Search found 1679 matches

by saefroch
Sun Oct 30, 2011 11:44 am
Forum: Hybrid Cannons
Topic: 3042 Cubic Inch Hybrid WORKS!
Replies: 34
Views: 10135

McMaster-Carr item numbers 48855K16 and 6803K17 both fit the bill if you find a good way to connect two of them. You'll require a barrel support no matter what you use.
by saefroch
Sat Oct 29, 2011 8:33 pm
Forum: Off-Topic Hobbies
Topic: "Offtopic-posts-topic" NSFW
Replies: 6637
Views: 1393369

Figure getting 150K miles from a car. That's even a conservative estimate, as I'm discovering. My dad has put over 160,000 miles on a 2000 Toyota Avalon, the most significant repair it's needed yet is a replaced front strut, but beyond that regular maintenance and a lack of reckless driving have so...
by saefroch
Thu Oct 20, 2011 4:47 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: A Few Questions
Replies: 15
Views: 3015

Regulators ensure only that the pressure on one side is not allowed to rise too high through the regulator. They shut off flow when pressure on one side reaches a preset pressure. CO<sub>2</sub> has one drawback against air, the SOS, but you're probably not concerned with that for this application. ...
by saefroch
Thu Oct 20, 2011 9:28 am
Forum: Ammo & Parts
Topic: long range ammo MiniBoy Mark I
Replies: 591
Views: 86284

You could just put it in a sugar or salt container for transport.... to the untrained viewer they are much the same.

I'm not suggesting that you try to illegally transport any sort of controlled or regulated substance.
by saefroch
Tue Oct 18, 2011 9:15 am
Forum: Off-Topic Hobbies
Topic: AC Fan
Replies: 17
Views: 4306

The issue with the chimney right now is that there is not enough draw to get all the smoke to go up the chimney. It just goes backwards into the house, and fills the downstairs with smoke. Not pleasant. What are these mysterious windings? Are they just inductors that need to be in series with the AC...
by saefroch
Mon Oct 17, 2011 7:14 pm
Forum: Hybrid Cannons
Topic: Rich Oxygen/Fuel Mixes
Replies: 6
Views: 2080

Soot can exists as a suspension in a gas, with little bits of solid carbon. These can be filtered out, and removed. Therefore, one can in theory burn hydrocarbons in very heavy mixes and leave <b>most</b> of the carbon still sequestered as solid, not as greenhouse gases or pollutants.
by saefroch
Mon Oct 17, 2011 7:04 pm
Forum: Off-Topic Hobbies
Topic: AC Fan
Replies: 17
Views: 4306

The fireplace draws in from the room.... but that's moot if I need circuit elements :( I chopped them off and recycled them all.

Could this fan run on DC? Is that what the windings are for, rectifiers?
by saefroch
Mon Oct 17, 2011 6:30 pm
Forum: Hybrid Cannons
Topic: Rich Oxygen/Fuel Mixes
Replies: 6
Views: 2080

I am VERY interested in this topic. I read an article a while ago that mentioned a 45% fuel efficiency increase by using laser spark plugs to ignite heavy methaine:air mixes. You could also probably get away from greenhouse gases and leave the carbon as a solid... But that's a different topic.
by saefroch
Mon Oct 17, 2011 6:26 pm
Forum: Off-Topic Hobbies
Topic: AC Fan
Replies: 17
Views: 4306

What is a gable fan? I'm sure I could purchase and install one, but that costs money... and this could be free. Tech, it seems like you drew inductors, which leaves me horribly confused. Is it even possible to wire this up with just a switch and a capacitor, or do I need other elements from the orig...
by saefroch
Mon Oct 17, 2011 2:06 pm
Forum: Off-Topic Hobbies
Topic: AC Fan
Replies: 17
Views: 4306

I'd have to reverse it to draw air up, no? I could try wiring it backwards...
by saefroch
Mon Oct 17, 2011 12:13 pm
Forum: Off-Topic Hobbies
Topic: AC Fan
Replies: 17
Views: 4306

AC Fan

I want to install an AC fan on top of my chimney to improve the draw so we can actually use it in winter. I figure this fan even on the high setting probably won't draw more power than the heat pump and associated fan, so we should save money! Only trouble is that it comes from the same device I got...
by saefroch
Sun Oct 16, 2011 1:04 pm
Forum: General How-To & Discussion
Topic: Butane/Oxygen/Hydrogen mix?
Replies: 38
Views: 8151

So as the pump is concerned, so long as the copper piping comes after the check valve, there will be no effect upon dead volume. There is some really thin copper piping you can get, probably 1mm, that would work well.
by saefroch
Sat Oct 15, 2011 4:59 pm
Forum: General How-To & Discussion
Topic: Butane/Oxygen/Hydrogen mix?
Replies: 38
Views: 8151

You'd just pump the gases into the long thin copper piping, using a pump like the one I built.
by saefroch
Sat Oct 15, 2011 1:54 pm
Forum: General How-To & Discussion
Topic: Butane/Oxygen/Hydrogen mix?
Replies: 38
Views: 8151

Wikipedia says the autoignition for the stoichiometric mix of hydrogen and oxygen is 570C or 1,065F. I think you'll be safe, but feel free to throw some numbers at it first. I also note that you appear to have been playing around with GasEq for an extended period of time before taking that screensho...
by saefroch
Fri Oct 14, 2011 7:55 pm
Forum: General How-To & Discussion
Topic: projectile testing - any volunteers?
Replies: 139
Views: 25430

A style of arrow: I doubt that this was actually stable in flight, seeing how much it bent upon impact with the target. It looks like it was tumbling, but then suddenly stopped upon hitting the wood, but the back end kept rotating. EDIT: En anglais, on dit "lathe" pour la chose qu'on utilise pour u...