The Solar Sausage Cooker

interactives.co.uk

The Solar Sausage Cooker

The Solar Sausage Cooker

C Ian Russell 2003 ian@interactives.co.uk www.interactives.co.uk

This design and this document may be freely copied

but not altered or sold in any form


Materials required

Shiny, foil-covered 'mirror-card'.

Thin, round, wooden dowel, approximately 6mm diameter but not critical.

Flat piece of ply-wood at least 6mm thick and approximately 75mm square, drilled with a

central hole into which the wooden dowel can easily be pushed without sliding loosely.

Strong, quick-setting glue (hot glue gun?) or, preferably, double-sided sticky foam pads.

Tin of pre-cooked Frankfurter sausages.

Metal split paper fasteners.

Tools required

Scissors.

Pencil sharpener.

Instructions

Carefully cut out six identical 'petal' shapes from the foil-covered cardboard, using the template

on the next page. If it is possible to feed the sheets of card through your printer, it is best to

simply print the outline onto each mirrored sheet.

Alternatively, cut out the shape from ordinary paper and draw around it on the white,

non-mirrored side of the card. Pierce small holes exactly in the centre of the six small circles

near the edges of the shape. These holes MUST be EXACTLY in the correct positions, or your

reflector will not curve into the right shape.

Push the split metal paper fasteners through the holes to join together six 'petals', making a

flower-shape with the shiny surface on the inner, concave side. There should be a gap in the

centre of your 'flower'.

Securely stick the drilled piece of plywood across the back (non-shiny) side of this central gap.

Push the wooden dowel through the hole in the plywood. BE CAREFUL not to push the end

of the dowel into your hand, if it is a tight fit. The dowel should stick out approximately 12cm

into the middle of the 'flower'.

Use a pencil sharpener to make a blunt point on both ends of the dowel.

C Ian Russell 2003 ian@interactives.co.uk www.interactives.co.uk

This design and this document may be freely copied

but not altered or sold in any form


'Template' for each

of the six shiny 'petals'

Each hole must be

in EXACTLY the right

position

C Ian Russell 2003 ian@interactives.co.uk www.interactives.co.uk

This design and this document may be freely copied

but not altered or sold in any form


Using your Solar Sausage Cooker

You need a clear day, with no clouds in front of the sun.

Push a piece of Frankfurter sausage onto the shorter, sharpened end of the wooden dowel. It is best

if the sausage is threaded on parallel to the dowel.

Push the longer end of the wooden dowel into the ground, while carefully aiming the shiny reflector

at the sun.

Aiming at the sun is easy. Simply watch the shadow of the sausage and tilt the stem of your 'flower'

until the sausage-shadow is centred around the base of the dowel, where it comes through the hole

in the drilled piece of plywood. Hold this position while you push the dowel stem into the ground.

You may need to repeat this several times to get it right, but it is easy enough.

At this stage, so much sunlight will be reflected onto your sausage that it will be shining as brightly

as a lightbulb! It will also be getting hot.

You may need to adjust the position of the sausage by sliding it up or down the dowel. Be careful

not to burn your hand! This reflector is too small to burn you badly, but it is still sensible to shade it

with your body before putting your hand in. Slide the sausage up or down until it is evenly illuminated.

Vegetarians may prefer to cook pieces of banana.

Results depend very much on the angle of the sun and the clearness of the sky. By using

pre-cooked Frankfurter sausages it is simply a matter of heating them up without needing

dangerously high temperatures.

The 'petal' template is designed for printing at something similar to A4 size (21cm X 30cm).

By scaling it up, much higher temperatures will be reached, which may not be suitable for use

by children.

C Ian Russell 2003 ian@interactives.co.uk www.interactives.co.uk

This design and this document may be freely copied

but not altered or sold in any form

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