This is my 35% Yak 54 project incorporating some out of the box thinking

This airplane is a kit built with modification where I felt was needed.

First, I want to make it less expensive by excluding those super expensive electronic where it was possible,

yet, conserve all safety integrity.

First, the wings, by adding Boost Tabs, I was adding a very large amount of power to the single servos per

control surfaces.

You outline the boos tab on the control surfaces , here you see the rudder. The surface needed for a good boost tab,

is appoximately 10% of the control surface.

When cutting out the tab surface, you will need to cut more for the added trailing edge of the control surface

and leading edge tab

.

These are some of the tiny control horn that will be glued inside the tabs, I fabricate these, but you could

use any 1/2A size.

Here you see the tab assembled, cutout for a 70 oz servo. The tab push rod is 1/16 in aluminum threaded 2*56

This is the rudder with the tab cut out, and the tiny boost tab servo cut out as the rudder will operate

on the boost tab only without the usuall rudder servol. The servo here is a Hitec 81 with metal gears

All other servos are Multiplex Royals at 70 oz of torque.

This is the tiny control horn I fabricated for this project

Control on the rudder is finished.

One of the tiny control rods with 2*56 thread and 2*56 screw on the end

This is one of the wing panels with the tab done and control horns and push rod installed

This was an attempt to balance the control surface, which I discarded, I didn't like it, so I found anothe and better way.

So I decided to extend the wing tip to create an aerodynamic balancer and add weight to completely

mass balance the control surface.

Here you see the weight added to the aerodynamic balance

These two aluminum tubes were added to stiffen the added balsa balancer

Here is my way for shock absorbing installation for the two tiny Sombra Labs Shadow III receivers plus the

the power buss system for servo power and receiver power. Every channel is connected with my Fiber Optic

servo extensions. That plywood plate holding these, is hanging by lastics for a vibration free installation.

Two tiny antenas

Covering well on its way

Hinge gap sealing, very important.

More covering , this time, a wing panel.

My novel way of installing the robart hinges and aileron., don't laugh it works using masking tape as you can see here.

More hinge gap sealing

I have made the decision to make the rudder/fin removable to have better access to wiring in the back of the airplane.

The fuel tank system I have decided to go with, a Pepsi bottle, with many sizes availlable.

This is the powerfull EVO 80 which I import from Spain.

Fiber Optic installation

The completed wing panel except for the servo panel not covered

Tail wheel added

The completed rudder/servo/boost tab.

The completed airplane asside from the cowling, yet to be painted.

Gives you a size comparison, the trailer is 18 feet long

Again thinking out of the box, for cooling

I made this fan which of course rotates with the propeller