Archive for October, 2010


Updated Launcher – High Pressure Components

Next on the list was upgrading the launcher with metal connectors and high pressure hose.  We upgraded the following

– replaced the gardena quick release on the abort extension hose to a male Nitto connector
– replaced the  first gardena quick release on the launcher with a Nitto Female quick release
– replaced the poly hose on the launcher with high pressure hose (290 psi)
– replaced the poly  90 degree elbow with a metal 90 degree elbow with bards

The abort extension hose was the first to be updated and now all connections are Nitto air hose connectors, the male Nitto connector was added to the end. The barbed section goes into the hose.

Nitto Male Hi Cupla Std 30PH

Added Nitto male to end of abort hose (to connect to launcher)

The brass elbow was fitted into two sections of high pressure hose, one section has a Nitto female connector to connect to the abort extension hose, the other end has a gardena quick release to connect to the rocket nozzle.

90 Degree Brass Elbow with barbed connections

This section effectively converts from air hose connectors to gardena quick release.

High Pressure converter from Nitto Air hose to Gardena connector

We have managed to find a female gardena connector that has a barbed connection on the hose side. This barbed connection goes 30mm down into the hose and ensures there is  more space for the clamp to hold the hose to the  gardena connector.  At the moment there is only about 8mm-10mm of the gardena connector down inside the hose, so there is a chance it might  fly off under high pressure.  We  ordered the barbed one in from our local irrigation supply store, so we will probably replace the one we have on the launcher prior to the next launch with the new one once it comes in.

The high pressure hose and connectors were mounted back on the movable section of the launcher, strapped to the steel rod and screwed down.

High Pressure Hose mounted back on the launcher

All the sections  were connected up for a test and no leaks.  This configuration is upgraded to the high pressure hose and connectors from the pump to the launcher, here is a picture of all the sections connected

All sections of upgraded launch system

This current launch system lets us position the abort valve 5m from the launcher and the pump another 15m back from that if required for high pressure launches and tests. We will do a high pressure test of the hoses and connectors in this configuration without a bottle to ensure the system can hold without any leaks.

Posted by on October 28th, 2010 2 Comments

Updated Abort System – High Pressure Components

Abort System Upgrade
Our next launch day of the rocket car will be with the reinforced bottle stack and a launch pressure of approx 150-170 psi. With this in mind we have

– added 5m of high pressure hose to move the abort system back further  from the launcher
– replaced the lower pressure hose with the 290psi high pressure hose
– replaced the plastic T piece with a metal one and metal joiners
– mounted the hose and valve to a piece of wood for better stability when operating

Updated Abort System

The Abort extension hose has the Gardena quick release on the end of it currently as the launcher uses this for its quick release,  this will be replaced with a nitto quick release when the launcher is updated with the high pressure hose and connectors (this is the next planned  update).

Extended Hose and Gardena Quick Release

The T piece has  three 1/4″ BSP threaded male connectors. Each of the hose connections uses a barbed female 1/4″ BSP connector. The barbed section of the connector fits down into the hose and is clamped. The female threaded section screws on to the male connector of the T piece,  teflon tape was used to stop any leaks. The hoses are secured to the board with 15mm saddles .

Metal T Piece and connectors

Accurate Distance Measurement
We would like to get a accurate measurement of the next launch distance as (fingers crossed) it hopefully will be our longest yet. We have invested in a 50m tape measure to mark out the road with 10m increments as accurately as possible.

50m Tape Measure

50m tape measure

Posted by on October 27th, 2010 Comments Off

HHWRSA WebServer Relocated

Our webserver was relocated today to a new data centre. The move went well with minimal downtime.

The Internet link is about 3 -4 times faster than our previous one so page loading times should be improved :)

Posted by on October 22nd, 2010 Comments Off