background image

13

E102056#1

7.6 Balancing

7.6.1 Side balance

    Lay the wings on a table top and try to balance them. They should always fall to different sides. If this does 

not happen add a little weight to the lighter wing tip. Glue small pieces of lead to the wing tip.

7.6.2 Fix the wings to the fuselage with a diagonally stretched rubber band.

7.6.3 Finding the centre of gravity

    Hold the the plane with two fingers placed under the wing by the main spar or place it on the handles of an 

open pair of pliers set in a vice

    Add lead shot to the weight chamber (starting at the front chamber) until the model lies flat with its nose 

slightly downward.

    Your model is now ready to fly

7.7 Flying

7.7.1 The Wind Flyer 2 is designed for flying only in light or no wind conditions only. For your first flight choose an 

absolutely still day and a lightly sloping flying field

7.7.2 If you fly in any wind always launch the model into the wind.

    Hold the model between two fingers just behind the tow hook and launch it forward into the wind. This will 

need some practice!

   

Note:

  Of course you must have checked the balance first

7.7.3 If the model 'pumps up and down' in flight add a 15 x 25mm card strip under the trailing edge of the wing.( 

The angle of attack is mad e smaller)

    Keep repeating this stage until a smooth flight path is achieved

7.7.4 If the model dives add card strips under the leading edge of the wing ( the angle of attack is made larger)

    Repeat this step until a smooth flight path is achieved

7.7.5 If the model flies in a curve a flap needs to be to cut in the wing on the side that the flight curves

    - Make an 8mm deep cut in the trailing edge of the wing, 25mm and 105mm from the wing tip. Then cut a  

   2mm deep line between them. (See wing diagram)

  Note:

  do not cut the lengthways line all the way through!

- Now bend this flap carefully down until the model flies straight

- Once the flight pattern is correct this flap can be fixed in position with a few spots of glue.

7.7.6 If the model flies into a curve without banking then a rudder flap needs to be cut on the tail fin

    - When the fin was made, there was a place for an upper and lower cut to make the rudder 

    Now make a 1mm connecting cut between these cuts on the fin and bend the flap in the required direction 

until the flight path straightens.

  Note:

  Only score this connecting line do not cut all the way through the fin.

- Once you are satisfied the rudder can be fixed with a few spots of glue. 

7.7.7 For a towline start you need 25-50 metres of line.

    If you have never launched a model with a towline it is better if you find someone with experience who will, 

glad to help you.

We wish you lots of fun with your Wind Flyer 2

Содержание 102.056

Страница 1: ...ded for pupils 10 years old plus by B Elsner Please Note The OPITEC range of projects is not intended as play toys for young children They are teaching aids for young people learning the skills of Cra...

Страница 2: ...ish Wood varnish Base coat plus finish also in spray form Staining Water based finish with clear varnish 2 2 Material Depron thermoplastic Polystyrol hard foam PS white Working Cutting with a modellin...

Страница 3: ...55 x 255 2 Nose sides 2 Balsa 2 x 48 x 95 3 Fuselage boom 1 Pine strip 6 x 8 x 495 4 Wing support 1 Balsa 2 x 20 x 125 5 Wing dowels 2 Beech dowel 3mm dia x 125 6 Fixing dowels 2 Beech dowel ca 3 x 2...

Страница 4: ...056 1 6 The layout of the balsa pre cut ribs sheet and Depron 62 5 4 13a 12 2 2 7 8 12 13 Pre cut balsa ribs etc Balsa sheet tailplane Depron sheet Note Do not alter the layout due to the cutting dire...

Страница 5: ...selage 7 1 1 Assemble the building plan Pages 15 17 19 3 pages by cutting the plans along the broken lines and sello tape them together Note Note the markings 7 1 2 Cut out the pattern for the nose se...

Страница 6: ...plan as reference glue one dowel at the front end of the nose and the other at the end see plan Note Do not cut both of these pieces from the same length of dowel 7 1 9 Sand the nose and then chamfer...

Страница 7: ...he plane has been flown 7 2 3 Sand the curves of the Fin and Tailplane to shape with a block and glasspaper Note The underneath of the Fin 8 must not be sanded 7 2 4 Ensure the Fin fits in the slot in...

Страница 8: ...egularities can be removed on the top or bottom of the ribs can be smoothed in this way 7 3 5 Cut out the patterns for the angled wing supports 13a from the plan Use the patterns on the balsa sheet an...

Страница 9: ...middle ribs A must not be glued 7 3 11 Glue the angle supports 13a against the second rib and leave to dry thoroughly 7 3 12 Place the middle rib A on the end of the main wing spar and lean it against...

Страница 10: ...only apply glue to the ribs and spar The middle line on the joiner must be just visible Rub the joiner on the glued area and leave to dry for approximately 1 2 hour 7 3 20 Weight one half of the wings...

Страница 11: ...and gently stretch it over the wing smoothing out any wrinkles as you go 7 4 4 Coat the top of the wing leading edge etc with paste 7 4 5 Hold the wing in the air turn it slowly so that the covering...

Страница 12: ...l stop the wings from warping 7 3 8 Once dry the wing can be coated with a thinned 1 1 mixture of shrinking dope and thinners and placed on the trailing edge to dry 7 3 9 Coat the wings once more with...

Страница 13: ...k is mad e smaller Keep repeating this stage until a smooth flight path is achieved 7 7 4 If the model dives add card strips under the leading edge of the wing the angle of attack is made larger Repea...

Страница 14: ...14 E102056 1...

Страница 15: ...15 E102056 1 Plan patterns Scale 1 1 1 2 3 11 9 12 5 4 10 6 6 6...

Страница 16: ...16 E102056 1...

Страница 17: ...Plan patterns Scale 1 1 17 E102056 1 Pattern for the nose 1 Win d Flyer 2 Win d Flyer 2 Hochstarthaken...

Страница 18: ...18 E102056 1...

Страница 19: ...Plan pattern Scale 1 1 19 E102056 1 Pattern tailplane Pattern nose side clad ding Pattern tail fin Pattern wing rood angle joiner 8 7...

Страница 20: ...20 E102056 1...

Страница 21: ...Wing patterns Scale 1 1 4 5 21 E102056 1 Selloptape 9 13 12 12 10 11 Left hand wing half Shape the tips as shown...

Страница 22: ...22 E102056 1...

Страница 23: ...23 E102056 1 Patterns for parts 15 16 17 and 22 scale 1 1 12 12 13a 13a 16 15 14 10 9 11 13a Middle rib A Flight direction...

Страница 24: ...24 E102056 1...

Страница 25: ...25 E102056 1 Patterns for parts 15 16 17 and 22 Scale 1 1 70 25 105 If found please notify the owner Name Address Town Tel 13 12 12 Right hand wing half...

Отзывы: