Tower Hobbies 1/5 Piper J-3 Cub 40 GP ARF .40-.46,81"

Tower Stock# LXFBMG  •  Manufacturer Stock# TOWA4035
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Notes from our tech department:
This is the Tower Hobbies, Radio Controlled, Glow Powered
Almost Ready to Fly 1/5 scale Piper J-3 Cub Airplane.
Designed for the Beginner to Intermediate Flier.

90% Factory-Built and Truer to the Original Plane than Most other R/C versions.


Construction: Balsa and ply
Covering: High quality shrink film
Cowl: Painted fiberglass
Wing: One-piece 81" bolt-on wing, IMAA legal, wood struts are
pre-sanded into an airfoil shape for a more authentic look than
flat struts, and also to minimize drag, Struts are REQUIRED to
safely fly this airplane. It must not be flown without struts
under any circumstances
Aileron Control: Dual servo, with "barndoor" type ailerons for
greater realism
Engine Mount: Two-piece composite construction, Adjustable
Landing Gear: Prebent wire, 3-3/8" (85.5mm) foam tires, 1" (25.4mm)
Fuel Tank: 9.1oz (270cc)
Build Time: Flight-ready in 15-20 hours,
Warranty: Tower Hobbies guarantees this kit to be free from defects
in both material and workmanship at the date of purchase. This
warranty does not cover any component parts damaged by use or


Photo Illustrated Instruction Manual, Decals, One-Piece Pre-Painted
Fiberglass Cowl, ABS Dummy Engines, Adjustable Engine Mount,
Hardware Package, Factory-Built Fuselage, Wings and Tail Sections,
Fuel Tank, Firm 3-3/8" Foam Tires Mounted on Cub Rims, Pre-Bent
Wire Landing Gear, Pre-Built Wing Struts, Clear Butyrate
Windshield and Side Windows, Pushrods, Tailwheel Wire w/1"
Tailwheel, CA Hinge Strip


Wingspan: 81" (2055mm)
Wing Area: 984 sq in (63.5 sq dm)
Wing Loading: 19.9 oz/sq ft (61 g-sq dm)
Fuselage Length: 49" (1245mm)
Weight: 8.5lb (3860g)
Airfoil: Clark Y-Type, Flat-Bottom, High-Wing
Center of Gravity: 4" (103mm) back from the leading edge of the wing.
Control Throws: High Rate Low Rate
Elevator: Up & Down 1-1/8" (28mm) 5/8" (16mm)
Ailerons: Up & Down " (19mm) 9/16" (14mm)
Rudder: Right & Left 1" (38mm) 1" (25mm)


Engine: .40-.46 cu in 2-stroke (Some modifications required) or
.52-.70 cu in (8.0-11.5cc) 4-Stroke
Muffler: Sport or Pitts Style to fit into the cowl
Radio: 4 Channel w/5 standard servos
Y-harness: 1 for aileron servos
18" Servo Extensions: 2 for aileron servos
Misc Items: Propeller, Medium Fuel Tubing, " Latex Foam Rubber,
Fueling System, 8-32 Tap/#29 Drill Bit, Building and Field
Equipment, prop nut to match engine's crankshaft size.


This model does not have float mounts in it. The model would need to
be modified to accept floats. The GPMQ1874 60-size Float Kit will
work with this kit.

If a replacement fuel tank is needed, an 8oz (240cc) tank such as the
SULQ1439 can be used. Some minor modification may be needed as this
is not the exact shape of the original tank.

About joining wings- pg.6 of instructions says to test fit the wing
halves and to sand any high spots on the root end of the wings so
there is no gap when you join them. If there is too large a gap to
sand away, it may be shimmed with a piece of balsa and balsa filler
or epoxy. The idea is that the wing is straight upon assembly,
and has no twisting motion at the joint. Epoxy gives more weight
than balsa filler, or micro balloon filler which can also be used
to fill the gap. This wing is flat-bottom and can be assembled on a
flat surface. The landing gear wires are taped to the underside of
wing support cardboard.

mgc 4/7/15



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