Search found 1679 matches

by ramses
Fri Jun 20, 2008 11:50 am
Forum: Ammo & Parts
Topic: Ammo Ideas
Replies: 359
Views: 4002306

-5/8" steel rebar in a sock to keep from messing with your barrel/ make sure it doesn't tumble.
-balloons filled with water/ ketchup
-roll of aluminum foil with
-all with wadding

the aluminum foil in particular worked well. at the peak of it's trajectory, it began to unroll and drifted down nicely.
by ramses
Thu Jun 19, 2008 3:24 pm
Forum: Off-Topic Hobbies
Topic: Best place 2 be in zombie uprising! (in term of spudgunning)
Replies: 201
Views: 28537

WOW!! wrote: Mcmasters, because there is one 5 mins away from me.
lucky!

I'd be in a nuclear missile silo.

spud-related, maybe spudtech HQ if they had steel ball bearings the diameter of ping pong balls for his uber-vortex gun...

or BCARMS...
by ramses
Thu Jun 19, 2008 3:12 pm
Forum: Off-Topic Hobbies
Topic: Airsoft Artillery?
Replies: 87
Views: 16388

i like the idea with the oxy-propane balloon, but i think that it could use some improvement. first, having the fuse lit while loading it seems a little unsafe. i attached a rough diagram detailing my idea. it could be made of whatever material you like. pad it if you want. i know you are all thinki...
by ramses
Thu Jun 19, 2008 10:06 am
Forum: General How-To & Discussion
Topic: ignitor position
Replies: 11
Views: 2299

i know you were talking about combustions, but i have a somewhat related idea about hybrid ignition. if the spark is at the front, the flame travels to the back until the chamber pressure exceeds the burst disk. then the unburned fuel flows to the barrel, pushing the flame front back and burning slo...
by ramses
Thu Jun 19, 2008 9:27 am
Forum: Off-Topic Hobbies
Topic: Fuel Prices in Your Area
Replies: 91
Views: 15314

Yeah but it would be way cooler if the hybrid cars actually worked like a conventional spudding hybrid. indeed, but doesnt a turbo or supercharger do that? I am not sure, I am not a mechanic yes it does, but normal cars are hybrids already. i think around 8x. so i think turbo's bump that to around ...
by ramses
Thu Jun 05, 2008 1:11 pm
Forum: Hybrid Cannons
Topic: assorted hybrid questions
Replies: 26
Views: 4240

right now, i was going to use around 500psi, which it tells me around 800 psi peak What the hell does that mean? If you fuel to 500psi, I can guarantee you that the combustion pressure will be far in excess of 800psi. Try something more like 3.5k, or more. yeah, i have to agree that that doesn't ma...
by ramses
Wed Jun 04, 2008 2:08 pm
Forum: Hybrid Cannons
Topic: assorted hybrid questions
Replies: 26
Views: 4240

but for 15x with oxygen, I'd only need 30psig since the air is only ~21% oxygen. still, that's another tank, another high accuracy gauge, another component to manipulate, and probably a buttload more money. i think I'll go to SCH 80 instead... edit: i decided to go with a 2"x18" chamber. will cost a...
by ramses
Wed Jun 04, 2008 9:28 am
Forum: Hybrid Cannons
Topic: assorted hybrid questions
Replies: 26
Views: 4240

ok, maybe 15x was a little excessive... a lot. in HGDT, you're right, it can reach 1.7kpsi if i use a 1.7kpsi burst disk. right now, i was going to use around 500psi, which it tells me around 800 psi peak. i know HGDT is inaccurate (especially because it thinks the stoichiometric ratio for MAPP is h...
by ramses
Tue Jun 03, 2008 2:53 pm
Forum: Off-Topic Hobbies
Topic: Needle Pencil
Replies: 7
Views: 1838

what else would he do with a piezo in the back of a pen at school?
by ramses
Tue Jun 03, 2008 12:49 pm
Forum: Hybrid Cannons
Topic: assorted hybrid questions
Replies: 26
Views: 4240

i am about to just give up and go with copper, but how can i attach this to threaded steel? could I just solder it into a steel female threaded coupling and expect it not to blow off? if not, how is this done? also, just to make sure is 2" sch40 welded steel okay for a 15x MAPP/propane-air chamber, ...
by ramses
Sat May 31, 2008 1:51 pm
Forum: Hybrid Cannons
Topic: assorted hybrid questions
Replies: 26
Views: 4240

King- I'm going into highschool next year, and can't take any electives that year (and they won't MAKE me take shop). I could have older students do it, but my school has an anal non violence, hurting people, gun=bad mindset, and I'm not sure I'd trust people just learning how to weld learning on so...
by ramses
Sat May 31, 2008 10:41 am
Forum: Hybrid Cannons
Topic: assorted hybrid questions
Replies: 26
Views: 4240

unfortunately, i lack a welder. Welded steel is the way to go in this case. Why would you need a welder? There are plenty of welding shops out there that would be willing to do it for a very minimal fee, especially if you tell them what you're building. fair enough, but sometimes welded fittings ar...
by ramses
Fri May 30, 2008 5:17 pm
Forum: Hybrid Cannons
Topic: assorted hybrid questions
Replies: 26
Views: 4240

Arn't you on 4HV? Wouldn't a PVC barrel work? killjoy used PVC on FEAR. yep, 3kj induction launcher in the works 8) the one thing i was worried about with a PVC barrel was the mechanical stress on the fitting connecting it to the chamber. 10' of pipe acting as a lever on a little plastic fitting mi...
by ramses
Thu May 29, 2008 8:07 pm
Forum: Hybrid Cannons
Topic: assorted hybrid questions
Replies: 26
Views: 4240

assorted hybrid questions

Hi, I have a few questions about hybrid construction. 1) I was looking at using a 3" diameter steel chamber of undetermined length. McMaster doesn't have high pressure 3" to whatever reducing couplings. The highest I can find is 150psi malleable steel. I think my gun may push 650psi, according HGDT ...