Search found 265 matches

by King_TaTer
Fri May 24, 2013 10:17 pm
Forum: Combustion Cannons
Topic: Advanced Cannon: The Breechloading 70mm
Replies: 12
Views: 5403

It's always refreshing to see a great looking advanced combustion. Well done. I like the military green look. Have you considered multiple spark gaps in your chamber? Such a large chamber would definitely from more than one. I can't wait to see the damage video and watch that mule kick. Once again, ...
by King_TaTer
Sun Apr 28, 2013 11:22 pm
Forum: Combustion Cannons
Topic: need help
Replies: 4
Views: 1247

Welcome to Spudfiles! Now on to your cannon... Well, it looks like it functions well. Where's your barrel? What sorts of things do you shoot out of it? I'm guessing that unpainted bell reducer contains the chamber fan? What sorts of challenges did you face along the way? You see what I'm getting at ...
by King_TaTer
Sun Apr 28, 2013 10:57 pm
Forum: Combustion Cannons
Topic: Could Use Some help With My Gun's Ratios
Replies: 4
Views: 852

1. Find the volume of your barrel of desired length 2. Multiply this by 1.5 to get the chamber volume 3. Divide this by the cross sectional area of your chamber 4. Bingo, chamber length has been found. Now you're going to have to compensate for the irregularly shaped volume between the chamber pipe ...
by King_TaTer
Sat Apr 27, 2013 5:28 pm
Forum: General How-To & Discussion
Topic: Help building my first cannon
Replies: 13
Views: 966

If you were to go with a combustion, the C:B ratio can be anywhere between 0.8:1 (the chamber is 80% the volume of the barrel) and 1.5:1 (the chamber is 150% the volume of the barrel). It all depends if you've got a barrel or chamber volume that is fixed. Let's say you've got a 5 foot length of pipe...
by King_TaTer
Wed Apr 24, 2013 10:38 am
Forum: SpudFiles Discussion
Topic: SF is dying
Replies: 71
Views: 7054

Also still lurking every now and then. I've got plans for this summer though, we'll see if the bank account holds up till then...

Oh, and SF will never die. It's too unique and contains an intelligent community unlike SOOO many other forums out there.
by King_TaTer
Mon Oct 08, 2012 2:09 am
Forum: Off-Topic Hobbies
Topic: The Slingshot Channel Thread
Replies: 1168
Views: 63442

Always great works of engineering from you Joerg, keep it up. This episode was rather comical which was very fitting considering your ammo choice and launcher design. Well done.
by King_TaTer
Thu May 10, 2012 6:01 pm
Forum: Pneumatic Cannons
Topic: So, whos is in northern Illinois?
Replies: 4
Views: 364

We've already got two threads on fellow spudder locations I think. However I can't seem to find either of them. I'm sure other members will chime in with the links to them.
by King_TaTer
Wed May 02, 2012 6:56 pm
Forum: Pneumatic Cannons
Topic: Questions on 2.5 inch barrel tennis ball cannon
Replies: 22
Views: 11728

The two 90° elbows and the bell reducer on your chamber are definitely DWV. You can tell by the socket depth. As far as your 3" chamber goes, if you thought it was DWV then why did you use it? If it does not read NSF-PW in red or black ink along the side of the pipe, it is unsafe. You may be dealing...
by King_TaTer
Sat Apr 14, 2012 6:59 pm
Forum: Combustion Cannons
Topic: newbie planning to go all out :-)
Replies: 112
Views: 6749

I would have to agree that the volume of the meter should be taken into account no matter what. On the other hand let's not forget about what causes inaccuracies in practice, not on paper. 1. Chamber and Meter irregularities. Sure you can do a fluid measurement but how sure are you that it's accurat...
by King_TaTer
Sat Apr 14, 2012 3:45 pm
Forum: Combustion Cannons
Topic: newbie planning to go all out :-)
Replies: 112
Views: 6749

That doesn't make sense. If you have a 20mL meter at 1 bar, that's the same amount of gas as a 10mL meter at 2 bar. You can use lower pressure, but to make up for the lower pressure you need a higher volume which ends up amounting to the same amount of gas, assuming a constant mix. I'm aware of thi...
by King_TaTer
Sat Apr 14, 2012 3:06 pm
Forum: Combustion Cannons
Topic: newbie planning to go all out :-)
Replies: 112
Views: 6749

ah.. yes of course :-).. but is it so that the less pressure u have, the more gas is left inside the measuring tube ? or are we talking about marginals not worth calculating ? Not sure what you're asking here but it seems like you're worried that if the meter is too large it might throw off your mi...
by King_TaTer
Wed Apr 11, 2012 3:00 pm
Forum: Hybrid Cannons
Topic: 75SD 3/4" hybrid with integral suppressor
Replies: 62
Views: 17993

Aww, you should have went for the head! :D But impressive nonetheless. Pic of the new suppressor?
by King_TaTer
Tue Mar 06, 2012 11:29 pm
Forum: SpudFiles Discussion
Topic: Easter Challenge (Jelly Bean)
Replies: 45
Views: 4538

Are we talkin' Plywood or Particle board?
by King_TaTer
Tue Oct 18, 2011 1:04 pm
Forum: Ammo & Parts
Topic: m-40 (marking round) added photos
Replies: 15
Views: 2351

What bore size? Combustion or Pneumatic?
by King_TaTer
Thu Nov 04, 2010 9:58 am
Forum: Combustion Cannons
Topic: Most common mistakes on first advanced combustion cannon?
Replies: 18
Views: 1692

Is this your fist time building a cannon? Do you know how to identify pressure rated PVC pipe and fittings? How much money are you willing to spend? Just a few questions for you to consider. Try and figure out exactly what you would like to do and how simple or complex you want your cannon to be. Th...