Eze -25

BMFC

Eze-25 Control-line stunt trainerDesigned by Keith Renecle for .25 to .30 engines

Original model flown with Enya SS30S

Inch scale

Cm. scale

00 11 22 33 44 55 66 77 88 99 1010

00 11 22 33 44 55 66 77 88 99 1010 11 1122 2233 3344 4455 5566 6677 7788 8899 992020 3030

Wingspan 45 inches

Hardwood engine bearers

½”Pine

6mm dowel5mm steel shaft

Width to suit your engine

1/16” piano wiretail skid

Rudder fin, stab, elevator are 3/16” Balsa woodThis plan shows half stab/elevator.

Elevator horn from 3 mm ply woodBush hole with 1/8” brass tubing.Glue small strips of 3/16” balsaon either side of horn on top of elevator to strengthen it

Cut out to fit elevator hornon right half of elevator, andsmall cut-out on stab

EZE-25 Root

EZE-25 Tip

Wing-tip rib1/8” balsa

3” Nylon bellcrankLead-out rake guide (1/16" ply)M3 x 15 boltThin tubing

or eyelets

Washer

Foam leading edge templates

Holes for nails

Width of foam block at the tip

Width of foam block at root

Make from 4 mm nylon

1st Cut

2nd Cut

3rd Cut

4th Cut

Cutting the foam cores

Rib TemplateRibs are 1/8” balsa

Landing gear from 1/8” Piano wire

Fuel tank made from tin platePipes are 1/8” (3 mm) brass or copper tubing

Fuel Tank

1/4” Balsa leading edgetrim and sand to shape

The length of the foam coreis 21 inches (533.4 mm)

For the ribs directly on the fuselage,cut here. Do this by placing the outer rib over the inner rib, and using it as a template.

Cutting the foam cores

Step 1 Step 2

Step 3 Step 4

Step 5 Step 6