Search found 1592 matches

by Moonbogg
Sat Jun 06, 2020 2:16 pm
Forum: Combustion Cannons
Topic: Question regarding fueling, fan, and ignition.
Replies: 4
Views: 220

Re: Question regarding fueling, fan, and ignition.

I see what you're saying about the spark in the middle not doing much for performance. I saw a smartereveryday video where it actually resulted in some bad combustion effects toward the back, but he wasn't using metered fuel and it wasn't mixed, so it ran out of oxygen toward the back before fresh a...
by Moonbogg
Sat Jun 06, 2020 2:07 pm
Forum: Hybrid Cannons
Topic: I bring you some cannon performance data
Replies: 5
Views: 288

Re: I bring you some cannon performance data

jackssmirkingrevenge wrote:
Sat Jun 06, 2020 6:05 am
jimmy101 wrote:
Thu Jun 04, 2020 10:31 pm
Caliper in the fruit isle? Just take a little length of barrel!
"Security? Yeah it's that weirdo putting limes through a pipe again..."

Yeah, that wouldn't look good.
by Moonbogg
Fri Jun 05, 2020 3:12 pm
Forum: Combustion Cannons
Topic: Question regarding fueling, fan, and ignition.
Replies: 4
Views: 220

Re: Question regarding fueling, fan, and ignition.

I'd install the propane inlet at the end of the chamber where there is double thickness from the coupling as shown below. http://www.burntlatke.com/lp.html I'd put the fan at the far end as shown below. http://www.burntlatke.com/jpg600/fan-frictionmounted.jpg As far as the ignition, I'd install that...
by Moonbogg
Tue Jun 02, 2020 10:00 pm
Forum: Hybrid Cannons
Topic: Cooking up a little something...
Replies: 77
Views: 11968

Re: Cooking up a little something...

Final update. After putting hundreds of shots through this cannon I can declare it a complete success, for now. There are no compromises to speak of. I'll report again in some number of years on its long-term reliability. The piston works reliably and as intended. The performance of the cannon is be...
by Moonbogg
Tue Jun 02, 2020 6:28 pm
Forum: Pneumatic Cannons
Topic: Calculations related to pneumatic cannon.
Replies: 4
Views: 206

Re: Calculations related to pneumatic cannon.

It seems that Bernoulli's equation is typically used with incompressible fluids such as water, or gases where a constant density can be maintained which allows Bernoulli's equation to remain valid and useful. How can Bernoulli's equation be useful for a compressed air system where the potential ener...
by Moonbogg
Sun May 31, 2020 1:11 am
Forum: General How-To & Discussion
Topic: Extra powerful homemade weapon.
Replies: 3
Views: 307

Re: Extra powerful homemade weapon.

That thing is an absolute monster. It's amazing.
by Moonbogg
Sun May 31, 2020 1:08 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Hello, how's this?
Replies: 4
Views: 365

Re: Hello, how's this?

Nice gun! I never got into the small caliber creations, but maybe that will change sometime.
by Moonbogg
Sun May 31, 2020 1:06 am
Forum: Off-Topic Hobbies
Topic: My current hobby: Cowboy Action Shooting
Replies: 12
Views: 3035

Re: My current hobby: Cowboy Action Shooting

Nice! I too am surprised that there was an older gun at the range than yours. That's really cool that such old weapons are still around and being enjoyed for recreation. Glad you had a good time out at the range. My day went well too. I posted the data in a new thread in the hybrid cannon forum. I w...
by Moonbogg
Sun May 31, 2020 12:17 am
Forum: Hybrid Cannons
Topic: I bring you some cannon performance data
Replies: 5
Views: 288

I bring you some cannon performance data

I wanted to get more data but I ran into issues with the chrony giving error codes and getting knocked over from high winds. I also ran out of limes that fit the barrels too early because I was embarrassed to go into the market with my calipers. Next time I will bring the damn calipers and they can ...
by Moonbogg
Sat May 30, 2020 2:24 am
Forum: Off-Topic Hobbies
Topic: My current hobby: Cowboy Action Shooting
Replies: 12
Views: 3035

Re: My current hobby: Cowboy Action Shooting

Sweet! I'm going out Saturday as well to finally do some chrony readings on my cannons. We'll share our stories here I'm sure. That's a fantastic find you got there. Awesome mom!
by Moonbogg
Thu May 28, 2020 7:08 pm
Forum: Combustion Cannons
Topic: Propane failing to ignite reliably.
Replies: 9
Views: 461

Re: Propane failing to ignite reliably.

The first good combustion cannon that I built was powerful enough to make me crap my pants and it worked reliably. I made it out of ABS plastic pipe, but many use pressure rated PVC. The way I did it was I first researched the designs here and asked a bunch of questions. Take a look at over-under de...
by Moonbogg
Tue May 26, 2020 2:27 am
Forum: Combustion Cannons
Topic: Propane failing to ignite reliably.
Replies: 9
Views: 461

Re: Propane failing to ignite reliably.

I saw your other post. I see the oxygen bottle sitting there. I also see the igniter right next to the cannon with a short wire, meaning you have to be close to fire it. You are going to die. You can't use propane and oxygen in a PVC cannon. You are going to die or someone else is going to get mangl...
by Moonbogg
Tue May 26, 2020 2:22 am
Forum: Combustion Cannons
Topic: I was hoping for some feedback on my oxy-propane combustion cannon.
Replies: 7
Views: 395

Re: I was hoping for some feedback on my oxy-propane combustion cannon.

You built what we call a "hybrid" cannon. It uses a measured, pressurized mixture of propane and air and is then ignited. How do you keep the pressurized air and fuel in your chamber before igniting it? It typically requires a piston design or a burst disc. Also, pressurized fuel/air mixtures or oxi...
by Moonbogg
Fri May 01, 2020 9:39 pm
Forum: General How-To & Discussion
Topic: Canada prohibits spudguns over 20mm
Replies: 11
Views: 673

Re: Canada prohibits spudguns over 20mm

Why in the hell do governments feel the need to screw with people's hobbies? Spud guns? Really? They feel the need to tell people what kind of potato launcher to make or not make? GTFO.
by Moonbogg
Thu Apr 30, 2020 11:34 pm
Forum: Hybrid Cannons
Topic: Cooking up a little something else...
Replies: 8
Views: 523

Re: Cooking up a little something else...

However, what I am trying to avoid is running over the o-ring with any kind of holes to avoid shredding it over time Good catch. I'm excited about this project. It has double the surface area for flow from the port as my last one Even more surface area for lightweight discarding sabots. :mrgreen: I...