AeroWorks 50cc Pitts Python ARF-QB User manual

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50cc Pitts Python ARF-QB
(Quick Build)
ASSEMBLY MANUAL
AEROWORKS™
401 Laredo Unit “D”, Aurora, CO. 80011 - Phone [phone] - Fax [phone]
E-mail - [email protected]
2007 - Copy write Protected – All Rights Reserved by Aeroworks Inc.

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TABLE OF CONTENTS
Page
Aeroworks Contact Information ………………………………………………………………. 3
Introduction ……………………………………………………………………………………... 4
Kit Contents……………………………………………………………………………………… 5
Items Needed To Complete ……………………………………………………………………... 8
Tightening and Re-shrinking The Covering ………………………………………………….. 9
Check Seams and Overlaps for Good Seal ……………………………………………………. 10
Wing Assembly………………………………………………………………….……………….. 11
Stab and Fin Assembly………………………………………………………………………….. 15
Elevator and Rudder Assembly………………………………………………………………… 19
Tail Wire Assembly …………………………………………………………………………….. 29
Main Landing Gear and Wheel Pant Assembly ……..……………………………………….. 32
Tail Wheel Assembly …………………………………………………………………………… 35
Inner Cabane and Outer Strut Installation …………………………………………………… 39
Cowl Preparation ………………………………………………………………………………. 45
Engine, Muffler, Throttle and Choke Installation ……………………………………………. 46
Ignition module Installation …………………………………………………………………… 54
Fuel Tank Installation………………..………………………………………………………….. 55
Radio Installation ………………………………………………………………………………... 63
Cowl Installation …………………………………………………………………………………. 67
Dummy Radial Baffling Installation ……………………………………………………………. 73
Decal Installation ………………………………………………………………………………... 77
Dash Panel and Pilot Installation ………………………………………………………………. 82
Preflight Preparation ……………………………………………………………………………. 83
Center of Gravity (C.G.) …………………..…………………………………………… 86
Control Throws ………………………………………………………………………….. 87

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™
401 Laredo Unit D
Aurora, CO 80011
Phone: [phone]
Fax: [phone]
Website: www.aero-works.net
E-mail: [email protected]
Thank you for choosing the Aeroworks 50cc Pitts Python ARF-QB. We put great
effort into making this plane the best model you will ever build and fly. We have pro-
vided you with the highest quality kit and performance possible. We wish you great
success in the assembly and flying of your new Aeroworks50cc Pitts Python ARF-QB.
!WARNING!
An R/C aircraft is not a toy! 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. Follow all manufacturer instructions included with your plane, radio,
servo’s, batteries and engine.
Aeroworks manufacturing guarantees this kit to be free from defects in both material
and workmanship at the date of purchase. This limited warranty does not cover any
component parts damaged by use or modification. In no case shall Aeroworks liability
exceed the original cost of the purchased kit. Further, Aeroworks reserves the right to
change or modify this limited warranty without notice.
In that Aeroworks has no control over the final assembly or materials used for final as-
sembly, No liability shall be assumed nor accepted for any damage resulting from the
use by the user of the final user-assembled product. By the act of using the user-
assembled product, the user accepts all resulting liability.
We, as the kit manufacturer, have provided you with a top quality, thoroughly tested
kit and instructions, but ultimately the quality and fly ability of your finished model
depends on how you build it; therefore, we cannot in any way guarantee the perform-
ance of your completed model, and no representations are expresses or implied as to
the performance or safety of your completed model.

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INTRODUCTION
Your new 50cc Pitts Python ARF-QB is a highly aerobatic airplane. It is capable of both pre-
cision and 3-D maneuvers. The aircraft builds easily, quickly, and precisely due to its state
of the art CAD design, LASER cut technology, and high quality included hardware. We hope
you enjoy building and flying your 50cc Pitts Python ARF-QB.
Great care has been taken in both the design and manufacturing of the 50cc Pitts Python
ARF-QB to allow for the strongest and lightest construction possible. Only the highest qual-
ity materials from the covering, paint, wood and hardware have been used in the construction
of this model.
The 50cc Pitts Python ARF-QB has been individually hand built, covered and painted by
trained and experienced craftsmen with over 25 years of manufacturing experience. Using
CAD design, laser cut technology and jig-built assures accuracy in all stages of production.
The 50cc Pitts Python ARF-QB is designed for gas engines in the 50cc category. The DA-
50cc engine is shown in the assembly instructions. The aircraft was tested with the DA-50cc
and has outstanding performance. The final choice of engine is left up to the builder. A
computer radio is recommended to allow the pilot to take advantage of the full capabilities of
this aerobatic aircraft.
IMPORTANT Please read through this manual carefully, before starting the assembly of
your new 50cc Pitts Python ARF-QB . Inventory and inspect all parts and hardware for any
imperfections or damage. Notify Aeroworks immediately if there are missing or dam-
aged parts. INTENDED USE
This plane should not be regarded as a toy. This is an aerobatic plane and is recommended for pilots
who are beyond the trainer-stage and are comfortable with flying an aerobatic sport plane.
READ LIMITED WARRANTY READ
It is important to notify Aeroworks of any damage or problems with the model within 30
days of receiving your airplane to be covered under warranty. If you wish to return this air-
craft for any reason a 15% restock fee will be charged to the customer. In addition the cus-
tomer is responsible for all return shipping cost and all prior shipping cost will not be re-
funded. Parts will be exchanged or replaced once the original item is returned at the owner’s
expense. If you have any problems, please contact Aeroworks.
Aeroworks cannot insure the skill of the modeler and can not influence the builder during the
construction or use of this aircraft, and therefore, will not be accountable for any property
damage, bodily injury or death caused by this aircraft.
Aeroworks cannot insure the skill of the modeler and can not influence the builder during the
construction or use of this aircraft, and therefore,
The purchaser/operator accepts all responsibility of any and all structural or
mechanical failures.

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KIT CONTENTS
50cc Pitts Python ARF-QB
Materials List
Basic Aircraft Parts
Fuselage – covered, firewall installed and fuel-proofed:
(2) 1/4” blind nuts installed for the bottom wing
mounting
(8) 6-32 blind nuts installed for the inner cabane
mounting
(4) 4-40 blind nuts installed for the cowling
mounting
(1) L=850mm Antenna Tube installed
(2) L=70mm Pull-Pull cable exist tubes installed
(1) Pilot holes pre-drilled for tail wheel assembly
(1) Top hatch cover for the engine box with AW
logo installed by (4) T2.6x8mm PWA screws
(1) Hatch cover for the landing gear installed by
(2) T2.6x12mm PWA screws
(1) Tinted Canopy installed on the fuse by (11)
T2.6x8mm PWA screws
Top Wing with Aileron – pre-glued at factory, covered:
(8) 6-32 blind nuts installed for the Outer and Inner
struts mounting.
(14) pin point hinges glued
(2)Aileron servo string installed
(2) Pilot holes pre drilled for control horns mounting
Bottom Wing with Aileron and belly pan– pre-glued at
factory, covered:
(4) 6-32 blind nuts installed for the Outer struts
mounting.
(14) pin point hinges glued
(2) Aileron servo string installed
(2) Pilot holes pre drilled for control horns mounting
Horizontal Stabilizer with elevator assembly with (10)
pin point hinges (not glued)---covered
(2) Pilot holes pre drilled for control horns mounting

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Vertical Fin with Rudder with (7) pin point hinges (not
glued) – covered
(2) Pilot holes pre drilled for control horns mounting
SUB ASSEMBLIES
#1:
(1) Fiberglass Cowling—painted with (4) screw holes
(4) 4-40x14mm hex style bolts for mounting of the
cowling
(4) #6 bonded washers for mounting of the cowling
(4) Φ3mm split ring lock washers for the mounting of
the cowling
#2:
(1) 5mm 7075 Aluminum Main Landing Gear -- painted
(2) 5mm dia. x 45mm AL Axle
(2) M8 lock nuts
(4) 5mm i.d. Wheel Collars with set-screws
(2) 83mm Dia. Main Wheels (Lite Type)
(4) 4-40x14mm hex style bolts for mounting wheel
pants
(4) Φ3mm flat washer for mounting wheel pants
(4) Φ3mm split ring lock washer for mounting wheel
pants
(4) 8-32x25mm hex head bolts for mounting main
landing gear
(4) Φ4mm flat washers for mounting main landing gear
#3:
(2) Wheel Pants—1 Left and 1 Right---Painted
(4) 4-40 blind nuts installed on the wheel pants,
2 per side.
#4:
(1) Tail Wheel Assembly – Medium with solid
rubber wheel
#5:
(4) 3mm Aluminum Inner cabane painted and marked
with RF, RR, LF, LR.
(12) 6-32x15mm Hex style head bolts for the inner
struts mounting
(8) 3.5mm flat washers for the mounting of inner
struts (fuse)
(4) #6 bonded washers for the inner struts (top wing)
(2) Outer Struts – Left and Right, covered, marked with
BR, BL (bottom right, bottom left)
(8) 6-32x15mm hex head bolts for the Outer struts
mounting
(8) 6-32 lock nuts for the Outer struts mounting
(8) 3.5mm flat washers for the mounting of the outer
cabane
(8) 2mm L bracket, steel, Outer struts fittings - painted
(8) 6-32x10mm hex head bolts for the L Steel Outer
struts fittings
(8) 3.5mm flat washers for the mounting of the
outer cabane
(2) 1/4 - 20 x 2” Nylon Bolts for the bottom wing
mounting
#6:
(4) 4-40 3” two end threaded pushrod with nuts and
clevises for ailerons
(2) 4-40 4” two end threaded pushrod with nuts and
clevises for elevators.
(2) 4-40x300mm Threaded pushrod - Throttle / Choke
(2) 4-40 solder couplers
(8) Brass spacers – 4 for ailerons; 2 for elevators; 1 for
throttle; 1 for choke
(14) 4-40 Ball Links – 8 for ailerons; 4 for elevators; 1
for throttle; 1 for choke
(14) 4-40x16mm hex style bolts
(14) 4-40 lock nuts
#7:
(2) 1x1000mm plastic coated pull-pull steel cable.
(4) 4-40 Metal R/C links with metal clevises and nuts
(4) 3.5x4mm brass pull-pull swaging tubes
(8) Double control horns
(24) T2.6x12mm Phillips head mounting screws for the
aileron control horns
(12) T2.6x10mm Phillips head mounting screws for the
elevator control horns
(6) M2.5x16mm Phillips head bolts for the rudder
control horns
(6) M2.5 hex nuts for the rudder control horns
(2) Brass spacer - Rudder linkage
(4) 4-40 Ball Links - Rudder
(4) 4-40x16mm hex style bolts
(4) 4-40 lock nuts
#8:
(1) 750cc (26 ounce) Gas Fuel Tank assembly
(1) 450cc (16 ounce) Smoke Fuel Tank assembly
(1) 4ft. large gas fuel line
(4) Brass barbs for fuel tank
#9: (2) Throttle servo trays
(2) Engine mounting template (DA, 3W)
(1) 140x70x6mm foam for the Fuel tank
(1) 160x70x6mm foam for the Fuel tank
(2) 300x80x6mm sponge for the receiver and battery
(8) 8x450mm Nylon Ties for the fuel tank mounting
(10) 3x150mm Small Nylon ties for the fuel line
(4) 356x12.5mm Velcro - One Wrap Straps
(1) paper degree meter for the rudder
(1) Radial dummy engine with no cut outs for the air
inlet- painted
(1) Balsa wood dummy engine alignment jig
(1) Card Stock (8-1/2”x12”) for making of the tem-
plate for cutting of cowling
(1) Custom Throw Meter

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#10:
(24) 6.35mm aluminum engine stand offs.
#11: Tail Section flying wires - Pre-made
(4) 0.6x350mm plastic coated steel cable
(4) 0.6x260mm plastic coated steel cable
(8) Right hand threads Rods – R1&R3
(8) Left hand thread Rods – L2&L4
(6) M3x20mm Phillip head bolts
(6) M3 Hex nuts
(4) T2.6x10mm PWA screws
(16) Φ2.5x4mm brass pull-pull swaging tubes
#11:
(1) 300x300mm True Red Covering
(1) 300x300mm White Covering
(1) 300x300mm Midnight Blue Covering
(2) 20x1800mm Transparent Covering for the
sealing of the hinge gap
#12: Vinyl Decal Set
#13: Manual CD / with high resolution picture folder

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Hardware:
ITEMS NEEDED TO COMPLETE
• 50 CC Gas engine and ignition
• Pitts style muffler
• Engine mounting bolts, lock nuts, and washers.
• 3 1/2” Spinner and propeller of choice
• 4 x aileron servos (min 180 in./oz. Torque,
Digital, Metal geared) Rec. HS5985-MG
• 1 x rudder servo (min 180 in./oz. Torque,
Digital, Metal geared) Rec. HS5985-MG
• 2 x elevator servos (min 180 in./oz. Torque,
Digital, Metal geared) Rec. HS5985-MG
• 1 x throttle servo (Fast / Reliable)
• 1 x choke servo (Fast / Reliable) optional
• Servo extensions 9 x 6,” 2 x 24,” 2 x 11” Y’s
• 1 x 8 channel receiver ( PCM recommended)
• 1 x receiver battery (min 6.0 volt / 1700ma)
• 1 x ignition battery (min 4.8 volt / 1700ma)
• 2 x switches with charge jacks
Tools:
• Allen wrenches US and Metric.
• Dremel cutting disc and sanding drum tool
• Electric drill and selection of bits
• Razor saw
• Flat head screwdriver
• Hobby heat gun
• Hobby iron and covering sock
• Masking tape
• Modeling knife
• Needle nose pliers or crimping tool
• Paper towels
• Pen, pencil or felt tipped marker
• Phillips screwdriver
• Rubbing alcohol
• Ruler and tape measure
• Scissors
• T pins
• Waxed paper
• Wire Cutters
Adhesives:
• 15-30 Minute epoxy
• Blue Loctite
• Epoxy mixing cups, mixing sticks, brushes
• CA kicker (optional)
• Thick, Thin and Medium CA
• Rubbing alcohol
• Wipes
WARNING
Some rubbing alcohols
may attack painted parts.

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1. Open your kit slowly and take care not to dam-
age any parts of the kit. Remove all parts from
their plastic protective covers for inspection.
Before doing any assembly or installation of any
decals it is very important to re-shrink or re-
tighten the already applied covering. Due to the
shipping process, heat and humidity changes
from different climates, the covering may be-
come lose and wrinkle in the sun. If you take the
time to re-tighten the covering, you will be re-
warded with a long lasting beautifully covered
model.
TIGHTENINGAND RE-SHRINKING THE COVERING
2. Using your covering iron with a soft sock, gently
apply pressure and rub in the covering. If any
bubbles occur, your iron may be to hot. Reduce
heat and work slowly.
3. If bubbles persist, use a small pin to punch holes
in the bubble to relieve trapped air and reheat.
4. Use your heat gun with extreme caution. Take
care not to apply too much heat to one area for
long periods of time. This may cause the trim
colors to over shrink and pull away leaving un-
sightly gaps on the color lines. The trim stripes
are especially vulnerable to over shrinking.
5. You model is covered with Ultracote™ cover-
ing. In case of repairs, the colors are:
Midnight Blue #885
Silver #881
True Red #866
White #870
Tightening and re-shrinking the covering is a
never ending process and needs to be checked
after each flying secession.

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1. Go over all seams and color overlaps with
your sealing iron.
Note: Even if your models covering has no
wrinkles out of the box it is still very important
to go over all seams and overlaps to make cer-
tain they are sealed securely. This is espe-
cially important at the leading edges of the
wings and stabs. We recommend checking
the covering after each flying session.
CHECKING SEAMS AND COLOR OVERLAPS FOR GOOD SEAL
2. Use your covering iron to ensure all edges,
seams, and color overlaps are securely sealed.
3. This is an optional step but is recommended.
Cut strips of the supplied clear covering to fit
the hinge gaps. Use covering iron to seal the
clear covering snugly into the bottom of the
hinge lines as shown for air tight hinge seals.
IMPORTANT:
It is the users responsibility to check the
covering seams and overlaps for security
and a good seal. Aeroworks is not re-
sponsible for failure of covering seams or
overlaps during flight.
This is a never ending process that
must be done after each flying
secession. Due to varying tempera-
tures and humidity changes from
day to day the covering will
continue to loosen and must be
maintained.

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Aileron Servo Installation
1. Gather the aileron servos, pushrods, control
horns, mounting screws and 4-40 ball links as
shown below.
Note: The ailerons have been pre-hinged and glued
to the wing panels and are ready for flight. No
other steps are necessary for hinging.
Note: We have supplied clear covering for sealing
the hinge gaps. This is an optional step but is
recommended
WINGASSEMBLY
2. Layout the servo and extension on the wing to
test fit the installation and ensure servo lead is
the correct length.
Note: 180 in. oz. digital, metal geared servos are
recommended. Servo selection can be the difference
between a great flying model and a model that will
crash. Always use brand name high quality servos.
3. Attach the 6” extension to the servo lead and
secure with safety wire, string, tape, or other
method. Ensure the plugs will not come apart
from vibration or light tension.
4. Fasten the pull string from the servo hole to
the male plug of the servo extension.

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5. Secure with tape so that the string pulls from
the front end of the plug. Taper the tape to
avoid hang-ups inside the wing.
6. Pull servo extension through wing and pro-
vided exit holes in wing panel.
7. Install servo in servo well with the output arm
toward the leading edge of the wing. Drill
holes for servo mounting screws.
8. Install servo with servo mounting screws. Re-
peat servo installation process for all aileron
servos.

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Aileron Control Linkage Installation
1. Gather the aileron control linkage parts as shown
below.
1 pushrod
2 4-40 ball link assemblies
1 brass spacer
1 left and 1 right side control horn
6 wood screws
2. Assemble the pushrod and control horn assem-
bly as shown. The ball link goes between the
left and right sides of the control horn sides and
is secured with a nylon lock nut. Start with the
center hole in the control horn. The ball link
may be moved up or down for more or less con-
trol throw. Brass spacer goes between servo arm
and ball link.
3. Place the control horns over the predrilled
mounting holes.
4. Use a drop of thick CA glue on each screw as
shown.

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5. Securely fasten the control horn to the aileron
with six wood screws as shown.
6. Tape the trailing edge of the aileron to the trail-
ing edge of the wing in the neutral position.
Plug the servo into the receiver and turn radio
on. Ensure the servo trim and sub trim is cen-
tered. Adjust the length of the pushrod so that
the servo arm is parallel to the aileron hinge line
when it is placed on the servo output shaft.
Screw servo arm on the servo output shaft.
Note: On metal geared servos use Loctite for all
Servo arm mounting screws.
7. Ensure the servo does not bind at either end
point at full deflection. A 1” servo arm is rec-
ommended for best results. A 1 1/4” servo
arm is required for full deflection of the aileron
50º bevel.
8. Repeat all the above steps for the other three
ailerons.

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Stabilizer Installation
1. Gather the Stab, Elevators and Hinges.
STABILIZER - FIN ASSEMBLY
2. Mount bottom wing to fuselage. Slide the stab
through the pre cut stab slot at the rear of the
fuselage.
3. Center stab in fuselage
4. Align stab to bottom wing. Ensure all dimen-
sions are equal for both left and right sides.
Note: Ensure the stab is parallel with bottom wing.
Sand fuse stab slot if necessary to achieve
perfect alignment. Work slowly and take
care not to remove to much wood while
sanding.

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5. Make alignment marks on stab for easy re-
alignment during the gluing process.
6. Glue stab into fuselage. Be certain to put glue
onto both the top and bottom sides of the stab.
Note: Use 30 minute Epoxy to allow adequate
drying / working time. Remove any excess
glue with alcohol wetted wipes.
7. Double check all measurements are equal and
stab is properly positioned before glue dries.
8. Double check all measurements are equal and
stab is properly positioned before glue dries.

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Fin Installation
1. Gather the Fin, Rudder and Hinges.
2. Mark cut lines on the covering were the bottom
of fin will glue to the top of the fuse.
Note: Cut lines should be thinner then the
thickness of the fin. This will prevent any
wood from showing after the fin as been
glued into place.
3. Using a hobby knife cut away covering to ex-
pose the wood at the top of the fuse for the fin to
securely glue too.
4. Put epoxy into the fin slot and top of fuselage.
Note: Test fit fin to fuse before gluing to ensure fin
is square to fuse.

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5. Put epoxy into rear section of fuse were the tail
post of fin will be located.
6. Slide fin into position. Tape or hold in place un-
til glue is completely cured.
Note: Double check fin alignment before glue
dries completely.
7. Fin glued to fuse shown below.
8. Cut two small strips from the supplied white
covering to seal and hide seams for a profes-
sional finish.

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9. Fin attached to fuse with seams covered shown
below.
Elevator and Rudder
Control Horn Installation
1. Gather the elevator servos, pushrods, control
horns, mounting screws, ball links and brass
spacers as shown below.
Note: 180 in. oz. digital, metal geared servos are
recommended. Servo selection can be the
difference between a great flying model and
a model that will crash. Always use brand
name high quality servos.
2. Assemble two control horn assemblies for the
elevators as shown. The ball link goes between
the left and right sides of the control horn sides
and is secured with a nylon lock nut. Start with
the center hole in the control horn. The ball link
may be moved up or down for more or less con-
trol throw. A 1 1/2” servo arm is recommended
to achieve full deflection of the elevator bevel.
3. Place the control horn over the pre-drilled
mounting holes as shown.

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4. Use a drop of thick CA glue on each mounting
screw as shown.
5. Mount the control horn using six wood screws as
shown.
Note: Repeat installation steps for other elevator
horn.
6. Gather rudder servo with double output arm and
rudder pull - pull hardware as shown below.
2 Rudder cables
4 brass swaging tubes
4 Threaded metal RC links (Not Used)
4 Threaded couplers
4 4-40 ball links with mounting hardware
2 Brass Spacers
2 Control horns with mounting bolts and nuts
7. Assemble two control horn assemblies for the
rudder as shown. The ball link goes between the
left and right sides of the control horn sides and
is secured with a nylon lock nut. Start with the
center hole in the control horn. The ball link
may be moved in or out for more or less control
throw.