Each flight log entry usually
represents a launch or test day, and describes the
events that took place.
Click on an image to view a larger image, and
browser's BACK button to return back to the
Day 109 - Polaron G2 flights
Early morning start. It's still a bit chilly
in the mornings.
The rocket uses 3.8L of water. Step ladder
Top of the rocket is screwed on, and the
backup parachute is packed.
Launched at 230psi. Here is the start of the
View from 842 feet.
Looking east to Doonside road.
Both main and backup parachutes opened just
The rocket lands gently.
John giving me a hand to turn off the camera
Back to the launch site to set up again.
John got to launch quite a few pyro rockets.
Paul writing in his rocket details in the
launch log book.
Hooking up the igniter. His rocket "Flygon"
flew on a D12-7
Warming up now, ...re-filling for second
Launch crew doing final inspections.
Ready to launch... yellow string arms the
rocket, pink string launches it ... or is it the
other way round?
Second launch at 240psi.
Coming down from 818 feet.
You can see Prospect reservoir from here.
69.3 seconds later coming down to a soft
Hurray ... no need for repairs today.
July 20118:30am - 1:00pm
Doonside, NSW, Australia
Conditions:Blue skies, >5km/h wind, temp ~20C
Team Members at Event:PK, Paul K, John K, and
Launch Day Report
We've had a short break from water rocket
construction in the last couple of weeks to
catch up on a couple of other projects. This
weekend we decided to fly the Polaron G2
rocket again but this time at a higher
pressure to see how it held up.
We arrived at the launch site at 8:30am and the skies were
blue and almost no wind to speak of. We try
to only launch this rocket in calm
conditions to make sure it goes in a
predictable direction should things go wrong. We
again used the air
hose extension to the launcher so that we
were well clear of the rocket.
The rocket configuration was the same as
the last launch with the exception of the
higher pressure of 230psi (15.8 bar). The
rocket took off well and flew to 842 feet
(256m) and opened it's main parachute
just after apogee with the backup opening
shortly after. The rocket landed gently on
it's side about 30m away. You couldn't have
asked for a better flight. This was our
highest single stage rocket flight to date,
and the second highest overall.
On the second launch we pressurised the
rocket to 240psi (16.5 bar). The flight was almost
identical to the first with both the main
and backup parachutes opening at almost the
same time just past apogee again. The rocket
only reached 818 feet (249m) this
time which was a little disappointing
considering it had more pressure in it,
but from the video you could see there was a
slight fishtail in the flight path so some
speed would have washed off then. The rocket
took 69.3 seconds to land which I believe is
our longest flight duration.
On both of these flights, the rocket
wasn't pointed vertically, but angled about
5 degrees away from the people and parked
Here is a highlights video of the two
During the last two weeks Paul also built
Aspire pyro rocket. He did the whole
construction and painting himself with me
mostly just helping to hold things. He flew
it on a D12-7 motor and it went straight as
an arrow and very high. The given table for
this rocket and motor combination says
around 1300 feet, but without an altimeter
we don't know how high. He also flew a
couple of his smaller pyro rockets on A
motors. Both went well.
So by the end of the day we were all
happy we had an excellent flight day and
didn't have rockets to repair at
the end of the day.
With the last 3 successful and repeatable
flights of the G2 we are now fully moving
forward with the second phase of the rocket. I'll
post progress updates on the development of
the boosters, and static tests for the
One of the projects I was working on
recently was to get the two highlights
videos finished from the June
launch in Perth. So I'm including them
here for completeness: