|On the launcher, the top of my
head is level with the rocket, just about where
the top of the trees are in the picture.
point where the parachute nose cone joins the top
2 litre bottle is just out of my reach if I stand
on the tips of my toes.
Any tapes that hold the nose in place during
pressurisation must be pulled from the top,
slowly and carefully so that the nose is not
The water level in the bottom 3 litre bottle
is just under 2/3rds of the way up.
The nose cone has two rows of small holes
(1/8th" diameter made with a soldering iron)
on the straight section, next to the curve of the
top of the cone, just where it straightens out.
This is a low pressure zone and this low pressure
will keep the nose on while the rocket is
traveling upwards. At apogee, the rocket has
stopped, the pressure has increased and as the
rocket rotates to face the ground, the cone
separates and releases the parachute.