Hangar 9 1/4-Scale J-3 Cub ARF - Manual (Page 25)

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 .Step 20
Connect.the.rudder.tiller.bracket.to.the.tailwheel.steering.
arm.using.the.two.rudder.springs..You.will.need.to.bend.
the.springs.to.attach.them.on.each.end.using.pliers.
 .Step 21
Wrap.the.receiver.battery.and.receiver.in.1/4-inch.(6mm).
foam..Attach.the.receiver.and.receiver.battery.to.the.radio.
tray.using.hook.and.loop.straps.
 .Step 22
Slide.the.radio.tray.into.the.fuselage.and.secure.its.
position.using.two.#2.x.1/2-inch.sheet.metal.screws.
 .Step 23
Install.a.choke.ring.(JRPA029).on.each.of.the.the..
18-inch.(457mm).aileron.extensions.that.are.plugged..
into.the.receiver..These.will.be.hidden.under.the.radio..
tray..This.is.strongly.recommended.due.to.all.the.metal.
struts.on.the.Cub.
 .Step 24
Plug.two.18-inch.(457mm).servo.extensions.into..
the.receiver.and.route.them.through.the.holes.in.the..
sides.of.the.fuselage.and.up.to.the.top.of.the.fuselage..
Slide.the.radio.tray.cover.into.position.so.it.locks.into.
position.under.the.rear.cabin.wall..Use.two.#2.x.1/2-inch.
sheet.metal.screws.to.secure.the.radio.tray.cover.inside.
the.fuselage.
Radio Installation