A better search term is "stainless steel union," or some other metal name. Try that.

I respectfully disagree. I think that temperature is the key quantity. Even using the term "a sufficiently small quantity" seems to undermine your own argument, since the temperature of x moles of matter with y joules of heat added is determined by the ratio y/x. As y/x gets larger, higher temperatu...

What about housing a retrieval system in the nose and leaving the body hollow, as in JSR's successful design?

I need to calculate the resistance of an oxide layer in a circuit, but the resistivity of the oxide layer is highly dependent on the electric field strength (see here). I'm unfamiliar with this problem. How do I calculate the strength of the electric field at the oxide layer?

I'm using 7.0.9, which was released in 2005 and I got this computer a few months ago so... Yeah. No idea where this issue is coming from. Here's a screenie:

Dang that'd be amazing if it flies straight. Lots of wasted brass though Should have used crimped Al fins, and epoxied it all together.

Like seriously, I'm going to be trying making some projectiles with that crimping method, it's genius.

I also used a staring temp of 300K... but I just checked my list of reactants and realized I stuck in 1.3moles of C₄H₆. Wait... just ran simulation again, no change as a result. I'm still getting 13.048atm and 1,638.5m/s SOS. With the SOS I just produced, wouldn't it be more pr...

Just to interject: I'm home on break for a few days, and my dad picked up a free knife by these guys at a conference while I was at uni, I'll post pics and specs when I get my hands on it. Seems interesting, no?

I think we just found that my simulation is slightly superior to DYI's :D Did you include all species including oxygen and nitrogen, the HO radical, and all hydrocarbons with 4 or less carbons? I just re-tried the simulation, maxed out the product species, .23 butane gives me 13.016atm, hardly a mea...

Some math ahead of time would have been nice for this experiment :P, Could have saved JSR a log of machining. Linear mass density of the Al rod: .0234g/mm Linear mass density of the Delrin: .04g/mm Linear mass density of UHMWPE: .027g/mm The hollow aluminium rod clearly wins, especially with the cri...

That was aimed more at Labtec, but okay

Those look amazing. Are the ones with a longer tail section notably more stable? And I notice that JSR's version two with the aluminium body/tail has a shorter nose/head than the Delrin version. That may have been what made the biggest difference, especially if the Al has a greater linear mass densi...

Did you try the mix that I suggested?

What are the dimensions on that aluminium rod? How does the linear mass density compare to that of UHMWPE or Delrin? I think you'd want to continue trying to use plastics; I'm pretty sure aluminium rods (hollow or not) will get pricey... Can Tungsten be machined using ceramic machining tools? I'm th...

Because Tungsten's more dense than both Not sure if you noticed but this whole purpose of this thread is to design a cheap and simple low drag ammo I don't think tungsten is cheap and probably it isn't easily machinable Prices should be right here Tungsten appears cheaper than uranium... or you cou...