@Jimmy I would counterweight the rocket by filling the nose cone with clay or something easy to pack in there to that it flies straighter out of the barrel Don't fill the nosecone with clay as it'll make it nose heavy and even more likely to tumble/point down before ignition making it extremely dan...

ammosmoke wrote:How did you end up spending $600 on that?

Welcome to the UK, the place where everything costs shedloads more.

Very nice.

Mark,

M6 is the threaded rod size (M(etric) 6(mm))

The Tee is rated to 1.6MPa IIRC - 16bar.

I'm thinking for fittings around 4", which when your the other side of the pond they cost a bomb.

And if your careful then you won't bore out too much.

Best way is to cut the pipe off and then bore out the pipe very accurately on (ideally) a mill.

:lol: When you test something you want to test it above what you use it at regularly. A normal SG, when fired has a massive amount of shock on it. So when you test it you should put it under alot of shock as if your firing it. (I'm talking about chamber testing here) But only enough shock to test it...

<snip>@Gepard Increased shock isn't such a great idea, as it weakens the gun for the next time you use it. Although, what you are describing probably isn' that big a deal. <snip> I disagree I think for testing you should create as much as stress as possible short of damaging it. Everytime you fire ...

I test all my things at 125psi first time.....if you use water there's no risk and you can cycle the pressure much quicker which increases the shock to the materials.

or, you can just have your computer continuously change its IP address... My friend's uncle's computer changes its IP 5 times a minute. There is no way to track that... You can't change the web address of a permananent site. How would any other computer on the internet find your web site if it's ad...

How do you turn PVC into a plastic? Surely it already is.......

I'm building a twin 3in ported cannon now and the piston valves alone cost alot to make nevermind the sprinklers.

Some drills you can unscrew the chuck and screw on a small lathe chuck.....

Dunno which ones though.

What you trying to hold? And what size?

If you can hold it from the inside then you can use two blocks of wood and clamp a piece fo rubber between them. Then if you tighten it the rudder will hold the piece whilst the wood should take up the force.

Thanks guys,

Matt (sandman) will be doing the models and Jo's brother has said he'll provide the formulas for the simulating side of things. Just waiting on him now and then Matt and I can finish it.

Michael

Sub forum?


Length