Posted: Tue Jul 30, 2013 4:56 pm
Page 119 of 165
Posted: Tue Jul 30, 2013 5:01 pm
That looks a bit basic for someone of your experience, is there something radical inside you're not telling us about?
Posted: Tue Jul 30, 2013 8:24 pm
Collapsible Travel Combustion. Clever 
Posted: Tue Jul 30, 2013 11:31 pm
Ah yeah, I see now. Dur. That's pretty neat.
Posted: Wed Jul 31, 2013 12:35 am
Try explaining it to the TSA thoughGun Freak wrote:Collapsible Travel Combustion. Clever
Posted: Wed Jul 31, 2013 8:13 am
Compact Potato Transporter
Posted: Mon Aug 26, 2013 9:55 am
In the world of spuds today:
Sabot design, shear skirts, and 3/8" tungsten carbide ball bearings.
(That's 10mm plate).
I didn't do much work on gas dynamic guns this summer, but I put together this little toy hybrid from spare parts and stock. I might post on it in a month or so, as it has some relatively novel features. It was my first attempt at implementing shear skirt projectiles, and has worked out well enough to encourage further experimentation at a later date. Unfortunately, that later date is almost two years away. Fortunately, I've finally started on that quasi-1D gun model in my sig.
Sabot design, shear skirts, and 3/8" tungsten carbide ball bearings.
(That's 10mm plate).
I didn't do much work on gas dynamic guns this summer, but I put together this little toy hybrid from spare parts and stock. I might post on it in a month or so, as it has some relatively novel features. It was my first attempt at implementing shear skirt projectiles, and has worked out well enough to encourage further experimentation at a later date. Unfortunately, that later date is almost two years away. Fortunately, I've finally started on that quasi-1D gun model in my sig.
Posted: Mon Aug 26, 2013 11:44 am
now you have my attention awesome!
So the sabot is also the "burst disk"?
What mix were you shooting at?
awesome!So the sabot is also the "burst disk"?
What mix were you shooting at?
Posted: Mon Aug 26, 2013 3:03 pm
Eehm..10mm steel plate??
That would've been considered armour in WW1..?
What kind of beast have you created?!?!
Oh...and I really like looking at your skirt...and holes....
The damaged brass fitting...not so much...
That would've been considered armour in WW1..?
What kind of beast have you created?!?!
Oh...and I really like looking at your skirt...and holes....
The damaged brass fitting...not so much...
Posted: Mon Aug 26, 2013 4:01 pm
The shear skirt is incorporated into the base of the sabot, yes. It's not shown in the FEA output though.jackssmirkingrevenge wrote:So the sabot is also the "burst disk"?
What mix were you shooting at?
This was with 2.75 : 7.24 propylene / oxygen at a pre-ignition pressure of 12.8 bar (absolute pressure - the nitrogen content was ~ 0.1% due to pre-shot purging with propylene). The targeted maximum pressure was 4500psi.
@Brian:
It's steel plate, but not nearly so hard as would have been used for armour. I wouldn't call this a beast - it's a little over half as energetic as a 12 gauge shotgun firing slugs.
The brass fitting isn't really damaged - the sealing faces and bore are very smooth, and the barrel connection is sound. It's just ugly on the outside.
Incidentally, this breech can seal in both directions. Any guesses on why that is?
Posted: Mon Aug 26, 2013 4:05 pm
I wonder...DYI wrote:Incidentally, this breech can seal in both directions. Any guesses on why that is?
Posted: Mon Aug 26, 2013 4:26 pm
Got it in one. I didn't budget enough time to finish the second stage. Had I completed it, performance would have been similar to that of the electric gun I posted two years ago (which is currently out of commission due to a fairly impressive transformer explosion... ).
).Posted: Tue Aug 27, 2013 12:46 am
Brian the brain wrote:Oh...and I really like looking at your skirt...and holes
Got it in one. I didn't budget enough time to finish the second stage.
*fap fap fa...
Can't wait to be surrounded with the sort of wilderness that allows this sort of expermintation
No correspondingly impressive footage?Had I completed it, performance would have been similar to that of the electric gun I posted two years ago (which is currently out of commission due to a fairly impressive transformer explosion).
Posted: Tue Aug 27, 2013 6:57 am
The cameras were focused on the test apparatus, not the charging system.jackssmirkingrevenge wrote:No correspondingly impressive footage?
The footage goes like this: *60Hz hum* ... *ominous hissing noise* ... "Hmm, I wonder what's making it do th- *screen whiteout* *BOOM* ... "[expletives deleted]".
Posted: Tue Aug 27, 2013 7:59 am
He's alive, he's actually alive.
WB DYI, nice work
WB DYI, nice work