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1½ litre
'Egglofter' Pictures
These
are photographs taken on a recent expedition
to the park (Sinfin Moor Park in Derby in
the UK to be precise)
 The
launcher with the two 'Egglofter' shaped
rockets on the right.The launcher's
release string is a nylon or polyester string
that extends 20 or so metres off to the
right.
In addition to this, we also carried
around 7 litres of water - some of which had
dye in it so that we could see just how far
it went up into the air on take-off.
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 Pumping
up the pressure. Note the waterproof jacket
and the foot on the release string with a
good yard or so of slack - the first time I
did this, the kids thought that it would be a
good idea to release the rocket before I had
finisherd pumping.All of the pockets are
zipped up, the velcro is tight on the storm
cuffs, the hood is done up tightly, and so
on. Taking this type of precation means that
you stand a better chance of keeping dry -
never a bad thing.
In this photograph, you can clearly see
the shape of the plastic fins. They are taped
around the edge with gaffer tape with the
fold in the plastic on the leading edge.
The water has a dye in it to make it
easier to see on photographs.
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 The
ground crew pulling gently on the release
string. It does not require much force to
pull it.This is typical of many launch
photographs - a blur where the rocket is (it
is traveling at nearly 90 mph at this point).
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 The
photograph on the left has been processed
digitaly using an edge detect function to
show (in the right half) where the
rocket is. This photograph has motion blur
in it caused by the photographer (me) moving
the camera in order to attempt to keep the
rocket in the frame. As a result of this,
both the rocket and the ground are blurred.
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