Furze Platt Greenpower Racing

The first trials were made making scale models of the bubble to work out the principles so that the plastic would not get wasted. The mould (which can be seen to the left of the finished scale bubble below) and the backing was made from MDF.   The oven was heated to 100 degrees Celsius for about 2 hours with the mould and plastic in it.  Air was then blown in between the plastic and the MDF backing and the bubble formed through the mould, when it reached the correct size it was then allowed to cool.  The mould is clamped in place with bolts which also go through the plastic sheet. This results in a flange which has to be sawn off.  After three trials all of which worked we went for the full size bubble.

The Mould and backing were made again from MDF, but thicker and the mould was made in two halves rather than one piece to save wastage. 

This was all cut out on a simple band saw but it could be done with a good jig saw as well.

The picture to the left is of the full size back sheet and moulding edgings lying on top. 

Note the use of a face mask when cutting MDF

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Last modified: 08/06/09