Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 37 users online :: 4 registered, 0 hidden and 33 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

The Mr.Plow PPP Wannabe

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

Unread postAuthor: drac » Thu Apr 28, 2005 12:57 pm

Yes. Smaller chmabers equal less pumping time, larger ones mean more pumping and less PSI, the most Ive ever gotten it with a foot pump is about 125, so it's a relatively small chamber.
  • 0

User avatar
drac
Moderator
Moderator
 
Posts: 916
Joined: Sun Apr 24, 2005 8:56 am
Location: North Collins, NY
Country: United States (us)
Reputation: 2

Unread postAuthor: julz » Fri Apr 29, 2005 4:19 pm

well wih my chamber, about 85 cubic inches i can only get up to 60 psi, then i cannot get any further. any ideas?
  • 0

User avatar
julz
Sergeant Major
Sergeant Major
 
Posts: 178
Joined: Mon Apr 18, 2005 12:54 am
Location: australia
Reputation: 0

Unread postAuthor: drac » Fri Apr 29, 2005 5:20 pm

Ahh, there's the thing. My chamber is only 13 cubic inches, plus i work out (narcissim at its greatest) so it isn't hard to pump it up, untill my arms get tired. If you made it smaller that would make it easier to pump up. Plus, it might help if the bike pump cylinder is well oiled. A dry seal can really decrease how much air you can pump in., Try squirting some DW40 on the rod when you pump it(that came out wrong), it helps. I did that to my bike pump which was my dads from 30 years ago and it works like a charm.
  • 0

User avatar
drac
Moderator
Moderator
 
Posts: 916
Joined: Sun Apr 24, 2005 8:56 am
Location: North Collins, NY
Country: United States (us)
Reputation: 2

Unread postAuthor: julz » Sat Apr 30, 2005 1:48 am

Drac wrote:...on the rod when you pump it(that came out wrong)
hehe :lol: :lol:
any way, turns out i bought a dodgey pump. it broke today so i swapped it for a hand pump that get up to 100psi in about 30 goes. man, my mate and i were shooting aat 40psi before we returned the pump and we thought it was awesome but S.H.I.T!! it is good now :D it sounds like a gun it so fre.akin.g loud now and it managed to shoot a spud 100m verctically up in the air. now i just have to add a silencer and laser sight :) .
thanks Drac,
---Julz
  • 0

User avatar
julz
Sergeant Major
Sergeant Major
 
Posts: 178
Joined: Mon Apr 18, 2005 12:54 am
Location: australia
Reputation: 0

Unread postAuthor: drac » Sat Apr 30, 2005 9:35 am

Glad to hear that it works. 100 meters vertical huh? I can barely get that with 125 on mine with a small dowel bit. That's good. Is the silencer going to be just for looks, because it really wont help to make a pneumatic quiter.
  • 0

User avatar
drac
Moderator
Moderator
 
Posts: 916
Joined: Sun Apr 24, 2005 8:56 am
Location: North Collins, NY
Country: United States (us)
Reputation: 2

Unread postAuthor: julz » Mon May 02, 2005 11:07 pm

well i supppose it may not have been 100m. my mate and i reckon it got there but it may have been only 70-80 or something like that. :roll: i did add a silencer that i made, just holes, wrapped tightly with ols fabric and then duct tape. this takes away the loud crack that used to be with it and now it is just a muffled bang. a bit like a car door slamming hard. laser is not far off, just for kicks :) then a gb barrel and aemi auto! :P
---Julz
ps. you guys here at Spudfiles are great! thanks for all the help!
  • 0

User avatar
julz
Sergeant Major
Sergeant Major
 
Posts: 178
Joined: Mon Apr 18, 2005 12:54 am
Location: australia
Reputation: 0

Unread postAuthor: drac » Tue May 03, 2005 7:01 am

:lol: Glad to help. I like the semi auto idea. How do you plan on making it? A tee with bolt action or something like that?
  • 0

User avatar
drac
Moderator
Moderator
 
Posts: 916
Joined: Sun Apr 24, 2005 8:56 am
Location: North Collins, NY
Country: United States (us)
Reputation: 2

Sponsored

Sponsor
 


Unread postAuthor: julz » Thu May 05, 2005 1:40 am

atm i have no idea. i guess i'll look around and . AAAAHH! brainwave!

what about multiple smaller chambers, say five, arranged in an easy to handle shape, with each one feeding into the same barrel through an individual valve(solenoid). then a breech loading clip like that on the peacemaker, then five seperate buttons that each open a seperate solenoid, allowing one shot, clip load, 2nd shot, clip load etc. how about it? this owuld be expensive but still i would love the idea of a semi auto cannon with five shots per clip.
damn! i have to save up now :D
what do u reckon bout that?
--Julz

edit. here is a crappy pic
  • 0

Attachments
semiauto.JPG
User avatar
julz
Sergeant Major
Sergeant Major
 
Posts: 178
Joined: Mon Apr 18, 2005 12:54 am
Location: australia
Reputation: 0

Unread postAuthor: drac » Fri May 06, 2005 12:12 pm

What I would suggest is having a large chamber filled through a ball valve. It gives better flow than a tire valve. ONe valve is good enough and save money. For the breech loader (from the looks of it) will be gravity fed? Or will you use something similar to a bolt? Sorry for asking two questions, I'm just slow at understanding things.
The multiple chamber design sounds cool, but I still think that one chamber would be a bit more efficient.
  • 0

User avatar
drac
Moderator
Moderator
 
Posts: 916
Joined: Sun Apr 24, 2005 8:56 am
Location: North Collins, NY
Country: United States (us)
Reputation: 2

Unread postAuthor: julz » Fri May 06, 2005 2:17 pm

the breech loading wouls have a spring at the top, pushing down the ammo.
sorry, i dont understans the other question. the reason i had 3 chambers is because each one would be worth one shot, if i had one big chamber i would only get one shot, then have to pump it again.

see the True-Semi thread.
---Julz
  • 0

User avatar
julz
Sergeant Major
Sergeant Major
 
Posts: 178
Joined: Mon Apr 18, 2005 12:54 am
Location: australia
Reputation: 0

Unread postAuthor: drac » Fri May 06, 2005 4:26 pm

Oh I get it. But three chambers would be veru cumbersome. Maybe making a stand for it would help you aim it. As for the big chamber, I see. What I though was that the valve would stop when you let go of the blowgun or got your hand of the switch, and leave some air in the chamber.
  • 0

User avatar
drac
Moderator
Moderator
 
Posts: 916
Joined: Sun Apr 24, 2005 8:56 am
Location: North Collins, NY
Country: United States (us)
Reputation: 2

Unread postAuthor: julz » Sat May 07, 2005 1:16 am

oh ok. but you would have still have had to pump again cos the pressure would drop more and more as you took more shots. i hope to begin production as soon as i get more money, about 2-3 months.
---Julz
  • 0

User avatar
julz
Sergeant Major
Sergeant Major
 
Posts: 178
Joined: Mon Apr 18, 2005 12:54 am
Location: australia
Reputation: 0

Unread postAuthor: tatorassassinator » Fri May 13, 2005 4:35 am

[quote="drac"]

I can't use sprinkler valve because they are not available in my area.


Order on off the internet! I had a ball valve on my cannon and it launched pvc rockets a quarter mile and i switched to a sprinkler valve and now it shoots Almost a half mile. They are well worth the buy.
  • 0

My mommy says im special.


My cats breath smells like catfood.
User avatar
tatorassassinator
Private
Private
 
Posts: 22
Joined: Wed Apr 27, 2005 4:04 pm
Location: Waubay south dakota
Reputation: 0

Unread postAuthor: drac » Fri May 13, 2005 6:16 pm

To be honest, I don't like ordering online. Besides, I live in the city so the power offered by a ball valve is perfectly fine for me.
  • 0

User avatar
drac
Moderator
Moderator
 
Posts: 916
Joined: Sun Apr 24, 2005 8:56 am
Location: North Collins, NY
Country: United States (us)
Reputation: 2

Previous

Return to Pneumatic Cannon Database

Who is online

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

cron
Reputation System ©'