Micron Wings FreeSpirit Manuale utente

Your kit contains the following items

Pre- cut parts

Sandpaper

Covering sheet

The FreeSpirit is a simple to build, large winged

towline glider suitable for beginner to

intermediate builders.

The wings feature a simple dihedral shape with no

tip dihedral sections to build, so construction is

very straight-forward.

The covering material for the wings is heat

activated shrink film and because it is supplied as a

tube and simply slips over the wing, there is very

little gluing required.

This bird can be flown as a hand launch glider or a

towline glider and it’s built up wing structure gives

great lift and aerodynamic properties.

Additional Items You May Need

* Foam safe glue

* Wood Glue

* Araldite

* Masking Tape

* Cling Wrap

* Hobby Knife

* Length of string for towline

Refer to these pages as you follow this manual. When you see a part written in bold in the build instructions below,

refer back to these pages to see which part it is. Leave the parts in the sheets until they are needed.

Main Body Former Tail

Wings Main Spars

Wings Leading Edge Spars

Wings Trailing Edge Spars

Ribs and Half Ribs

Wing Main Spar Joiners

Wing Mounts

Wing Tips Capping

Centre Rib

Tailplane

Vertical Stabiliser

Wings Main Spar Capping Strips

Nose Bracing Plates

Rubber bands

Wing Mount Pegs

Wing Boxing

Main Body Former

Forward Wing Braces

Towline Hook

Ballast

Getting Started

For best results you will need a flat surface to work on.

It’s preferable to have a flat piece of corkboard or

sheet of Depron foam so you will be able to pin parts

down if needed.

(image for illustration purpose only –no plans supplied with this kit)

It’s a good idea to put a layer of cling wrap over the

work surface. It’s easier to get your wing frame parts

unstuck from the cling wrap than from other materials.

Tape the cling wrap sheet to the work surface ensuring

it is completely flat and free from wrinkles.

The Wing Sections

Lay the Wing Main Spar on the work surface and

glue in place the 2 Ribs in these slots toward each

end. Ensure these are level and the Wing Main Spar

is vertical and allow it to dry. Make sure the ribs form

a 90 degree angle with the Wing Main Spar.

Alternate to the other wing and do the same.

Note: Check that the rib direction on each wing is

correct so you are making one left wing and one right

wing.

Once the first two ribs have dried, continue to glue all

the other full Wing Ribs in place making sure they

are also level and parallel to each other.

Note: The full ribs go in alternating slots.

Continue to glue in the Wing Half Ribs in place

laying the wing on a flat surface to ensure they are

level.

Looking along the leading edge will allow you to ensure

they are all lined up straight.

When gluing in the leading and trailing edges, press

them down from the top to slot in the ribs.

Continue to glue in place the trailing edge first.

Glue in place the Wings Leading Edge Spar ensuring

that the end with the notch in it is attached to the

outermost rib.

Pinning the parts to the work bench will ensure the

leading edge part is pressed well up against the ribs for

gluing.

Allow to dry before continuing.

Glue in place the Wing Tips Capping pieces in place

with the thicker end toward the leading edge of

the wings.

Pin around it to keep it in place while it dries.

Glue in place the Wing Main Spar Joiners on either

side of one of the wing’s main spars.

Ensure the bottom of the joiner pieces are flush

with the bottom of the Wing Main Spar. The

thinner joiner goes on the rear of the spar as shown

here. The gap left at the top is to accommodate the

capping strop.

Slide in the other Wing’s Main Spar and check

that the trailing edge strips and leading edge strips

from each wing meet flush in the middle.

Finally, glue in place the other wing at the Wing

Main Spar Joiner location. Ensure the Wing Main Spar

Joiners are flush with the bottom of the Wing Main

Spar.

Glue in the Centre Rib forward and aft pieces. This goes

directly on the centre line of the Wing Main Spar

Joiners. Ensure it is vertical and in line top and

bottom with the V in the joiners.

Trim the Wings Main Spar Capping Strips to size and

glue these in place in the gap just behind the Wing Main

Spar.

Take the two square Wing Boxing Bpieces and soak

them in water for about 30 minutes to soften them up.

These can then be bent to the shape of the forward section

on a wing spar.

Allow them to dry and they should hold their shape.

Glue in place the Wing Boxing pieces which cover the

top of the wings. You will need to trim the smaller pieces

to fit in the aft slot.

You may also need to sand or trim the edge of these

pieces so they slip inside the space between the wing ribs.

Sand down the wing boxing especially at the front to

follow the curve of the wing ribs.

Slide the wing covering sheet over the wings leaving an

even amount protruding from each end.

Cut a small hole in the film at the centre of the wings and

squirt in some Foam Safe Glue. We recommend using UHU

Por Expanded Polystyrene glue.

Do not use wood glue as it may affect the film. We use

foam safe glue because it becomes very tacky and this is

perfect for attaching film.

Use a scrap piece of wood to spread out the glue in the

forward and aft areas. This middle section needs to be

glued down to prevent it from lifting up when the covering

film is shrunk.

Allow to completely dry.

On the wing tips trim the film leaving about 15mm

protruding.

Apply UHU Por Expanded Polystyrene glus to the bottom

surface of the Wing Tip Capping piece.

Allow to dry and attach film from the bottom of the wing to

it.

Then apply UHU Por glue to the top of the Wing Tip

Capping piece and fold the film from under the wing over

onto it.

Next apply some UHU Por glue to the bottom surface of the

Wing Tip Capping piece directly onto the film and pull

the film from the top down to attach to it.

Use a hair dryer to gently and evenly heat the covering all

over. Start with the hair dryer about 30cm away and move

closer as needed to allow the covering to shrink. Work a

little on one side and then turn over and work on the

other side alternating to tighten both sides simultaneously.

The finished product should look like this.

Check the wings are straight and if needed slightly twist

the wings in the opposite direction and re-heat.

You may need to do this after test flying as well.

Glue in place the Main Body Former Tail to the Main

Body Former section.

Next, glue in place the Wing Mounts and Wing Mount

Pegs as shown here. Take care to make sure the Wing

Mounts are level.

Put the ballast pieces into the nose section and glue both

the Nose Bracing Plate pieces in place.

Attach the tow line hook in just behind the leading edge of

the wing. Press it into the body and araldite around it to

hold it in place.

A piece of cardboard this shape can be cut from a flat

sheet and taped to the edge of a table to be used as a

balance point test station.

Rubber bands are attached in an X pattern to the

pegs.

The tail is intentionally too long and it is designed this

way so you can use the tail length to adjust the

balance point of the glider. When doing the balance

test in the next step you can simply tape the tailplane

parts to the end of the tail to test the point of balance.

If you need to move the point of balance forward then

keep trimming about 1cm off the tail shaft at a time

till it comes into balance.

However, do not take more than 4cm off the tail.

If more than this is needed then add weight to the nose instead.

The point of Balance should be 38mm from the

leading edge of the wing.

Balanced!

Test glide the glider by launching it gently in a slightly

down pitch. If it stalls you may need more weight on

the nose. You may also need to add a 1mm thick shim

under the trailing edge of the wings to achieve a good

flight path.

If the glider turns left or right too much check that

one wing is not twisted and if so then reheat it while

twisting it gently and slightly back the opposite way.

See a test flight video on Youtube (Link)

This manual is for personal use only. No unauthorized copying or digital distributing permitted

without permission from MicronWings.

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