aluminum nozzle test-delay test

This is a test to show that a metal nozzle, aluminum or steel can be threaded into pvc without melting the casing. Also testing a new delay grain ejection design.

The Thai machinist made the exit too wide and too long so I never fired this nozzle. I have since had them make steel nozzles with the right size and shape which flew great. The purpose of this test is to mere show that the pvc can be protected from the heat of the metal.

Category:

Science & Technology

Tags:

• rocket motor
• pvc
• rocketry

[randy12368]

Aluminum is lighter than steel, as you already know, but because the aluminum will abate what is the thinest one could go with steel to get the weight down on your nozzle?

[rocketmanbkk]

@randy12368 : If you look at the steel nozzle it is very thin at the bell. You could core out some steel on the back side to lighten it up I guess. The weight is the one downfall of using steel.

[420hooray]

Is there any online store where I can get a nozzle like this?

[rocketmanbkk]

@420hooray : You would need a machine shop to lathe it for you. I recommend making them out of concrete with a steel washer imbedded.

[donperry1]

@rocketmanbkk Hey guy, are you still around?

[420hooray]

@rocketmanbbk alright but I think there's a machine shop in my town so I'll see if they'll do it and if not I'll just use concrete.

[rocketmanbkk]

@beginization : if you are just doing amateur rocketry you really don't need a De Laval nozzle. A simple straight hole will work for standard applications.

[beginization]

@rocketmanbkk I just realised that you may use cement to keep it balanced or does it not matter what the weight is at the bottom of rocket to stop it turning over

[beginization]

@rocketmanbkk Ceramic would be lighter than cement

[beginization]

@rocketmanbkk I would like to get into rockets but am not rich but am a ceramic artist so could make my own nozzles to save money, does the shape matter