Keith’s Propane Injected ECL 1400

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
User avatar
sv490665
Private 4
Private 4
Posts: 73
Joined: Tue Sep 05, 2006 11:15 am

Wed Sep 20, 2006 3:01 am

Hey everybody, check out my new combustion launcher. Here's the specs, tell me what you all think, and please rate this gun if you get a chance, thanks!

Name: ECL 1400 (Economy Combustion Launcher)
Setup: Over-Under Style
Chamber: 1'x3" PVC, 1427.72cc
Barrel: 31"x1.5" PVC
C:B Ratio: 1.4:1
Fuel: Metered Propane Injection
Meter: 6"x 3/8 Brass
Ignition: BBQ Ignitor
Ammunition: Standard russet potatoes cut in half, small apples, and paintballs in saran wrap for shotgun rounds
Modifications: Diametrically opposed spark gaps with dual ignition using a chamber short (burnt latke), Friction mounted chamber fan with on/off button and 9v battery pack, Custom built trigger frame with removable faceplate, hinging support block for breechloading, Quick interchangeable barrel ability, Exhaust end cap, onboard propane injection system including meter pipe and 0-60 p.s.i. pressure gauge, Krylon Fusion paint job, gun reloading stand (not pictured) made of 2x4 and padded with stapled-on towel cut to size.
Comments: This gun was built very sturdy, everything holds together really well. My goal was to build a combustion gun with ergonomics in mind, so i had to have onboard propane injection and breechloading for fast reloading times. It takes me about 45 seconds to reload at a comfortable pace. Probably about 30 if i was rushing. This thing shoots hard and it's LOUD! If i put in 55 p.s.i. into my metering pipe and dump it in the chamber it's like as loud as a 9mm Glock pistol. It shoots easily through 5/8" drywall every time, sorry no damage pics, maybe soon. I have yet to do a distance test but i'm guessing it's at least 300 yards, it gets about 10 seconds of hangtime when shot at a 45 degree angle on a 55 p.s.i shot. I love propane, it's so cheap, so powerful, so clean, and you use so little of it... hence "economy" in the name for this gun.
Attachments
Breechloading Layout
Breechloading Layout
Electrical Components Layout
Electrical Components Layout
Pic 1- ECL 1400.jpg
Pic 2- ECL 1400.jpg
Pic 3- ECL 1400.jpg
Pic 4- ECL 1400.jpg
Pic 5- ECL 1400.jpg
Last edited by sv490665 on Fri Jul 04, 2008 1:48 am, edited 3 times in total.
User avatar
schmanman
Staff Sergeant 2
Staff Sergeant 2
Posts: 1685
Joined: Sat Mar 25, 2006 12:28 pm
Location: Michigan,U.S.A
Contact:

Wed Sep 20, 2006 5:24 am

just a suggestion, I would stop with the red. I know, because when I was new, I used red, and everybody yelled at me. stick with the normal color. :wink:

oh, btw, nice gun
Persistence is a measure of faith in yourself
User avatar
mark.f
Sergeant Major 4
Sergeant Major 4
Eritrea
Posts: 3638
Joined: Sat May 06, 2006 11:18 am
Location: The Big Steezy
Has thanked: 58 times
Been thanked: 58 times
Contact:

Donating Members

Wed Sep 20, 2006 5:53 am

Screw the red. Nice gun!
User avatar
POS
Specialist 3
Specialist 3
Posts: 395
Joined: Thu Sep 14, 2006 4:19 pm

Wed Sep 20, 2006 6:11 am

indeed nice gun man. Very nice.
User avatar
killagorrila99
Sergeant 2
Sergeant 2
Posts: 1100
Joined: Tue Jul 25, 2006 2:35 am
Location: Australia.

Wed Sep 20, 2006 6:27 am

Ahhh Very nice. Reminds me a little of Gorts blue flame!
"I'm sorry, Mr.Bush cant come to the phone right now, He's playing cleudo with Mr. Cheney And he has him in the Cupboard with a broom stick" -White house receptionist.
User avatar
noname
First Sergeant 4
First Sergeant 4
Posts: 2698
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA

Wed Sep 20, 2006 6:23 pm

That's nice, it has to be for me to reply to it, seeing as I never hang out in the combustion stuff. Looks really good, who cares about the ball valve handles.
User avatar
ProfessorAmadeus
Sergeant
Sergeant
Posts: 1046
Joined: Fri Apr 28, 2006 5:39 pm
Location: texas

Wed Sep 20, 2006 6:43 pm

I like the handle alot. It is built and looks very nice. I too no longer make combustion because of the weak power but this one looks great.
Insomniac wrote:Hey why am I a goose???? Why not somthing a little more awe inspireing, like an eagle or something? LOL
SOO CUTE!! OMG!! I COULD JUST LICK YOU!!
User avatar
frankrede
Sergeant Major 2
Sergeant Major 2
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Has thanked: 1 time
Been thanked: 1 time

Wed Sep 20, 2006 6:47 pm

hmm, If the mods dont want colors why don't they disable the option to do so.
Current project: Afghanistan deployment
User avatar
sv490665
Private 4
Private 4
Posts: 73
Joined: Tue Sep 05, 2006 11:15 am

Wed Sep 20, 2006 6:59 pm

haha, for you freaks out there that can't stand the red, i'll change it.... I am a newb at this site, sorry. Thanks for all the positive replies though.
User avatar
noname
First Sergeant 4
First Sergeant 4
Posts: 2698
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA

Wed Sep 20, 2006 9:28 pm

No one cares about the red, man. It's awesome anyway.
pyrogeek
Specialist 4
Specialist 4
Posts: 457
Joined: Sat May 13, 2006 7:43 pm
Location: moline Illinios

Thu Sep 21, 2006 10:53 pm

Very nicely done. I especially like the hinged barrel for breech loading, never seen that before.
Mr.Taterhead
Private 2
Private 2
Posts: 34
Joined: Sat Sep 23, 2006 8:51 pm
Location: London KY

Mon Sep 25, 2006 11:49 pm

Wicked Gun Man !!! I love the onboard propane injection, hope to try that on a gun I have in mind later. Thanks for the pics and keep up the great work. :D
Mr.Taterhead
Private 2
Private 2
Posts: 34
Joined: Sat Sep 23, 2006 8:51 pm
Location: London KY

Mon Sep 25, 2006 11:56 pm

I do have just one question. How do you get the propane inside the chamber??? Maybe I'm just over looking that.
User avatar
MrCrowley
Moderator
Moderator
Posts: 10078
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Been thanked: 3 times

Tue Sep 26, 2006 12:17 am

instead of double posting edit your posts.
and did you read the title...hmmm let me see "Keiths PROPANE INJECTED ECL 1400
he uses a 0-60psi gauge to figure how much hes putting in and ball valves and crap...just read the orginal post and it tells you.
User avatar
sv490665
Private 4
Private 4
Posts: 73
Joined: Tue Sep 05, 2006 11:15 am

Tue Sep 26, 2006 2:24 pm

I think taterhead was wondering how the propane actually gets into the chamber from the meter pipe... if so at the end of the second ball valve i just put a 90 degree street elbow tapped directly into the pipe, sorry it may be difficult to see from the pictures. Look at pic 1, it shows the best angle of the street elbow from the ball valve into the chamber
Post Reply