[Public-List] Air cannon?

[Michael]

My Daughter bought a potato cannon over the internet for some high 
school science project-with my credit card. I still have it someplace. 
PVC, uses a fire system/water sprinkler valve for a trigger (that kind 
of valve is an immediate open/shut), it's caliber is actually tennis 
ball. Charged up with 150 lbs of air, well, let's just say I wouldn't 
want it aimed at me. That could be regulated by charging pressure.
The project involved students demonstrating non chemical projectile 
delivery systems-trebuchets, catapaults etc. I don't think air cannons 
were considered in the list of possibilities. The physics teacher's 
quote was, after demonstrating, "Sarah, you are going to get me fired".
Anyway, if you want to give it a shot (pun not really intended) I can 
look for it. You'll need 1/2 dozen tennis balls or so to dial in the air 
pressure, I wouldn't plan on recovering the balls unless a big open 
field is involved (or dingy recovery boat), and an air compressor. It 
holds air for more than one shot, and it doesn't take a whole lot of air 
volume (I think one of those 12 volt car compressors would do it). 
Accurate enough to scare the begeesus out of something to about 75 
yards, I'd say. Total range a lot more than that.
Michael Grosh
#220

------ Original Message ------
From: "George Dinwiddie via Public-List" 
<public-list at lists.alberg30.org>
To: "George Dinwiddie via Public-List" <public-list at lists.alberg30.org>
Cc: "George Dinwiddie" <gdinwiddie at alberg30.org>
Sent: 5/1/2022 8:18:23 PM
Subject: Re: [Public-List] Air cannon?

>Hmmm...
>This looks interesting:  https://youtu.be/ggotO37Kw4w?t=20
>And this has the necessary range:  https://youtu.be/GHiTDsFTFQQ?t=30
>
>:-)
>
>
>On 5/1/22 7:53 PM, George Dinwiddie via Public-List wrote:
>>Hmmm... The range is only 50 feet. I wonder what I could do to extend that.
>>
>>On 5/1/22 7:42 PM, Patricia Meinhold via Public-List wrote:
>>>Airzooka.  See Amazon.
>>>
>>>>On May 1, 2022, at 7:30 PM, George Dinwiddie via Public-List <public-list at lists.alberg30.org> wrote:
>>>>
>>>>Pat, what is it called?
>>>>
>>>>- George
>>>>
>>>>>On 5/1/22 7:11 PM, Patricia Meinhold wrote:
>>>>>There is a kids toy that does just that.
>>>>>>>On May 1, 2022, at 7:08 PM, George Dinwiddie via Public-List <public-list at lists.alberg30.org> wrote:
>>>>>>
>>>>>>As I watch an osprey eat his dinner at the top of my mast, I wonder if I could build a cannon that shoots a puff of air that might encourage him to seek a different picnic table. I only need a range of a couple hundred feet.
>>>>>>
>>>>>>Any ideas?
>>>>>>
>>>>>>- George
>>>>--
>>
>
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>   When I remember bygone days                         George Dinwiddie
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