How to Construct a Bait Cannon for Surf Fishing - Pensacola Fishing Forum

Go Back   Pensacola Fishing Forum > General Discussion > General Discussion

Like Tree5Likes
  • 2 Post By ST1300rider
  • 1 Post By catchenbeatsfishen
  • 1 Post By 60hertz
  • 1 Post By huntnflorida
Reply
 
Thread Tools Search this Thread Display Modes
Old 05-09-2019, 07:28 AM   #1
Senior Member
Snapper
 
MathGeek's Avatar
 
Join Date: Mar 2012
Location: Monument, Colorado
Posts: 421
Default How to Construct a Bait Cannon for Surf Fishing

__________________
“Which of you, if your son asks for bread, will give him a stone? Or if he asks for a fish, will give him a snake? If you, then, though you are evil, know how to give good gifts to your children, how much more will your Father in heaven give good gifts to those who ask him!" - The Messiah
MathGeek is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 05-09-2019, 09:39 AM   #2
Senior Member
Trigger
 
Join Date: Apr 2017
Location: Pensacola
Posts: 210
Default

You've officially reached the ranks of "spammer" when you repost the same exact video.

https://www.pensacolafishingforum.co...ishing-872441/

What does the bible say about spammers?
ST1300rider is offline   Reply With Quote Quick reply to this message
Old 05-09-2019, 05:01 PM   #3
Senior Member
Snapper
 
MathGeek's Avatar
 
Join Date: Mar 2012
Location: Monument, Colorado
Posts: 421
Default

Quote:
Originally Posted by ST1300rider View Post
You've officially reached the ranks of "spammer" ...
You'll be spamming those redfish with bait slugs if you build a bait cannon, that's for sure.
__________________
“Which of you, if your son asks for bread, will give him a stone? Or if he asks for a fish, will give him a snake? If you, then, though you are evil, know how to give good gifts to your children, how much more will your Father in heaven give good gifts to those who ask him!" - The Messiah
MathGeek is offline   Reply With Quote Quick reply to this message
 
Old 05-09-2019, 05:16 PM   #4
Member
Ruby Red Lip
 
Join Date: Nov 2007
Posts: 66
Default PVC with compressed air is a bad idea

PVC pipe can explode under pressure from compressed air. It doesn't just crack or split, it undergoes explosive failure.

If that thing gets clogged it could lead to a very bad day.

Here is a link to an article about the subject:

https://aircompressorworks.com/pvc-p...ing-to-happen/
Yellow River Cat likes this.
catchenbeatsfishen is offline   Reply With Quote Quick reply to this message
Old 05-10-2019, 09:04 AM   #5
Senior Member
Snapper
 
MathGeek's Avatar
 
Join Date: Mar 2012
Location: Monument, Colorado
Posts: 421
Default

Quote:
Originally Posted by catchenbeatsfishen View Post
PVC pipe can explode under pressure from compressed air. It doesn't just crack or split, it undergoes explosive failure.
"If you're not careful with that thing, you can put your eye out." Like most fun stuff, there are always ways for the careless to hurt themselves. Does everything need a thousand warning labels and disclaimers?

The launcher in the video was made with PVC rated for 300 psi even though it was only used at 80-100 psi. It was made with careful compliance with the published safety guidelines in Gurstelle's book, "Backyard Ballistics" and other reliable published sources relating to PVC potato cannons. Our PVC supplier was fully aware of our intended use of the materials and showed no concern and issued no warnings. They frequently use the material themselves for in-house cannon and launcher projects. We've been making cannons for over 15 years and never had a problem. Nor have we ever seen a failure documented when using 300 psi pipe and Gurstelle's safety guidelines up to a maximum of 100 psi.

We have seen numerous documented failures using weaker pipe, higher pressures, poor assembly techniques, and (especially) combustion cannons using mixtures with added oxygen. Oxy-acetylene is the most common cause of failures with PVC.
__________________
“Which of you, if your son asks for bread, will give him a stone? Or if he asks for a fish, will give him a snake? If you, then, though you are evil, know how to give good gifts to your children, how much more will your Father in heaven give good gifts to those who ask him!" - The Messiah
MathGeek is offline   Reply With Quote Quick reply to this message
Old 05-10-2019, 10:21 AM   #6
Member
Ruby Red Lip
 
Join Date: Nov 2007
Posts: 66
Default

Yep...this is an old geezer saying "be careful there young fella".
There is a difference between pressure rating for liquids and for compressed air.
Liquid does not compress under pressure, and expand when pressure is removed suddenly, like compressed air.
This is an OSHA memo on the use of PVC for compressed gas systems.

https://www.osha.gov/dts/hib/hib_data/hib19880520.html

That is the end of my public service message....
catchenbeatsfishen is offline   Reply With Quote Quick reply to this message
Old 05-10-2019, 02:17 PM   #7
Senior Member
Sailfish
 
60hertz's Avatar
 
Join Date: Oct 2007
Location: Pace
Posts: 2,271
Default

Quote:
Originally Posted by MathGeek View Post
"If you're not careful with that thing, you can put your eye out." Like most fun stuff, there are always ways for the careless to hurt themselves. Does everything need a thousand warning labels and disclaimers?

The launcher in the video was made with PVC rated for 300 psi even though it was only used at 80-100 psi. It was made with careful compliance with the published safety guidelines in Gurstelle's book, "Backyard Ballistics" and other reliable published sources relating to PVC potato cannons. Our PVC supplier was fully aware of our intended use of the materials and showed no concern and issued no warnings. They frequently use the material themselves for in-house cannon and launcher projects. We've been making cannons for over 15 years and never had a problem. Nor have we ever seen a failure documented when using 300 psi pipe and Gurstelle's safety guidelines up to a maximum of 100 psi.

We have seen numerous documented failures using weaker pipe, higher pressures, poor assembly techniques, and (especially) combustion cannons using mixtures with added oxygen. Oxy-acetylene is the most common cause of failures with PVC.
I might mount one of these on my Hobie to shoot boats that come too close.
Snagged Line likes this.
60hertz is offline   Reply With Quote Quick reply to this message
Old 05-10-2019, 05:03 PM   #8
Senior Member
Grouper
 
huntnflorida's Avatar
 
Join Date: May 2008
Posts: 1,081
Default

I’m not a surf fisherman but I like it! I’m a safety third kinda guy who likes fire, things that go boom, boobs, testosterone, danger, fireworks, alcohol, you get the idea...
John B. likes this.
huntnflorida is offline   Reply With Quote Quick reply to this message
Old 05-11-2019, 10:22 PM   #9
Senior Member
Snapper
 
MathGeek's Avatar
 
Join Date: Mar 2012
Location: Monument, Colorado
Posts: 421
Default

Quote:
Originally Posted by catchenbeatsfishen View Post
This is an OSHA memo on the use of PVC for compressed gas systems.
How many things we do fishing might have trouble getting approval from an overbearing government bureaucracy like OSHA?

I'm something of a student of all the ways folks hurt and kill themselves in recreational activities. Dihydrogen monoxide is the biggest killer. Yet most every adult I see boating does not have a life jacket on. Want to make a meaningful public service message, start there. Most other accidents resulting in needed medical care or death involve alcohol and the operation of motor vehicles. Being studious and diligent to avoid those gotchas, most injuries among my fishing buddies over the years have been due to ordinary falls and sharp things - hooks, fins, teeth, and the like. In the long term, skin cancer from sun exposure is the big risk.

The bait launcher project was advised by a number of engineers and scientists with impressive credentials. One engineer does consulting work for a prominent company in the field of failure analysis. This company does a lot of work looking into pressure-related material failures. Three scientists on the project have published papers on the subject of PVC projectile launchers. The trade-offs between PVC, steel, aluminum, and other materials were discussed in some detail. The concerns raised regarding PVC were found to be exaggerated as applied to the 300 psi rating in a system having a 100 psi peak pressure. Combinations of over pressure and material degrading over time can make any pressure vessel fail, and several team members routinely investigate failures in various materials. Steel and aluminum fail at least as often as PVC when materials degrade or when design pressures are exceeded.

The greatest risk of injury from PVC-based launchers built and maintained properly remains direct impact of projectiles with humans. Using a different material does nothing to mitigate this. These things are dangerous. Don't point them at people.
__________________
“Which of you, if your son asks for bread, will give him a stone? Or if he asks for a fish, will give him a snake? If you, then, though you are evil, know how to give good gifts to your children, how much more will your Father in heaven give good gifts to those who ask him!" - The Messiah
MathGeek is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pensacola Fishing Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
How Did You Find Us?
Tell us how you heard about Pensacola Fishing Forum.

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to Construct a Bait Cannon for Surf Fishing MathGeek General Discussion 0 12-19-2017 08:00 PM
July Fishing Tournaments/Events List asago General Discussion 0 07-06-2009 02:55 PM
PV Mexico fishing report dec 24th to dec 31st PELAGIC PIRATE Offshore Reports From Out Of The Area 4 01-06-2009 05:21 PM
posted this last year... COBIA !!! long read thanks Capt. Joe Richard doubleheader Offshore Fishing - General Q & A 0 12-28-2007 11:45 PM
USCG stops commercial boat using grouper for bait markw4321 General Discussion 7 12-24-2007 02:35 AM



All times are GMT -4. The time now is 05:10 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 RC 2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.