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 118 - Polaron G2 flight and more
Filling with 4 liters of water.
Top section is screwed on.
Launched at 220psi.
(video frame grab)
Uses 16mm nozzle
(video frame grab)
Parachutes open past apogee.
Coming in nose first due to back up
parachute shock cord wrapped around rocket.
Having faced high acceleration and landing
the rocket now must deal with the eager recovery crew.
It's nice to get them back in one piece.
Always good to see new faces at the NSWRA
Launch crew in action.
Axion IV launched at 125psi. Cameraman
leaning too much.
27 seconds of air time.
This is what happens when you don't cover
your equipment on the ground and launch a rocket
with foam near it.
It's a tough job, but someone has to do it.
Getting Pod 2 ready to fly on a C6-5
Getting Paul's "Pod 3" ready....
... and launch....
Axion IV going for a second flight with
Packing up at the end of the day.
Conditions:25C, overcast light breeze
Team Members at Event:PK, John K, Paul K and
It has only been a week since the last
launch so we took the old Polaron G2
rocket for a spin. During the week I
replaced the FC V1.6 in the nosecone
with an STII timer as this is easier to
operate during launch. The V1.6 used a
separate remote-arm cord that needed to
be pulled before launch and then used
the G-switch to detect launch. With the STII we used the break wire option to
detect launch and so there is no need
for a separate arming action.
In the backup deploy mechanism, the
power switch on the prototype STII
was faulty and because I didn't have a
spare one I decided to make one of those
simple screw switches. They are very
easy to make, lightweight, easy to
mount, and will not accidentally turn
off due to vibration or things moving
I made ours from an off-cut from an old
PCB, and simply soldered a nut to one
side. I also put a thick layer of solder
on the contact area so that when you
tighten the screw it digs into the
solder for a good contact.
We extended the G2b rocket by a spliced quad
to get the original full length G2 rocket
as we first flew it back in
Jan 2011 with
the inline deploy mechanism,
Because of the issues with the #16
camera we taped the older #11 to the
side. I am still waiting for the higher
class SD cards to see if that will fix
the problem with the #16.
Setup was straight forward and again we
filled up the lower half of the rocket
on the pad first with 4 L of water and
then screwed on the top section. Because
the new spliced quad had not been
pressure tested yet we decided to launch
the rocket at a lower 220psi just to be on the
Timer delay was set for 8 seconds which
was a little past apogee for this
pressure, but at least it also gave the
back up uMAD deployment a chance to fire.
It's better that the rocket comes down
under 2 parachutes than on 1. If we
deploy the main too early and the rocket
stays pointing up, the uMAD never
The rocket took off fast and again made
a lot of noise as it powered up into the
sky. You can never get tired of the higher
pressure launches :). The rocket flew
fairly straight, although it did roll a
little bit. It pitched over nicely at
apogee and deployed the backup parachute
as designed, shortly followed by the
main. As the main deployed it twisted
the rocket body around and wrapped the
back up parachute shock cord once around
the body of the rocket. This had the
effect of moving the back up parachute attachment point
further down the rocket, and as a result
the rocket came down with nose
angled towards the ground rather than
tail first. The rocket landed well
though in the grass without any damage.
The altimeter recorded 726 feet (221m) which
was considerably less than what the simulator had
I'm not sure why that was, but perhaps
due to increased drag from the parachute
door? I don't think there was a leak on
the rocket, at least we couldn't hear
one from where we were standing.
Because the rocket drifted too close to
the trees again due to the wind
direction, we decided not to launch the
We launched the Axion IV rocket a couple of
times using foam. It's always fun to
watch the slow launches as the rocket
accelerates. These were only
pressurised to around 120psi.
Paul also decided to build himself a
water rocket from the spare parts we
bring along for each launch. Within 10
minutes he assembled himself "Pod 3" and
launched it. He also managed to fly 3 of
his pyro rockets on the day and get them
all back, so he was a happy.
What about progress on Shadow 2? ....
more on that in the next update. :)
The heavily overcast conditions made it
really poor for filming and photography.
Here is a highlights video from the day:
Flygon (Paul's Aspire)
Altitude / Time
? / ? seconds
flight with streamer deployed just
past apogee. It went high.