Model Airplane News – August 2019

50 ModelAirplaneNews.com

M

y Aeronca Champ is 1/10 scale and has a

42 1/2-inch wingspan, making for a nice,

compact 4-channel RC flier. The model

has removable plug-in wings for easy transport

in small vehicles, and features a functional cabin

door for easy battery access without the need

for an external hatch. Control incorporates four

submicro servos, with power provided by a Suppo

2208 outrunner motor and a 2S LiPo battery pack.

The Champ features old-school stick-and-tissue

construction and easy-to-assemble egg crate–style

wing construction. Laminated outlines are used on

the wings and tail to keep the structure strong and

light. The model also features true-scale outlines and

scale rib spacing, so the model not only flies well but

also has a scalelike appearance. To make life easier

for the scratch builder, a vacuum-formed engine

cowl and a windshield are available from Park Flyer

Plastics (parkflyerplastics.com).

Aeronca 7AC Champ

This classic “Airknocker” is easy to build and a great flier

Th e Champ is set up and ready for her maiden fl ight.

CONSTRUCTION

TEXT & PHOTOS BY PAT TRITLE

WOOD

2 1/16 x 4 x 36 in. balsa sheet

1 3/32 x 4 x 36 in. balsa sheet

1 1/8 x 4 x 36 in. balsa sheet

1 1/8 x 4 x 4 in. light ply

1 1/32 x 2 x 2 in. birch ply

1 1/16 sq. x 12 in. basswood

10 1/16 x 1/8 x 36 in. balsa

1 1/16 x 3/16 x 36 in. balsa

2 1/16 x 1/4 x 36 in. balsa

1 3/32 x 1/8 x 36 in. balsa

1 3/32 x 3/16 x 36 in. balsa

8 1/8 sq. x 36 in. balsa

1 1/8 x 1/4 x 12 in. balsa

1 3/16 x 3/8 x 36 in. balsa

WIRE AND TUBING

1 .025 x 18 in. steel wire

1 .032 x 18 in. steel wire

1 .046 x 18 in. steel wire

1 .062 x 18 in. steel wire

1 1/16 O.D. x 4 in. aluminum tube

1 5/32 O.D. x 12 in. aluminum tube

1 3/32 O.D. x 4 in. brass tube

1 1/8 O.D. x 18 in. brass tube

OTHER HARDWARE

2 3/32 in. wheel collar

2 #2 flat washer

1 pr. 2-in. main wheels

1 1/2-in. tailwheel

1 5-ft. heavy-duty nylon thread

1 plastic cowl and windshield

1 .006 x 4 x 8 in. acetate

1 roll covering material

1 1/16 O.D. x 12 in. plastic tube

1 round wood toothpick

1 light CA glue hinge stock

1 manila file folder

POWER AND GUIDANCE

1 Suppo 2208/17 outrunner motor

1 12A ESC

1 GWS 8-4HD propeller

1 2S 800mAh LiPo battery

2 Suppo 4.4g submicro servo

2 Suppo 6g submicro servo

2 9-in. servo extension lead

1 6-in. Y-lead

Materials List