Hangar 9 RV-8 User manual

Specications
Wingspan: .............................................................. 61 in (1549mm)
Length: ................................................................... 52 in (1321mm)
Wing Area: .........................................................732 sq in ( sq dm)
Weight: ........................................................... 6.5–7 lb (2.9–3.2 kg)
Radio: .................................................. 5-channel with 6–7 servos
Engine: ....... .46–.52 2-stroke, .72–.82 4-stroke, EFL Power 46 EP
RV-8
Assembly Manual
RV-8 is a trademark of Van’s Aircraft and is used with permission.

2 Hangar 9 RV-8 Assembly Manual
Table of Contents
Contents of Kit and Parts Layout ...........................................2
Included Hardware.................................................................3
Using the Manual...................................................................4
UltraCote Covering Colors .....................................................4
Before Starting Assembly ......................................................4
Radio Systems Requirements................................................4
Recommended Setup–2-Stroke Glow....................................4
Recommended Setup–4-Stroke Glow....................................4
Recommended Setup–Electric...............................................4
Field Equipment Required......................................................4
Optional Field Equipment.......................................................4
Tools and Supplies.................................................................4
Additional Required Adhesives ..............................................5
FS One ...................................................................................5
Important Information Regarding Warranty Information .......5
Section 1: Landing Gear Installation ......................................5
Section 2: Servo and Receiver Installation ............................9
Section 3: Rudder Cable Installation....................................11
Section 4: Elevator/Stabilizer Installation.............................14
Section 5: 2-Stroke Engine Installation................................18
Section 6: 4-Stroke Engine Installation................................20
Section 7: Fuel Tank Installation and
Throttle Linkage Connection ..........................................22
Section 8: Electric Motor Installation...................................25
Section 9: Cowling and Spinner Installation ........................29
Section 10: Canopy and Pilot Installation ............................31
Section 11: Aileron and Flap Servo Installation ...................32
Section 12: Wing and Canopy Hatch installation .................37
Section 13: Center of Gravity...............................................39
Section 14: Control Throws .................................................39
Section 15: Flight Preparations............................................40
Section 16: Maintaining Your Model....................................40
Section 17: Safety Do’s and Don’ts for Pilots ......................41
Section 18: Daily Flight Checks............................................41
Section 19: Glossary of Terms.............................................42
Section 20: Safety, Precautions and Warnings ....................42
Section 21: Warranty Information........................................43
Instructions for Disposal of WEEE by
Users in the European Union.........................................44
2009 Official Academy of
Model Aeronautics Safety Code.....................................45
Engine Mounting Template ..................................................47
Air Exit Template (EP)..........................................................47
Large Replacement Parts
1. HAN4841 Fuselage with Hatch
2. HAN4842 Fuselage Hatch
3. HAN4843 Left Wing Panel
4. HAN4844 Right Wing Panel
5. HAN4845 Stabilizer (left and right)
6. HAN4846 Canopy
7. HAN4847 Cowl
8. HAN4848 Aluminum Landing Gear Legs
9. HAN4849 Aluminum Anodized Wing Tube
10. HAN4850 Aluminum Anodized Stabilizer
Tube Set
11. HAN4851 Wheel Pants (left and right)
12. HAN4852 21/2-inch Foam Wheels
13. HAN4855 Glow Fuel Tank, 8.8 oz (260cc)
14. HAN4858 Pushrods
Small Replacement Parts (not shown)
HAN4853 Engine Mount with Hardware
HAN4854 45mm EP Motor Mount with Hardware
HAN4856 Nylon Pushrod Connectors
HAN4857 Pull-Pull Rudder Hardware
HAN4859 Servo Mounting Blocks
HAN4848A Landing Gear Axles
Contents of Kit and Parts Layout
1
2
4
3
5
6
7
8
9
10
11
12 14
13

WING
Left wing with aileron and flap 1
Right wing with aileron and flap 1
Clevis 4 aileron & flaps
Pushrod keeper 4 aileron & flaps
2mm x 10mm self-tapping screw 16 ail & flap servo cover
19mm x 19mm x 10mm wood block 8 hard point for ail & flap servos
2mm x 180mm pushrod threaded one end 4 aileron/flap pushrods
3mm x 20mm socket head cap screw 2 wing mounting
3mm flat washer 2 wing mounting
20mm x 480mm aluminum wing tube 1 wing mounting
4mm x 270mm aluminum stab tube 1 stab mounting
4mm x 160mm aluminum stab tube 1 stab mounting
LANDING GEAR
Right side white aluminum landing gear 1
Left side white aluminum landing gear 1
21/2-inch (63mm) wheel 2
Wheel pants, white 2
3mm x 10mm screw 2 wheel pant to landing gear
3mm blind nut 2 wheel pant
4mm wheel collar with setscrew 4 wheels
5mm hex head machine screw and wheel axle 2 wheel axle
5mm hex nut 2 axle to the landing gear
3mm x 12mm socket head cap screw 6 landing gear to fuselage
3mm flat washer 6 landing gear to fuselage
FUSELAGE
Fuselage with canopy hatch 1
Canopy 1
Fuel tank, assembled 1
3mm x 15mm socket head cap screw 6 cowl & canopy hatch
3mm flat washer 6 cowl & canopy hatch
4-40 x 1-inch socket head cap screw 4 engine to engine mount
4-40 lock nut 4 engine to engine mount
#4 flat washer 4 engine mount
Small nylon motor mount 2 2 & 4 stroke engine
EP 42mm aluminum standoff 4 electric motor
8-32 blind nut 4 engine mount to firewall
8-32 x 3/4-inch socket head cap screw 8 glow and EP mount
#8 flat washer 4 engine mount to firewall
Nylon throttle linkage housing 1
Fuel tank support (wood) 1
2mm x 400mm pushrod with z-bend 1 throttle linkage
RUDDER, AND ELEVATORS
Right stabilizer with elevator 1
Left stabilizer with elevator 1
Clevis 4 elevator & rudder (Installed)
Pushrod keeper 1 elevator
Pull-pull wire 1 rudder
Rigging couplers threaded 2 rudder control horn
Aluminum crimps with plastic end 6 rudder (2 extra)
Rigging couplers with z-bend 2 rudder servo arm
2mm x 740mm pushrod threaded one end 2 elevator pushrods
4mm wheel collar 2 elevator
3mm x 3mm setscrew 2 elevator
Included Parts and Hardware

The Spektrum trademark is used with permission
of Bachmann Industries, Inc.
4 Hangar 9 RV-8 Assembly Manual
Using the Manual
This manual is divided into sections to help make assembly
easier to understand, and to provide breaks between each
major section. In addition, check boxes have been placed
next to each step to keep track of each step completed.
Steps with a single box () are performed once, while steps
with two boxes () indicate that the step will require
repeating, such as for a right or left wing panel, two servos,
etc. Remember to take your time and follow the directions.
UltraCote® Covering Colors
• Black HANU874
• White HANU870
• Silver HANU881
• True Red HANU866
Before Starting Assembly
Before beginning the assembly of your model, remove
each part from its bag for inspection. Closely inspect the
fuselage, wing panels, rudder and stabilizer for damage.
If you find any damaged or missing parts, contact the
place of purchase.
If you find any wrinkles in the covering, use a heat gun or
covering iron to remove them. Use caution while working
around areas where the colors overlap to prevent separating
the colors.
HAN100 – Heat Gun
HAN150 – Covering Glove
HAN101 – Sealing Iron
HAN141 – Sealing Iron Sock
Radio Systems Requirements
Spektrum Radio System (recommended)
• DX6i 6-channel radio or greater with receiver
(SPM6600)
• JRPS821 DS821 Digital Sport Servo (7)
(6 required for EP version)
• JSP98110 6-inch Servo Extension (2)
• JSP98020 Y-Harness (2) or JSP98110 6-inch Servo
Extension (4) for receiver to flap and aileron servo
extensions
• Receiver Battery, 2700mAh
• JR Switch, Chargeswitch (JRPA004)
Recommended Setup–2-Stroke Glow
• Evolution® .46NX with Muffler (EVOE0460)
• Evolution Propeller 11 x 5 (EVO11050) to
11 x 6 (EVO11060)
• 2 3/4-inch Spinner (DUB290)
• Hangar 9 Fuel Filler Dot (Optional) (HAN115)
• Exhaust Diverter (DUB697) (optional)
• Pilot (not included) (HAN9119 or HAN9120)
Recommended Setup–4-Stroke Glow
• Saito™.82 AAC with Muffler (SAIE082A or SAIE082AGK)
• Evolution Propeller 13 x 8 (EVO13080) or
14 x 6 (EVO14060)
• 2 3/4-inch Spinner (DUB290)
• Hangar 9 Fuel Filler Dot (Optional) (HAN115)
• Exhaust Diverter (DUB697) (optional)
• Pilot (not included) (HAN9119 or HAN9120)
Recommended Setup–Electric
• E-flite®Power 46 BL Outrunner Motor (EFLM4046A)
• 60-Amp Pro Switch-Mode BEC Brushless ESC
(EFLA1060)
• Thunder Power 4S 3850–4500mAh LiPo battery pack
• APC Propeller 13x6.5-inch (APC13065E) to
14x7 (APC14070E)
• 2 3/4-inch Spinner (DUB290)
• JSP98030 12-inch Servo Extension
• Pilot (not included) (HAN9119 or HAN9120)
Field Equipment Required
• Fuel (15% recommended)
• Propeller
• Long Reach Glow Plug Wrench (HAN2510)
• Metered Glow Driver withNi-Cd & Charger (HAN7101)
• 2-Cycle Sport Plug (EVOGP1)
• Manual Fuel Pump (HAN118)
Optional Field Equipment
• Selfstick Weights, 6 oz (HAN3626)
• PowerPro 12V Starter (HAN161)
• 12V 7Ah Sealed Battery (HAN102)
• Power Panel (HAN106)
• Blue Block After Run Oil (EVOX1000)
• Cleaner and towels
Tools and Supplies
Crimping tool Drill
Epoxy brush Felt-tipped pen
Hobby knife with #11 blade Hobby scissors
Hook and loop strap Hook and loop tape
Low-tack tape Medium grit sandpaper
Mixing cup Mixing stick
Paper towel Pencil
Phillips screwdriver: #1, #2 Pin drill
Pliers Razor saw
Rotary tool Cutoff wheel
Rubbing alcohol Ruler
Sanding bar Scissors
Side cutters String
Threadlock Tie wrap
T-pin Trim seal tool
Sanding drum
Foam rubber, 1/4-inch (6mm)
Nut driver or box wrench: 1/4-inch
Box wrench to fit propeller nut
Box end or open end wrench: 10mm (2)
Hex wrench or ball driver: 1.5mm, 2.5mm, 3/32-inch,
9/64-inch
Drill bit: 1/16-inch (1.5mm), 5/64-inch (2mm), 1/8-inch
(3mm), 5/32-inch (4mm), 11/64-inch (4.5mm),
7/32-inch (5.5mm)

5Hangar 9 RV-8 Assembly Manual
Additional Required Adhesives
30-Minute Epoxy (HAN8002)
Canopy Glue (PAAPT56)
Medium CA (PAAPT02)
Thin CA (PAAPT08)
FS One
With FS One®(HANS2008) you get more than photorealistic
fields, gorgeous skies and realistic-looking aircraft. You get
incredibly advanced aerodynamic modeling that simulates
every possible aspect of real-world flight.
The first Hangar Pack®(HANS4010) will add even more
aircraft to FS One. This latest edition includes ten new planes
and helis from your favorite brands, including Hangar 9,
E-flite and Align. You’ll be able to fly aircraft that are only
available on FS One such as the T-REX, Blade CX2, Blade CP
Pro, Hangar 9 P-51 and F-22 PTS. And as always, with the
Hangar Pack, you still get all the same great features that
you did with the original aircraft.
HANS2008 HANS4010
Important Information
Regarding Warranty Information
Please read our Warranty and Liability Limitations section on
Page 40 before building this product. If you as the purchaser
or user are not prepared to accept the liability associated
with the use of this Product, you are advised to return this
Product immediately in new and unused condition to the
place of purchase.
Section 1:
Landing Gear Installation
Required Parts
Fuselage Wheel axle (2)
Wheel pant (right and left) Wheel axle nut (2)
Wheel collar, 4mm (4) 3mm x 3mm setscrew (4)
3mm washer (6) 3mm blind nut (2)
Main landing gear right and left)
3mm x 10mm Phillips head screw (2)
3mm x 12mm socket head screw (6)
Tools and Adhesives
Drill bit: 1/8-inch (3mm) Drill
Trim seal tool Threadlock
Phillips screwdriver: #2
Box end or open end wrench: 10mm (2)
Hobby knife with #11 blade
Hex wrench or ball driver: 1.5mm, 2.5mm
Step 1
Carefully remove the canopy hatch from the fuselage by lifting
it up from the rear. It is secured by magnets at the rear and
dowels at the front. Slide the canopy rearward and set aside.
Step 2
Use a hobby knife with a #11 blade to remove the covering
on the bottom of the fuselage to expose the mounts for the
main landing gear.
Hint: Use a trim seal tool to iron the covering around
the edges of the openings.
Hint: Seal the plywood by applying thin CA to
the exposed plywood after you have sealed the
covering down.
 Step 3
Locate three 3mm x 12mm socket head screws and three
3mm washers. Slide a washer onto each of the screws.

6 Hangar 9 RV-8 Assembly Manual
 Step 4
Apply a drop of threadlock on each of the screws before
using them to secure the main landing gear to the fuselage.
Use a 2.5mm hex wrench to tighten the screws that secure
the landing gear to the fuselage.
Note: There is a right and left landing gear. They cannot
be interchanged or installed incorrectly.
Step 5
Repeat Steps 3 and 4 to install the remaining landing gear.
 Step 6
Slide the wheel axle through the larger hole in the landing
gear.
 Step 7
Slide the wheel pant onto the axle, making sure it is installed
in the correct direction as there is a right and left wheel pant.
Next, slide the wheel axle nut onto the axle. Temporarily
tighten the nut to hold the wheel pant in position.

7Hangar 9 RV-8 Assembly Manual
 Step 8
Position the fuselage on a stand so the wheel pant can be
positioned parallel to the top of the fuselage line.
 Step 9
Use a felt-tipped pen to mark the location for the wheel pant
mounting screw through the hole in the landing gear and on
the wheel pant.
 Step 10
Remove the wheel pant from the landing gear. Use a drill and
1/8-inch (3mm) drill bit to drill a hole at the location marked
in the previous step.
 Step 11
Use pliers to install the 3mm blind nut on the inside of the
wheel pant in the hole just drilled. Apply a drop or two of
thin CA to the blind nut to secure it in the wheel pant. Make
sure not to get CA in the threads.
 Step 12
Place the wheel pant back on the landing gear as described in
Step 6 and 7. Slide a 4mm wheel collar onto the wheel axle,
then slide the wheel into position. Apply a drop of threadlock to
the threads of the wheel axle and tighten the nut to secure the
axle and wheel pant to the landing gear. Use either an adjustable
wrench or 10mm open end wrench to tighten the nuts.

8 Hangar 9 RV-8 Assembly Manual
 Step 13
Apply a drop of threadlock to a 3mm x 3mm setscrew. Slide
the wheel collar up against the nut and use the setscrew to
secure the position of the wheel collar. Use a 1.5mm hex
wrench to tighten the setscrew.
 Step 14
Slide another 4mm wheel collar on the axle. Use a 3mm x
3mm setscrew and 1.5mm hex wrench to secure the wheel
collar after making sure the wheel can rotate freely on the axle.
 Step 15
Use a 3mm x 10mm Phillips head screw to secure the
wheel pant. The screw threads into the blind nut installed
inside the wheel pant. Tighten the screw using a #2 Phillips
screwdriver.
Step 16
Repeat Steps 6 through 15 to install the remaining wheel
and wheel pant.
Hint: Apply a small drop of lightweight oil to help the
wheels to roll smoothly.

9Hangar 9 RV-8 Assembly Manual
Section 2:
Servo and Receiver Installation
Required Parts
Fuselage Switch harness
Receiver battery (glow powered only)
Hook and loop strap (not included)
Y-harness (2) or 6-inch (152mm) servo extension (4)
12-inch (305mm) servo extension (EP version only)
Servo with hardware (2) (3 for glow-powered model)
Tools and Adhesives
Pencil Thin CA
Drill bit: 1/16-inch (1.5mm) Drill
Foam rubber, 1/4-inch (6mm) Phillips screwdriver: #1
Hobby knife with #11 blade
 Step 1
Prepare the rudder and elevator servos by installing the
rubber grommets and brass eyelets as described in the servo
or radio manual.
 Step 2
Use a #1 Phillips screwdriver to thread a servo mounting
screw into the holes in the radio tray for mounting the
servos. Apply a drop or two of thin CA into each hole to
harden the threads made by the screw. This will provide a
much more secure mounting of the servos than if this step
were skipped.
 Step 3
Use a #1 Phillips screwdriver and the screws included with
the servos to secure them in the servo tray.
Step 4
Repeat Steps 1 through 3 to install the throttle servo in the
forward servo tray.
Note: If you are building the EP version it is not
necessary to install the throttle servo.

10 Hangar 9 RV-8 Assembly Manual
Step 5
Use a hobby knife and #11 blade to remove the covering
from the appropriate hole to mount the switch harness.
Provisions have been made for either a larger or smaller
switch in the side of the fuselage.
Note: The installation of the switch is only required
for the installation of a glow motor. If you are building
your model for electric, it is not necessary to mount the
switch in the side of the fuselage.
Step 6
Mount the switch harness in the side of the fuselage using
the hardware provided with the switch.
Step 7
Connect the receiver battery to the switch harness. Use a hook
and loop strap (not included) to secure the receiver battery
underneath the forward radio tray. Use 1/4-inch (6mm) foam
to insulate the battery from the vibrations from the airframe.
Step 8
Plug the leads from the switch harness, rudder, elevator and
throttle servos into the appropriate ports of the receiver. Also
plug extensions or a Y-harness in the receiver for both the
aileron and flap servos.
Step 9
Use a hook and loop strap and 1/4-inch (6mm) foam rubber
(not included) to mount the receiver in the fuselage on the
forward servo tray. Also use hook and loop (not included) to
mount the remote receiver (if necessary) in the fuselage as
shown. It should be as far away from the main receiver as
possible and either higher or lower than the main receiver for
the best operation of your radio system. Make sure to place
a piece of foam between the receiver and strap as shown.

11Hangar 9 RV-8 Assembly Manual
Note: The EP version will require you to mount the
main receiver and remote receiver in the locations
shown in the photos below to allow for the installation
of the motor battery. The receiver is shown with the
pins facing up so the majority of the case is supported
by the former in the fuselage.
Section 3:
Rudder Cable Installation
Required Parts
Fuselage Rudder cable
Cable crimp (4) Clevis (2)
Heat shrink tubing
Pre-bent pull-pull fitting (2)
Tools and Adhesives
Phillips screwdriver: #2 Crimping tool
Hobby knife with #11 blade Side cutters
Scissors Pliers
Pin drill Drill bit: 5/64-inch (2mm)
Step 1
Use a #2 Phillips screwdriver to remove the servo horns
from the rudder and elevator servos.
Step 2
Use a pin drill and 5/64-inch (2mm) drill bit to enlarge the
holes that are 9/16-inch (15mm) from the center of a 180
degree servo arm as shown. Insert the pre-bent pull-pull
fittings in the holes as shown.
Step 3
Insert one end of the cable into the cable crimp as show. The
cable will then go through the hole of the pre-bent pull-pull
fitting then back through the cable crimp. Do not cut the
cable at this time.

12 Hangar 9 RV-8 Assembly Manual
Step 4
Slide the cable crimp close to the fitting, but not so tight that
it touches. Position the cable so a small amount exits the
crimp. Use crimping pliers or pliers and crimp hard to crimp
the cable in position.
Important: Do not let more than 1/4-inch (6mm) of
excess cable exit the crimp.
Step 5
Repeat Steps 3 and 4 to crimp the opposite end of the cable
to the remaining pull-pull fitting.
Step 6
While holding the servo arm, pull the cable so you can find the
center. Use side cutters to cut the cable in two equal pieces.
Step 7
Use the radio system to check the operation of the rudder
and elevator servos. It may be necessary to bind the
transmitter and receiver if you are using a new receiver.
Always select a blank model and reset it to remove any
programming or trim settings when using a computer radio
before starting the linkage installation. Use the screw from
the servo and a #2 Phillips screwdriver to secure the servo
arm on the rudder servo.

13Hangar 9 RV-8 Assembly Manual
Step 8
Slide each of the cables into the tubes inside the fuselage.
The cables will exit the fuselage at the rear. You will need to
use a hobby knife with #11 blade to remove the covering so
the cables can exit.
Hint: Poking the cable a few times will make an
indentation in the covering so the exit can be located.
Step 9
Thread clevis 10-turns on the threaded pull-pull fitting. Use
scissors to cut two 1/4-inch (6mm) long pieces from the
heat shrink provided and slide it onto the clevis. Prepare two
assemblies at this time.
Note: The heat shrink on the clevises will be tightened
after the control throws have been set.
 Step 10
Connect the clevises to the center hole of the rudder
control horns.
 Step 11
Slip the cable through the hole in the fitting. With the
radio system on, center the rudder servo. With the rudder
centered, pull the cable so it has a light amount of tension.
Make a slight bend in the cable as shown. This will help
when installing the crimp in the next steps.
 Step 12
Remove the cable, then slide it through the crimp. The cable
then goes through the fitting and back through the crimp.
Use crimping pliers to secure the crimp to the cable.
Note: It may be necessary to adjust the tension on the
cable from time to time. Simply thread the clevis in or
out at the rudder control horn to keep light tension on
the cable. Always adjust both clevises equally to avoid
changing the rudder trim.
Step 13
Repeat Steps 10 through 12 to connect the opposite cable to
the rudder control horn.

14 Hangar 9 RV-8 Assembly Manual
Section 4:
Elevator/Stabilizer Installation
Required Parts
Fuselage Stabilizer tube (short)
Stabilizer tube (long) Heat shrink
Clevis (2) Transmitter
Wheel collar, 4mm (2) Pushrod keeper
3mm x 3mm setscrew (2)
29-inch (736mm) pushrod wire (2)
Stabilizer assembly (right and left)
Tools and Adhesives
Hobby knife with #11 blade Felt-tipped pen
Rubbing alcohol Paper towel
30-minute epoxy Mixing cup
Mixing stick Low-tack tape
Epoxy brush Scissors
Phillips screwdriver: #2 Side cutters
Rotary tool with cutoff wheel Pliers
Drill bit: 5/64-inch (3mm) Pin drill
Threadlock Hex wrench: 1.5mm
Step 1
Use a hobby knife and #11 blade to remove the covering
for the two stabilizer tubes in the fuselage on both sides
of the fuselage.
 Step 2
Slide the long and short stabilizer tubes into the stabilizer
half. Note the longer tube is in the hole toward the leading
edge of the stabilizer (front) and the shorter tube toward
the elevator (rear).
 Step 3
Slide the tubes into the fuselage. Use a felt-tipped pen to
trace the outline of the stabilizer on the side of the fuselage.
 Step 4
Use a hobby knife with a #11 blade to remove the covering
from the fuselage. Trim 3/32-inch (2mm) inside the lines
drawn when cutting the covering.
Step 5
Repeat Steps 2 through 4 to prepare the opposite side of the
fuselage for the stabilizer.

15Hangar 9 RV-8 Assembly Manual
Hint: Use rubbing alcohol and a paper towel to remove
the lines drawn on the fuselage.
Important: Read through the next few steps before
mixing any epoxy. You must be able to perform these
steps before the epoxy begins to cure.
 Step 6
Mix a small amount of 30-minute epoxy. Brush a thin coat of
epoxy on the exposed wood of the fuselage as well as to the
bare wood of the stabilizer.
 Step 7
Slide the stabilizer into position. Use low-tack tape to keep
the stabilizer tight against the fuselage.
Caution: Make sure to keep the stabilizer
perpendicular to the vertical fin when applying the tape.
It is possible to have too much tension on the top or
bottom and pull the stabilizer out of alignment.
Step 8
Repeat Steps 6 and 7 to install the remaining stabilizer half
before the epoxy begins to cure.
Hint: Use rubbing alcohol and a paper towel to remove
any excess epoxy from the stabilizer and fuselage
before it begins to cure.
Step 9
After the epoxy has fully cured, slide one of the 29-inch
(736mm) pushrod wires, threaded end first, into the elevator
pushrod tube closest to the side of the fuselage. Remove the
covering at the rear of the fuselage using a hobby knife and
#11 blade so the pushrod can exit the fuselage.

16 Hangar 9 RV-8 Assembly Manual
Step 10
Cut a 1/4-inch (6mm) piece from the heat shrink tubing and
slide it over the clevis. Thread the clevis 10-turns on the
pushrod wire. Connect the clevis to the center hole of the
elevator control horn.
Note: The heat shrink on the clevises will be tightened
after the control throws have been set.
Step 11
Use side cutters to remove one arm from a long 180 servo
arm. Secure the arm on the servo using the screw that was
removed previously. Use a #2 Phillips screwdriver to tighten
the screw.
Step 12
Turn on the radio system and center the elevator servo.
With the elevator centered, use a felt-tipped pen to mark the
pushrod wire where it crosses the servo horn.
Step 13
Use pliers to bend the pushrod wire 90 degrees at the mark
made in the previous step.
Step 14
Trim the wire 3/8-inch (10mm) above the bend using side
cutters or a rotary tool.
Step 15
Use a pin drill and 5/64-inch (2mm) drill bit to enlarge the hole
that is 9/16-inch (14mm) from the center of the servo arm.

17Hangar 9 RV-8 Assembly Manual
Step 16
Slide two 4mm wheel collars on the pushrod wire.
Step 17
Insert the wire into the hole in the servo arm. Slide the
pushrod keeper onto the wire, then rotate it and snap it on
the wire to secure the pushrod wire to the servo horn.
Step 18
Repeat Steps 9 and 10 to install the remaining 29-inch
(736mm) pushrod wire.
Step 19
You will need to make two 45-degree bends in the elevator
pushrod so it can be secured to the first pushrod. Make
sure that the bend nearest the pushrod tube is far enough
forward that it will not hit the pushrod tube when operating
the elevator.
Step 20
Use a rotary tool and cut off wheel or side cutters to trim the
pushrod wire so it almost touches the pushrod keeper. Slide
the wheel collars forward. Slide the bent pushrod wire into
the wheel collars.
Step 21
Use two 3mm x 3mm setscrews and a 1.5mm hex wrench to
secure the collars that link the two pushrods together. Make
absolute sure to use threadlock on these screws so they
don’t vibrate loose.

18 Hangar 9 RV-8 Assembly Manual
Section 5:
2-Stroke Engine Installation
Required Parts
Fuselage Engine mounting template
#8 washer (4) 8-32 blind nut (4)
4-40 locknut (4) #4 washer (4)
Engine
4-40 x 1-inch socket head screw (4)
Throttle pushrod, 16-inch (406mm)
Throttle pushrod tube, 8-inch (203mm)
8-32 x 3/4-inch socket head screw (4)
Tools and Adhesives
Drill Low-tack tape
Phillips screwdriver: #1 Ruler
Medium grit sandpaper Side cutters
Medium CA Threadlock
30-minute epoxy
Hex wrench or ball driver: 3/32-inch, 9/64-inch
Nut driver or box wrench: 1/4-inch
Drill bit: 1/16-inch (1.5mm), 5/32-inch (4mm),
7/32-inch (5.5mm)
Step 1
Cut the engine mounting template from Page 47 of the
manual or use the supplied plywood template. Use low-tack
tape to attach it to the front of the firewall as shown.
Step 2
Use a drill and 1/16-inch (1.5mm) drill bit to drill the
appropriate holes for your particular motor. The throttle
pushrod locations are also located on the template for both
Saito and Evolution engines.
Hint: Use a #1 Phillips screwdriver or center punch to
make an indentation in the firewall so the drill bit does
not wander when drilling the holes.
Step 3
Use a drill and 7/32-inch (5.5mm) drill bit to enlarge the four
holes used to mount the motor mount to the firewall. Use a
drill and 5/32-inch (4mm) drill bit to enlarge the hole for the
pushrod tube.
Step 4
Use a drill and 5/32-inch (4mm) drill bit to drill a hole
3/4-inch up and centered in the plywood as shown.
Step 5
Use medium grit sandpaper to roughen the last 11/4-inch
(32mm) on both ends of outside of the 8-inch (203mm)
throttle pushrod tube. Insert the tube through the two holes
so 1-inch (25mm) of the tube extends past the former
toward the servo as shown. Use medium CA to glue the tube
to the former and firewall.

19Hangar 9 RV-8 Assembly Manual
Step 6
Use a 9/64-inch hex wrench and one of the 8-32 x 3/4-inch
socket head screws and a #8 washer to draw the four 8-32
blind nuts into the backside of the firewall. Note that the
barbs on the blind nuts face the wood and keep the blind
nuts from rotating or falling out.
Hint: Apply a couple drops of medium CA to the barbs
of the blind hut before installing. This will help to keep
the blind nut secure should you ever need to remove
the screw.
Step 7
Attach the motor mounts to the firewall using four 8-32 x
3/4-inch socket head screws and four 8-32 washers. Use
a 9/64-inch hex wrench to lightly tighten the screws. You
should be able to move the mounts so their position can
be fine-tuned for your particular engine. Apply a drop of
threadlock on each of the screws to prevent them from
vibrating loose.
Step 8
Connect the Z-bend on the 16-inch (406mm) pushrod to the
carburetor as shown.
Step 9
Use the holes in the engine mount that will position the drive
washer of the engine 43/8inches (111mm) from the firewall
as shown. Tighten the screws that attach the mount to the
firewall after making sure they have threadlock on them to
keep them from vibrating loose.
Step 10
Slide the pushrod into the pushrod tube. Position the
engine between the mounts, then secure its position using
four 4-40 x 1-inch socket head screws, four #4 washers
and four 4-40 locknuts. Place the washers on the bottom
side of the mount between the mount and lock nuts. Use
a 1/4-inch nut driver or box wrench to hold the locknuts
while tightening the socket head screws with a 3/32-inch
hex wrench or ball driver.

20 Hangar 9 RV-8 Assembly Manual
Section 6:
4-Stroke Engine Installation
Required Parts
Fuselage Engine mounting template
#8 washer (4) 8-32 blind nut (4)
4-40 locknut (4) #4 washer (4)
Engine
7/16-inch (11mm) 2-stroke spacer (2)
4-40 x 1-inch socket head screw (4)
Throttle pushrod, 16-inch (406mm)
Throttle pushrod tube, 8-inch (203mm)
8-32 x 3/4-inch socket head screw (4)
Tools and Adhesives
Drill Low-tack tape
Phillips screwdriver: #1 Ruler
Medium grit sandpaper Side cutters
Medium CA Threadlock
Rotary tool with sanding drum
Hex wrench or ball driver: 3/32-inch, 9/64-inch
Nut driver or box wrench: 1/4-inch
Drill bit: 1/16-inch (1.5mm), 5/32-inch (4mm),
7/32-inch (5.5mm)
Step 1
Cut the engine mounting template from Page 47 of the
manual or use the supplied plywood template. Use low-tack
tape to attach it to the front of the firewall as shown.
Step 2
Use a drill and 1/16-inch (1.5mm) drill bit to drill the
appropriate holes for your particular motor. The throttle
pushrod locations are also located on the template for both
Saito and Evolution engines.
Hint: Use a Phillips screwdriver or center punch to
make an indentation in the firewall so the drill bit does
not wander when drilling the holes.
Step 3
Use a drill and 7/32-inch (5.5mm) drill bit to enlarge the four
holes used to mount the motor mount to the firewall. Use a
drill and 5/32-inch (4mm) drill bit to enlarge the hole for the
pushrod tube.
Step 4
Use a drill and 5/32-inch (4mm) drill bit to drill a hole 3/4-
inch up and centered in the plywood as shown.
Step 5
Use medium grit sandpaper to roughen the last 11/4-inch
(32mm) on both ends of outside of the 8-inch (203mm)
throttle pushrod tube. Insert the tube through the two holes
so 1-inch (25mm) of the tube extends past the former
toward the servo as shown. Use medium CA to glue the tube
to the former and firewall.