u/BCE_BeforeChristEra

Security will not try to stop you, but vehicles are not allowed in the building.

Were probably the last generation to have heard that specific sound.

cost breakdown is:
$65.83 pannier mounts - ebay shipped from india - arrived 2 weeks ahead of schedule
$90.80 aluminum boxes - ebay - shipped from us.
$10 sheet metal for mounting brackets. bolts saved from previous projects.
several hours screwin about trying to turn sheet metal into mounting brackets and drilling holes in the wrong spots.

total $167 and at least 5 hours of embarrassingly unskilled labor.

One must ask, why does the SCP do what they do? Its easy to understand why they contain the dangerous stuff, but some harmless interesting natural phenomena? One must imagine them to be like an HOA, it just doesn't fit their aesthetic.

Theres no load data for this thing.

I figured i'd start at 10 grains, then 15, and 20. Yes 10 and 15 grains are much too small for a 12 gauge. I was curious. When I pulled the 10 grains shotshell out of my gun a bunch of unburnt powder spilled onto my hand.

The dart and the sabot together weigh about 24 grams or 370 grains. The sabot is made out of PLA.

I filmed the three shots I took. https://youtu.be/xadKHpBwxjw?si=s85M4kaVVx9fZBd-

A while ago I made a post showing only one of the cavities filled. Lots of you suggested heating the mold more and cutting an air channel.

I did that. the first pour the graphite mold was probably hotter then the zinc I was putting into it. When I poured, the zinc filled only one cavity and the metal seeped right out the air channel at the bottom of the mold. The cavity was only half full when I opened the mold.

Subsequent colder pours I eventually figured out the cavities that were getting filled were the ones directly under the pour. Those openings were under the most pressure.

Holding the Crucible an inch or two higher really helped. under this method I got the only pour that filled all 4 cavities.

I think I need more "riser height". Pascals law asserts that liquid zinc higher up will exert more pressure and fill the mold better.

P.S. the air channels made all the zinc darts very pointy and painful to handle. I might try to fill them back in with refractory cement. I didn't think the zinc could fill them since I was careful to make the air channels very shallow.

hey better 1 then none right?

After a big shipping delay my graphite molds finally came in.

I had hoped to make lots of these zinc darts. My father calls them "little bombs" (their not)

Perhaps I'll be sanding the entrances to make the zinc flow in better. what do you guys think?