
harder than it is. Find the supplied hatch latch and glue it to the fiberglass
hatch from the inside. Drill a small hole in the fuselage for the hatch latch
pin to fit into. There is no need for extra support since this area was made
thicker for this specific reason. Locate the small carbon fiber pin and attach
it to the front of the hatch and drill a hole in the fuselage for this to fit into.
Please look at the pictures below for clarification
The plastic canopy then is glued to the fiberglass hatch with canopy glue or
goop. You can make the cockpit as detailed as you want at this point.

18. The drop tanks are held in place with two screws in each drop tank.
Use two 3mm pan head screws and screw them into the blind nuts in
the drop tank. The distance of how far you need to screw them in varies
depending on installation, so do not fully secure them yet.
Now locate two holeʼs in each wing panel for the drop tanks. You can
easily find them because we have made a small hole in the covering where
these are located. If you have a hard time finding these holes you can
locate them by the diagram below

19. Underneath these holes there are needed supports for the drop tanks.
Cut a small square away and place either carbon fiber or hard wood and
glue it in place.

20. Control Throws and CG
Ailerons- 15mm up
15mm down measured at wing tip
Elevator- 26mm up
26mm down measured at the root
Rudder- 30mm left
30mm right
Flaps- 25mm down for take-off
45mm down for landing measured at wing root
Crow- 12mm up on each Aileron with landing flaps measured at wing tip.
( 4mm down Elevator mix )
These flap positionʼs have been thoroughly tested, increasing these throws
will not slow down the model or make the landing distance shorter.
Increasing landing flaps will cause the airplane to have unfavorable stall
characteristics.
CG Location- 290mm back from the leading edge measured at the wing
root.
***** All CG measurements are done with a full UAT and Gear Down*****
We also used a gyro on the rudder to aid in the dutch roll tendencies all
F86ʼs exhibit. There is no need for an expensive gyro or servo. We used
the Hitec HS 5245 MG for the rudder servo and the Futaba GY190 micro
piezo gyro. When setting the GY190 we recommend using 25% as a good
starting point and then fine tune after your first flight.

FIRST FLIGHT
If this is your first turbine powered model we suggest you seek the help of
an experienced RC Jet Pilot for the maiden flight of your model. Before
starting the turbine, ensure you have all safety equipment in place incase of
a fire or other problem.
We suggest you do not use take-off flaps on the first flight. The control
throws for the airplane are a starting point and can be changed for your
desired flight needs. On our flight testing we used about 15% expo on
elevator and ailerons. After you get the airplane trimmed we suggest you
extended flaps and slow the airplane down to landing speed. On landing do
not force the airplane down, just decrease power to idle and hold the
airplane off until it gently touches down. Happy Flying!!