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 42 users online :: 3 registered, 0 hidden and 39 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

10X Hybrid golfball launcher

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

Unread postAuthor: mobile chernobyl » Tue Jun 15, 2010 6:41 pm

Some more photos of the gun including:

-Honing the union to "screw easy"

-and a hint at the spark strip design...
  • 0

Attachments
IMG00374-20100615-1837.jpg
IMG00375-20100615-1839.jpg
IMG00373-20100615-1836.jpg
IMG00371-20100615-1836.jpg
IMG00370-20100615-1758.jpg
IMG00376-20100615-1854.jpg
User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: kydavies » Tue Jun 15, 2010 6:47 pm

nice work ive always wanted to build a hybrid but i dont have access to proper materials or machining
  • 0

mikemurph wrote:yea, the ammo has been changed to a more aero dynamic projectile. it consists of the back half of a dart, and a hot glue ball
AHahahahah!!
User avatar
kydavies
1st Lieutenant
1st Lieutenant
 
Posts: 258
Joined: Thu Apr 22, 2010 9:09 pm
Location: Comox BC
Reputation: 0

Unread postAuthor: mobile chernobyl » Tue Jun 15, 2010 6:49 pm

Yea I really only have a cheap abrasive saw, grinder and files to do this lol. Oh yea and a Tig welder... I guess that kinda helps.

If I had access to a mill and lathe this gun would look like poo compared to what I could make lol.
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: kydavies » Tue Jun 15, 2010 6:56 pm

wow i still have nothing compared to you (tool wise).

all i have is a drill, a hacksaw, 2 files and duct tape
  • 0

mikemurph wrote:yea, the ammo has been changed to a more aero dynamic projectile. it consists of the back half of a dart, and a hot glue ball
AHahahahah!!
User avatar
kydavies
1st Lieutenant
1st Lieutenant
 
Posts: 258
Joined: Thu Apr 22, 2010 9:09 pm
Location: Comox BC
Reputation: 0

Unread postAuthor: mobile chernobyl » Tue Jun 15, 2010 6:58 pm

Depending on where you live, yardsales (if your not from the US, they are basically people selling extra stuff they have in their house, and it's usually in their garage, driveway or yard that they display the "junk") are a great way to pick up used tools very cheap, esp if you've got some bartering skillz...
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: Moonbogg » Tue Jun 15, 2010 8:15 pm

Whoa, awesome project here! I love to see stuff like this. I check this site like every day hoping to see something that is inline with my own taste, and that doesn't happen often at all, but this nailed it hard. Can't wait to see this thing really get going. Nice modeling btw. Thats the way to go man.
  • 0

User avatar
Moonbogg
Major General
Major General
 
Posts: 1375
Joined: Mon Oct 13, 2008 10:20 pm
Location: whittier, CA USA
Reputation: 0

Unread postAuthor: kydavies » Tue Jun 15, 2010 10:38 pm

i live in Canada (BC) but im moving soon so i got to keep my spudding low for now. also im moving 2 blocks away from a reuse it center for building supplies :blob: lots and lots of cheap plumbing parts!!!!!
  • 0

mikemurph wrote:yea, the ammo has been changed to a more aero dynamic projectile. it consists of the back half of a dart, and a hot glue ball
AHahahahah!!
User avatar
kydavies
1st Lieutenant
1st Lieutenant
 
Posts: 258
Joined: Thu Apr 22, 2010 9:09 pm
Location: Comox BC
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: mobile chernobyl » Tue Jun 15, 2010 11:14 pm

Thanks Mr. Bogg - Your creations have definitely been an inspiration for undergoing this project, mostly the fact that you made the striker with no major machinery!... something I'll unfortunately be forced to do with this as well.

All modeling was done in photoworks 360 - SolidWork's proprietary rendering software... What do you use for yours?
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: Moonbogg » Wed Jun 16, 2010 12:44 am

mobile chernobyl wrote:Thanks Mr. Bogg - Your creations have definitely been an inspiration for undergoing this project, mostly the fact that you made the striker with no major machinery!... something I'll unfortunately be forced to do with this as well.

All modeling was done in photoworks 360 - SolidWork's proprietary rendering software... What do you use for yours?


Same program. Solidworks 2009 professional. I love it for fiddling around with cannon designs. I don't use the photoview 360 but use the photoworks right in the solidworks interface (same thing either way). Good luck and i'll be watching you!
  • 0

User avatar
Moonbogg
Major General
Major General
 
Posts: 1375
Joined: Mon Oct 13, 2008 10:20 pm
Location: whittier, CA USA
Reputation: 0

Unread postAuthor: mobile chernobyl » Wed Jun 16, 2010 12:44 am

Updated spark strip info.

Here is the model, it consists of:

a 1/4NPT X 1/4"Tubing compression fitting, bored through

The inner rod is 3/32 316 welding filler rod,

surrounded by 5/32 PE tubing (perfect ID fit for the filler rod! couldn't resist),

Finally with 2.15" sections of 1/4" x .035" wall 316L tubing - spaced .16" between each to provide a spark gap.

The rear portion extends back far enough away to avoid creating a shorter gap for the spark strip to cheat from.

The overall in chamber length of the spark strip is appx. 12", with 6 spark gaps.

Fiddling with the HGDT has show us that 6 gaps will provide 300FPS gains over 1 gap, whether or not this is true... I can not yet verify. But if I could even get the 1 gap FPS results from the HGDT lets just say I'll be pretty happy!

The trickiest part will be sealing the rear most's 1/4" tubing gap between it's ID and the 5/32" OD which, if you do the math, provides for a .015" gap (before compression fitting crushes the 1/4" tubing lol). I was thinking some sort of RTV or silimar silicone would be well suited for the 2300*C flash at 8ms long, and 1000+PSI pressure spikes? Sorta sounds like a car engine lol... :roll:

Oh yea the render...
  • 0

Attachments
Spark strip.jpg
User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: Moonbogg » Wed Jun 16, 2010 12:48 am

That render looks real as hell. Nice job. Multi spark gaps allow some peace of mind by making sure you get the most out of your combustion. Hybrid or not, I am all for multi spark if possible.
  • 0

User avatar
Moonbogg
Major General
Major General
 
Posts: 1375
Joined: Mon Oct 13, 2008 10:20 pm
Location: whittier, CA USA
Reputation: 0

Unread postAuthor: mobile chernobyl » Wed Jun 16, 2010 12:54 am

Haha thanks, I never really got to utilize my computer's power to it's true potential before messing around with render settings. I can do that render in a 1024 size at best quality in appx a minute. my overclocked Q9450 3.2Ghz @ 4 cores is handy for that kind of stuff since a render program actually utilizes all 4 cores.
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: mobile chernobyl » Thu Jun 17, 2010 11:37 am

I thought about making a new thread for this, but I'll just post it here.

It's a PDF on Ultrons CLGG developement. For those who don't know what CLGG tech is - it's pretty much the correct terminology for our "hybrids" except we're not using a true light gas for the fuel.

http://www.dtic.mil/cgi-bin/GetTRDoc?AD ... tTRDoc.pdf


I especially like the folding skirt design... it's patent pending but for hobby use - personal observational use on private owned property... ahh you get the idea.

enjoy :D
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: Technician1002 » Thu Jun 17, 2010 11:56 am

Great stuff in the PDF.. I'll have to finish reading it later. I got to the pressure wave containment my ignition locations and energy. The modeling of the pressure waves and control of DDT with buffer is great stuff. Unfortunately, I'll have to finish later. Thanks for the PDF.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: SpudFarm » Thu Jun 17, 2010 12:02 pm

mobile chernobyl wrote: I was thinking some sort of RTV or silimar silicone would be well suited for the 2300*C flash at 8ms long, and 1000+PSI pressure spikes?


Epoxy should do that perfectly.

This is a nice build, a good balance between power and function. I am looking forward to seeing this gun done and loaded.

Not much to say otherwise, seems as you have got it all under control. Makes me want to build a mid sized hybrid though..

Good luck.
  • 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

PreviousNext

Return to Hybrid Cannon Discussion

Who is online

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

Reputation System ©'