Launch Day 2

Launch Day: 2
Date: 20/07/08 Afternoon
Location: Montview Oval
Rockets: SRT II

The goal of our second launch day was just to have fun and fly the rocket without blowing it up, which we successfully did. We did have a water leak in the nozzle and had to make a quick dash back home to repair it, although it didnt take long.

We were at the oval for about 2 hours and had about 15 successful launches. We also had some of marks soccer team friends come over and have a launch as well.

We decided to only launch at max 50psi as we didnt want to go beyond that and risk an explosion. Also there was no additional weight in the nosecone and it flew fine.

Below are a few pics from the day

SRTII on the pad

SRTII on the pad

Just the spray .. too slow the camera

Just the spray .. too slow on the camera

You can see from this pic that there is a small design flaw with my wooden stake pad stability :) When the release string is pulled too hard the pad tilts and the rocket takes off at an angle. This is something we will fix for the next launch day.

Here is a shot we got of takeoff, you can see the rocket going off at an angle and the spray going up from the launch tube.

SRT II Launch closeup

SRT II Launch closeup

This version of our launcher doesnt have a one way valve inline, so the water gets back in the line when not under pressure, but also the length of the launch tube is about 12m, so at launch you can see the pressure push up a column of water from the launcher.

We probably launched to about 30m, hard to say, the nosecone held up pretty well, the cap was cracked but nothing that cant be fixed.

A great afternoon of water rockets was had.

Things we learned:

  • Our reinforcement of the bottom held fine at 50psi
  • Styrofoam nozzle seals will leak .. better get some rubber ones
  • Need to have better stability of the launcher
  • Got to get quicker on the shutter of the camera :)
  • The cutouts on the fins worked well. Easy to access the nozzle with your fingers when placing the rocket on the pad
  • Take some more tools with us to the launch days

This entry was posted on Sunday, July 20th, 2008 at 9:33 am and is filed under Launch Days. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.


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