Seagull Models JUMPER 25 Manuel utilisateur

Arising Star InstructionManual

Made in Vietnam.

• Ready-made—minimalassembly&finishingrequired.

• Comprensivehardwarepack includingwheels,tank,parts,undercarriage&

spinner.

• Photo-illustrated step-by-step AssemblyManual.

Specifications:

Wingspan _________________________55 in, 139cm.

Wing area ___________________ 480 sq.in, 31 sq.dm.

Length____________________________41 in, 103cm.

Approximate flying weight______ 4.9-5.5 lbs, 2.2-2.5kg.

Recommended engine size ___.25-.32 cu.in 2-stroke.

Radio System required 4 channel with 4 servo.

Flying skill level --------------------- High wingTrainer.

INSTRUCTION MANUAL

MS:15.

Kit features.

Additionalitemsrequired.

Engine.

4 Channel or greater Radio Control system.

Glues.

Tools.

Starting Equipment.

JUMPER 25. Instruction Manual.

INTRODUCTION.

Thank you for choosing the JUMPER 25 ARTF by SEAGULL MODELS. The JUMPER 25 was

designed with the intermediate/advanced sport flyer in mind. It is a High-wing aeroplane which is

easytoflyandquicktoassemble.Theairframeisconventionallybuiltusingbalsa,plywoodtomake

itstrongerthantheaverage ARTF, yet the designallowstheaeroplanetobekeptlight.Youwill find

that most of the work has been done for you already. Flying the JUMPER 25 is simply a joy.

This instruction manual is designed to help you build a great flying aeroplane. Please read this

manual thoroughly before starting assembly of your JUMPER 25. Use the parts listing below to

identify all parts.

WARNING.

Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it is capable

of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOU ASSUME ALL

RISK&RESPONSIBILITY.

IfyouareinexperiencedwithbasicR/CflightwestronglyrecommendyoucontactyourR/Csupplier

and join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of training

proceduresdesignedto helpthenewpilotonhis waytosuccessfulR/Cflight. Theywillalsobeable

to advise on any insurance and safety regulations that may apply.

ADDITIONAL ITEMS REQUIRED.

.25-.32 cu. in 2-stroke engine.

4-channel radio with four digital

servos.

Glow plug to suit engine.

Propeller to suit engine.

Protective foam rubber for radio

system.

Siliconefuel line.

TOOLS & SUPPLIES NEEDED.

Thick cyanoacrylate glue.

30 minute epoxy.

5 minute epoxy.

Hand or electric drill.

Assorted drill bits.

Modellingknife.

Straight edge ruler.

2mm ball driver.

Phillips head screwdriver.

220 grit sandpaper.

90° square or builder’s triangle.

Wire cutters.

Masking tape & T-pins.

Thread-lock.

Paper towels.

PARTS LISTING.

FUSELAGE ASSEMBLY

(1) Fuselage.

(1) Pre-installed servo tray.

(1) Pre-installed motor mount.

(1) Pre-installed rudder pushrod.

(1) Pre-installed elevator pushrod.

WING ASSEMBLY

(1) Right wing haft/ aileron.

(1) Left wing half/ aileron.

(1) Plywood wing dihedral brace.

(1) Covering strip for centre section

joint.

TAIL SECTION ASSEMBLY

(1) Horizontal stabilizer/ elevator

halves.

(1) Rudder/ halves.

Some more parts.

HARDWAREPACK

COWLING

Landing gear .....

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NOTE:To avoid scratching your new aero-

plane we suggest that you cover

your workbench with an old towel.

Keepacoupleofjarsorbowlshandy

toholdthesmallpartsafteryouopen

the bags.

Please trial fit all parts. Make sure

you have the correct parts and that

they fit and are aligned properly be-

fore gluing! This will ensure proper

assembly as the JUMPER 25 is

made from natural materials and

minor adjustments may have to be

made.

The paint and plastic parts used in

thiskit are fuelproof. However,they

arenottolerantofmanyharshchemi-

cals including the following: paint

thinner, cyano-acrylate glue accel-

erator,cyanoacrylategluede-bonder

andacetone.Donotletthesechemi-

calscomeincontactwiththecolours

onthecoveringandtheplasticparts.

Maskingtape.

Centreline.

Expoxy.

2) Remove the brace when satisfied with

its fit ineach wing half. Coat both sides of one

halfofthedihedralbracewith30minuteepoxy.

Next,poursomeepoxyintothedihedralboxin

one wing panel. Make sure you cover the top

andbottomaswellasthesidesofthedihedral

brace. Use enough epoxy to fill any gaps.

 1)Testfitthewingtubeintoeachwinghalf.

The brace should slide in easily up to the

centreline that you drew.If not, use 220 grit

sandpaper with a sanding block and sand

down the edges and ends of the brace until it

fits properly.

WING ASSEMBLY.

NOTE: We highly recommend using 30

minute epoxy as it is stronger and provides

more working time, allowing the builder to

properlyaligntheparts.Usingfastcureepoxy

whenjoiningthewinghalvescouldresultinthe

gluedryingbeforethewinghalvesarealigned

properlywhichmayresultinfailureofthewing

centre section during flight.

Carefully slide the two wing halves together

and firmly press them together, allowing the

excess epoxy to run out. There should not be

any gap in the wing halves. Use rubbing

alcohol and a paper tower to clean up any

excess epoxy.

Apply masking tape at the wing join to hold

the wing halves together securely.

JUMPER 25. Instruction Manual.

✔ ) Carefully apply masking tape around

thetopandbottom edgeoftherootribofeach

winghalftoprotectthemfromdamagecaused

byepoxy.

1) Installthe rubber grommets andbrass

colletsontotheaileronservo. Testfittheservo

into the aileron servo mount.

Because the size of servos differ, you

may need to adjust the size of the precut

opening in the mount. The notch in the sides

of the mount allow the servo lead to pass

through.

2) Remove the aileron servo. Place the

mountontothe wing, aligning the cutoutin the

mount with the cutout in the wing. The two

notches in the mount should face the leading

edge of the wing.

3) While holding the servo mount firmly

in place, trace around it using a pen.

4) Remove the mount, and using a mod-

elingknife,carefullyremovethecovering from

inside the outline you drew.

5) Using 6 Minute Epoxy, glue the servo

mount into place. Remove any excess epoxy

usinga paper toweland rubbingalcohol. Use

piecesofmaskingtapeto hold the trayinplace

until the epoxy fully cures.

✗ ) Peel off the backing from the self

adhesive covering strip. Apply the strip to the

center section of the wing starting from the

bottomtrailingedge.Wrapthestripalltheway

aroundthewinguntil itmeetsthetrailingedge

again. Trim off any excess strip.

✕ ) Mix a generous amount of 30 minute

epoxy. Coat the exposed half of the dihedral

brace, and the remaining wing joiner box and

both root ribs with epoxy. Slide the two wing

halvestogetherand carefully alignthematthe

leading and trailing edges. Wipe away any

excess epoxy using paper towels. Use mask-

ingtape wrapped aroundthecenter section to

hold the halves in place until the epoxy cures.

✖ ) When the epoxy has cured, carefully

remove the masking tape from the wing.

INSTALLING THEAILERON SERVO MOUNT.

Epoxy attach.

Maskingtape.

Pen.

Servo

mount.

 3 ) Peel off the backing from the self

adhesive covering strip. Apply the strip to the

centre section of the wing starting from the

bottomtrailingedge.Wrapthestripalltheway

aroundthewinguntil itmeetsthetrailingedge

again. Trim off any excess strip.

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Install the aileron servo into the servo

mount, withtheoutput shaft towards thelead-

ing edge of the wing, using the wood screws

provided with your radio system. Drill 1/16”

pilot holes through the mount before installing

the screws. This will prevent the wood from

splitting.

1) Thread one nylon adjustable control

horn onto each aileron torque rod. Thread the

horns on until they are flush with the ends of

the torque rods.

2) Thread one nylon clevis at least 5/16”

onto each of the two threaded wires.

3) Withtheaileronservo centered, install

theservoarm onto the servo. The arm should

beinstalledso itisparallelwith thetrailingedge

of the wing.

INSTALLING THE AILERON LINKAGE.

Removecovering.

Epoxy.

4) Slide the pushrod wires through the

servo as shown.

5) With both the aileron servo and the ai-

leronscentered.Tightentheset screws on the

servo.

Pushrodwire.

INSTALLING THE AILERON SERVO.

3) Carefully bend the second nylon tube

up at a 45º angle. This tube is the vent tube.

1) Using a modeling knife, carefully cut

off the rear portion of one of the 3 nylon tubes

leaving 1/2” protruding from the rear of the

stopper. This will be the fuel pick up tube.

2) Usingamodeling knife, cut onelength

ofsiliconfuelline. Connectone end of the line

tothe weighted fuel pick up andthe otherend

to the nylon pick up tube.

INSTALLING THE STOPPERASSEMBLY.

FUEL TANK.

JUMPER 25. Instruction Manual.

Attach the silicone fuel and pressure pipes

tothetank.Thelowerpipeisthe‘feed’andthe

uppertwothe ‘pressure and fill’. Thefill pipe is

the next pipe.

Vent tube.

FuelPick-upTube.

FuelFill Tube.

Carefully use a lighter or heat gun to

permenently set the angle of the vent tube.

Important: When the stopper assembly is

installed in the tank, the top of the vent tube

should rest just below the top surface of the

tank. It should not touch the top of the tank.

4) Test fit the stopper assembly into the

tank. It may be necessary to remove some of

the flashing around the tank opening using a

modeling knife. If flashing is present, make

sure none falls into the tank.

5) With the stopper assembly in place,

the weighted pick-up should rest away from

therear of thetankand move freelyinsidethe

tank. The top of the vent tube should rest just

below the top of the tank. It should not touch

the top of the tank.

6) When satisfied with the alignment of

thestopperassembly tightenthe3mmx20mm

machine screw until the rubber stopper ex-

pands and seals the tank opening. Do not

overtighten the assembly as this could cause

the tank to split.

You should mark which tube is the vent

and which is the fuel pick up when you attach

fuel tubing to the tubes in the stopper. Once

thetank is installed insidethe fuselage, itmay

be difficult to determine which is which.

Fueltank.

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Balsa wood.

Blow through one of the lines to ensure

the fuel lines have not become kinked inside

the fuel tank compartment. Air should flow

through easily.

4) Insert the main gear wire into the

mounting slot.

5) Remove the two straps and the gear

wire. Drill four 3/32” pilot holes into the fuse-

lage for the wood screws.

3x10mm.

2) Slide one wheel onto each axle and

pushthem up against the wheelcollars. Slide

the remaining wheel collars with set screws

onto the axles. Push them up against the

wheels and tighten the set screws. The

wheels should spin free and not bind in any

way. If they do bind, loosen the set screws in

the outer wheel collars and move the collars

outasmallamount. Retightenthe set screws.

INSTALLING THE MAINGEAR WHEELS.

1) Slideonewheelcollarwith3mmx6mm

set screw onto each axle. Push the wheel

collarson as far as theywill goand tighten the

set screws.

Be careful not to overtighten the set

screws. Overtightening may cause the

threads to strip.

1) Using a modeling knife, remove the

covering from over the two main gear mount-

ing slots located in the bottom of the fuselage.

INSTALLING THE MAIN GEAR WIRES.

Thestrapsshouldbelocated equal distance

from the inside and outside ends of the wire.

3) The landing gear wire is held in place

using two nylon landing gear straps and four

3mm x 10mm wood screws.

2) Usingthetwo landing gear strapsas a

guide, mark the locations of the four 3mm x

10mmmountingscrewsontothefuselagesur-

face.

Fuel pick-up

tube.

Fuelfill tube.

Vent tube.

JUMPER 25. Instruction Manual.

Steering arm.

Connector.

Installing steering arm as follow.

Adjust the nose gear steering arm until the

arm is parallel with the fire wall.

NOSE GEAR INSTALLATION.



1) Install the pushrod housing through the

predrilledholeinthefirewallandintotheservo

compartment. The pushrod housing should

protrude 1/4" out past the front of the firewall.

Make a Z-Bend 1/4" from one end of the plain

wire pushrod.

 2) Place your engine onto the engine

mount. Adjust the engine is centered of the

edges of the engine case.

4) Remove the engine. Using an drill bit,

drill the mounting holes through the engine

mount at the four locations marked.

 3) When you are satisfied with the align-

ment, mark the locations of the engine

mounting.

MOUNTING THE ENGINE.

11cm.

Slide one wheel onto the axle and push

them up against the wheel collars. Slide the

remaining wheel collars with set screws onto

the axles. Push them up against the wheels

andtightentheset screws. The wheelsshould

spin free and

INSTALLING THE NOSE GEAR WHEEL.

Steering arm.

Pushrod wire.

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3/32” Hole.

 5) Bolt the engine to the engine mount

usingthe four machine screws.Double cheek

thatallthescrewsaretightbeforeproceeding.

 6) AttachtheZ-Bend in the pushrod wire

to the throttle arm on the carburetor. You will

need to remove the throttle arm from the car-

buretor to be able to attach the Z-bend. When

complete, reattach the throttle arm to the car-

buretor.

Installthespinnerbackplate,propellerand

spinner cone.

INSTALLING THE SPINNER.

3 x 25mm.

INSTALLING THE SWITCH.

Install the switch into the precut hole in the

side, in the fuselage.

Remove covering.

The propeller should not touch any part

of the spinner cone. If it does, use a

sharp modeling knife and carefully trim away

the spinner cone where the propeller comes

in contact with it.

2.5mm.

3 x 25mm.

Pushrod wire.

JUMPER 25. Instruction Manual.

Removecovering.

3) Slidethestabilizerintoplace inthepre-

cut slot in the rear of the fuselage. The stabi-

lizer should be pushed firmly against the front

of the slot.

HORIZONTALSTABILIZER.

1) Using a ruler and a pen, locate the

centerlineof thehorizontalstabilizer,atthetrail-

ing edge, and place a mark. Use a triangle

and extend this mark, from back to front,

across the top of the stabilizer. Also extend

thismark down the backof thetrailing edge of

the stabilizer.

The top of the stabilizer does not have

the hinge pins exposed.

2) Using a modeling knife, carefully re-

move the covering from over the vertical sta-

bilizermounting slot in thetop of thefuselage.

Drawcenterline.

Pen.

6) Using a modeling knife, carefully re-

move the covering that overlaps the stabilizer

mounting platform sides in the fuselage. Re-

move the covering from both the top and the

bottom of the platform sides.

4) With the stabilizer held firmly in place,

use a pen and draw lines onto the stabilizer

where it and the fuselage sides meet. Do this

on both the right and left sides and top and

bottom of the stabilizer.

5) Remove the stabilizer. Usingthe lines

youjust drew as a guide,carefully removethe

covering from between them using a model-

ingknife.

When cutting through the covering to re-

moveit, cut with only enoughpressure toonly

cut through the covering itself. Cutting into

the balsa structure may weaken it.

Switch.

INSTALLING THE FUSELAGE SERVOS.

Elevator servo.

Rudder servo.

Throttle servo.

Removecovering.

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