last updated: 7th January 2017 - Day 180 Light Shadow and Polaron G2 flights

Safety First

Search

Site Index

Tutorials

Articles

Rocket Gallery

Labs

Where To Buy

10 Challenges

Links

Blog

Glossary

Contact Us

About


Construction - Basic

Body

Ring Fins

Flat Fins

Nozzle

Nosecone

Construction - Advanced

Robinson Coupling

Splicing Bottles #1

Splicing Bottles AS#5

Reinforcing Bottles

Side Deploy #1

Side Deploy #2

Mk3 Staging Mechanism

Multi-stage Parachutes

Fairings

Construction - Launchers

Gardena Launcher

Clark Cable-tie

Medium Launcher

Cluster Launcher

Launch Abort Valve

Quick Launcher

How It Works

Drop Away Boosters

Katz Stager Mk2.

Katz Stager Mk3.

DetMech

Dark Shadow Deployment

Articles

Recovery Guide

Parachutes

How Much Water?

Flying Higher

Flying Straight

Building a Launcher

Using Scuba Tanks

Nozzles

Video Taping Tips

MD-80 clone

Making Panoramas

Procedures

Burst Testing

Filling

Launching

Recovery

Flight Computer

Servo Timer II

V1.6

V1.5

V1.4

V1.3, V1.3.1, V1.3.2

V1.2

Deploy Timer 1.1

Project Builds

The Shadow

Shadow II

Inverter

Polaron G2

Dark Shadow

L1ght Shadow

Flight Log Updates

#180 - Light Shadow

#179 - Stratologger

#178 - Coming Soon

#177 - Reefing Chutes

#176 - 10 Years

#175 - NSWRA Events

#174 - Mullaley Launch

#173 - Oobleck Rocket

#172 - Coming Soon

#171 - Measuring Altitude

#170 - How Much Water?

#169 - Windy

#168 - Casual Flights 2

#167 - Casual Flights

#166 - Dark Shadow II

#165 - Liquid Density 2

#164 - Liquid Density 1

#163 - Channel 7 News

#162 - Axion and Polaron

#161 - Fog and Boom

#160 - Chasing Rockets

#159 - Measurement

#158 - Dark Shadow

#157 - Polaron G2

#156 - Foam Flights

#155 - Down The Barrel

#154 - Revisits

#153 - ClearCam

#152 - Mullaley, Axion G2

#151 - Competition Day

#150 - Rocket Salvos

#149 - Glide Fins

#148 - Too Windy

#147 - Descent Rates

#146 - G2 Launcher

#145 - Harness

#144 - Water vs Foam

#143 - Whalan Reserve

#142 - Doonside

#141 - Windy

#1 to #140 (Updates)

 

FLIGHT LOG

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 click the browser's BACK button to return back to the page.

 

Day 154 - Revisits
Date: 9th November 2014
Location:
Whalan Reserve, NSW, Australia
Conditions:
 Clear skies, light to moderate winds 5km/h-15km/h, ~28C
Team Members at Event:
PK, GK, John K and Paul K

Foam Generation with launch tube

We revisited a test from a couple of launches ago to do with generating foam during pressurisation with a 22mm nozzle and launch tube. We made sure there was no silicon grease on the launch tube this time. We also cut the launch tube down by about 5cm to make it easier to fill with water. The last attempt had the launch tube go almost all the way up to the bottle neck.


Pushing in the Clark cable tie launcher

Loading rocket onto the quick launcher

Securing in place

Foam was generated during pressurisation and did not collapse this time. This is an experiment leading up to a test to see if we can cool the air inside a rocket by filling it with foam. Due to the large surface area of the foam and water's capacity to absorb heat we are hoping the this will reduce the temperature inside the rocket due to compression heating.

We launched the rocket at 120psi, but it only managed to reach 391 feet. This was surprising as one would have expected that a launch tube and a 22mm nozzle would achieve better altitude than a 9mm nozzle and no launch tube at the same pressure.


Foam generation holes vent air
from air hose.
No air escapes through launch tube

Rocket was launched at 120psi

 

Large parachute deployment

We had another go with trying to deploy the large parachute using the large parachute deployment mechanism. Because there was a bit of wind we decided to put it only on a small rocket and launch it at a lower pressure of 80psi. In case it opened we didn't want it to drift too far. On the first launch we set the timer for 3 seconds and the pilot chute deployed right on cue. As it brought the rocket around and suspended it vertically, the nosecone was pulled free and the large parachute pulled out of the top of the rocket. The chute, however, failed to inflate, and the pilot chute brought the rocket to a safe landing. It didn't look like there was enough time to open fully.


Large chute deployment ready to go.

The chute failed to fully inflate

We set the rocket up again and this time filled it to 120psi. It flew considerably higher and again the pilot chute now set for 4 seconds opened right near apogee and again pulled the main chute out as designed. The main chute once again did not inflate.

We strongly suspect that once the rocket is under the pilot chute it is falling too slowly for the main chute to get enough air flow to inflate, We may need to separate the nosecone with the pilot chute away from the main parachute and the rest of the rocket.

We did fix the early deploy of the main chute though. This was achieved by having the main parachute packed so there was more friction between it and the body walls. The pilot chute string to the top of the nosecone was also tight which prevented the nosecone from separating on burnout.


Rocket falling too slowly under pilot
chute to fully inflate large chute

Second attempt also failed

Other than the two tests above we also flew 3 foam flights just for fun. Here are some photos from these launches. The rockets all landed well without problems.


 

 

 

 

 

 

Standing near foaming rockets can
give you and the car a quick wash.

Here is a highlights video from the day:

Flight Details

Launch Details
1
Rocket   Axion II
Pressure   120psi
Nozzle   22mm
Water   1500mL + foam
Flight Computer   ST II - 5 seconds
Payload   AltimeterOne, HD cam #16 V3
Altitude / Time   391 feet / 23.1 seconds
Notes   Good flight and good landing. Used the plugged launch tube.
2
Rocket   Axion II
Pressure   120psi
Nozzle   9mm
Water   1500mL + foam
Flight Computer   ST II - 5 seconds
Payload   AltimeterOne, HD cam #16 V3
Altitude / Time   479 feet / 31.7 seconds
Notes   Good flight and good landing.
3
Rocket   Axion II
Pressure   120psi
Nozzle   9mm
Water   1500mL + foam
Flight Computer   ST II - 5 seconds
Payload   AltimeterOne, HD cam #16 V3
Altitude / Time   429 feet / 26.7 seconds
Notes   Good flight and good landing.
4
Rocket   Axion II
Pressure   120psi
Nozzle   9mm
Water   1500mL + foam
Flight Computer   ST II - 5 seconds
Payload   AltimeterOne, HD cam #16 V3
Altitude / Time   480 feet / 27 seconds
Notes   Good flight and good landing.
5
Rocket   Axion III
Pressure   80psi
Nozzle   9mm
Water   800mL
Flight Computer   ST II - 3 seconds
Payload   Large chute deployment mechanism
Altitude / Time   ? feet / 9.4 seconds
Notes   Good flight and good landing. Main chute deployed but failed to inflate
6
Rocket   Axion III
Pressure   120psi
Nozzle   9mm
Water   800mL
Flight Computer   ST II - 4 seconds
Payload   Large chute deployment mechanism
Altitude / Time   ? feet / 24.7 seconds
Notes   Good flight and good landing. Main chute deployed but failed to inflate

 

<< Previous   Back to Top   Next >>



Copyright © 2006-2016 Air Command Water Rockets

Total page hits since 1 Aug 2006:

George Katz - Google Plus