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 69 users online :: 5 registered, 0 hidden and 64 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

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

The Team
Administrators
Global Moderators
global_moderators.png CS

another question on piston hybrid.

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
Sponsored 
  • Author
    Message

another question on piston hybrid.

Unread postAuthor: pat123 » Sat Apr 05, 2008 11:51 am

how would i put the small pipe in the tee? would I just screw the barrel in half way and screw the pipe the piston seals against in from the other side?

would that much force (planning on doing about 5X) break the top of the tee?
  • 0

Attachments
hybrid piston design.JPG
hybrid piston design.JPG (12.57 KiB) Viewed 914 times
User avatar
pat123
Colonel
Colonel
 
Posts: 514
Joined: Sat Dec 23, 2006 10:08 pm
Location: S.C.
Reputation: 0

Unread postAuthor: SpudFarm » Sat Apr 05, 2008 11:53 am

you are confusing me
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: pat123 » Sat Apr 05, 2008 11:57 am

The blue pipe in the diagram. how would i get it in there?
  • 0

User avatar
pat123
Colonel
Colonel
 
Posts: 514
Joined: Sat Dec 23, 2006 10:08 pm
Location: S.C.
Reputation: 0

Unread postAuthor: Pilgrimman » Sat Apr 05, 2008 12:04 pm

The way I do it is I just put primer on the inside of the bushing that goes in the tee, and then I put primer on the pipe where you want it to touch the female part of the bushing. To get the pipe through, you have to get rid of the inner lip on the bushing so that the pipe can go all the way through. The next thing I did was put PVC glue on the bushing, and slide the pipe through until the part with primer was in the bushing. Then I dabbed some glue next to it, and let capillary action do the work!
  • 0

Yeah, we wouldn't want to anger the bees, now would we??

I HATE YOU BEES! I HATE YOU BEES! I HATE YOU BEES!

LMAO Classic!!!! I love Family Guy!
User avatar
Pilgrimman
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 481
Joined: Thu Jun 28, 2007 1:10 pm
Location: Grants Pass, OR
Reputation: 0

Unread postAuthor: Jared Haehnel » Sat Apr 05, 2008 12:04 pm

That should work however I don't know if your going to be able to screw the barrel in that far....

But let me get your design straight your making a piston hybrid? The fittings are generally the weakest part...
  • 0

My current projects....

Currently buying part for...
http://www.spudfiles.com/forums/my-new- ... rt,15.html
Still on the drawing board...
C02 tank hybrid
Screen doors for submarines...
User avatar
Jared Haehnel
Colonel
Colonel
 
Posts: 611
Joined: Tue Feb 19, 2008 4:15 pm
Location: White River Jct, Vermont
Reputation: 0

Unread postAuthor: pat123 » Sat Apr 05, 2008 12:09 pm

@Pilgrimman- it is all steel.

@Jared-Do you think it will hold that much pressure. i don't want steel shrapnel.
  • 0

User avatar
pat123
Colonel
Colonel
 
Posts: 514
Joined: Sat Dec 23, 2006 10:08 pm
Location: S.C.
Reputation: 0

Unread postAuthor: Jared Haehnel » Sat Apr 05, 2008 12:17 pm

Some else should either second this or say I'm wrong but I think (if I remember correctly) steel is good to at least 5x...
  • 0

My current projects....

Currently buying part for...
http://www.spudfiles.com/forums/my-new- ... rt,15.html
Still on the drawing board...
C02 tank hybrid
Screen doors for submarines...
User avatar
Jared Haehnel
Colonel
Colonel
 
Posts: 611
Joined: Tue Feb 19, 2008 4:15 pm
Location: White River Jct, Vermont
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: pat123 » Sat Apr 05, 2008 12:18 pm

I was also thinking about somethng like this
  • 0

Attachments
straight piston hybrid.JPG
straight piston hybrid.JPG (13.19 KiB) Viewed 901 times
User avatar
pat123
Colonel
Colonel
 
Posts: 514
Joined: Sat Dec 23, 2006 10:08 pm
Location: S.C.
Reputation: 0

Unread postAuthor: pat123 » Sat Apr 05, 2008 12:19 pm

in a normal hybrid most of the force is going straight but in the top design most of the force will be slamming directly into the side of the tee.
  • 0

User avatar
pat123
Colonel
Colonel
 
Posts: 514
Joined: Sat Dec 23, 2006 10:08 pm
Location: S.C.
Reputation: 0

Unread postAuthor: Jared Haehnel » Sat Apr 05, 2008 12:45 pm

Thats a pretty good design...I like it... the only thing you might have trouble with is when the spring closes you might accidentally cut off you flow or at least limit it enough to limit performance...
  • 0

My current projects....

Currently buying part for...
http://www.spudfiles.com/forums/my-new- ... rt,15.html
Still on the drawing board...
C02 tank hybrid
Screen doors for submarines...
User avatar
Jared Haehnel
Colonel
Colonel
 
Posts: 611
Joined: Tue Feb 19, 2008 4:15 pm
Location: White River Jct, Vermont
Reputation: 0

Unread postAuthor: Killjoy » Sun Apr 06, 2008 2:05 am

I built a piston valve hybrid (yet to post, still has issues). But I built the valve in a 2" steel tee and then threaded a 2" long 1"pipe nipple into the back of a 2"-1" threaded bushing. I got it in there pretty tight, and then reinforced it and sealed it with regular and the stick stuff epoxy.

in a normal hybrid most of the force is going straight but in the top design most of the force will be slamming directly into the side of the tee.

Your thinking linearly. A normal hybrid, when the mix is ignited it cause the pressure to rise almost instantly (with a slight variance), so the pressure or "force" as your referring to it is applied almost equally on all parts of the hybrid, and the tee as well.

The pressure does not "slam", It just rises in a very small time frame, applying almost equal force to all parts of the hybrid.
  • 0

Stanford Class of 2012

"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill

Killjoy
Brigadier General
Brigadier General
 
Posts: 1053
Joined: Sun Nov 12, 2006 12:51 am
Location: New Mexico
Reputation: 0

Return to Hybrid Cannon Discussion

Who is online

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

Reputation System ©'