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PostPosted: Sun Jun 04, 2006 11:29 am
by harmon12407
I've been working on my hybrid for about 10 months now, drafting, redrafting, aquiring parts, etc and im excited to say that i'm almost finished with construction :) Here's some pictures and details about what i've got going. just wanted to share this with all of you because its comming along really well.

Here are some pictures of the chamber: ... annon2.jpg ... cannon.jpg ... mfront.jpg

The chamber is 4 inch sch40 rolled steel rated to 1,600psi; the endcap is also steel and rated to 5,000psi; the bell reducer is steel and rated to 1,500psi. My uncle works in a machine shop and was able to get me all these parts for free ;)

Here's a closeup of the camlocks and union: ... sembly.jpg

i decided to use both camlocks and a union. The union is galvanized steel and doesnt have a really big seating surface for the burst disk. i have to make a gasket to help it seal. I'm using aluminum foil laminated on one side to hold back the pressure. The laminate helps keep the burst disks maintain shape and reinforces strength.

edit: someone asked why i have a sch40 male adapter on the couplings... Im using sch80 for the barrel, but a sch80 male adapter is 15 dollars. i got this pw sch40 one for $1.99. im also not using metal because i dont want to put a lot of stress on the union and camlock joints (plastic conserves weight). I have two barrels; the first is a 10 foot length of 2 inch sch80 for spuds, and the second is sdr21 sleeved in sch80 (also 10 feet long) for golfballs. i can breachload the golfballs with the 2 inch cam and groove couplings.

Air injection/ gauges/ 0-400 exhaust: ... sembly.jpg

from left to right as depicted: valve stem/ 1/4 inch tee and 0-60 gauge/ shut off valve as protection for gauge/ 1/4 inch tee (injection inlet)/ check valve/ 1/4 inch tee and 0-400 gauge/ po safety drain valve (not in picture)

Plug and fouler: ... fouler.jpg

i still have to drill and tap the hole for the plug, but i ordered the parts, and i'm good to go. i'm sealing it from the inside with the fouler which i have to modify. i need to cut off the end and use it basically like a nut.

Relay: ... /relay.jpg

i got this relay for 25 dollars and it is incredible. Its an rf relay with a range of 250 feet. Each channel can be individualy set as either latching or momentary, and from there as normally open or normally closed. response time is instantaneous, and because its radio frequency and not infrared, the signal transmits through and around objects. standing in the basement of my house with the relay 3 floors above, it worked flawlessly.

I'm wiring a 100,000V stun gun on momentary to the second channel and using the first channel as an on/off for my air compressor.

im going to finish construction this weekend, but probably wont have this in the finished cannons section until july. i'm excited to see what kind of performance i can get out of this thing.[:p]

PostPosted: Sun Jun 04, 2006 11:40 am
by markfh11q
It looks great! I can't wait to see it finished!

EDIT: What kind of barrel are you going to use? Is that a SCH-40 male adapter on the male cam lever coupling?

PostPosted: Sun Jun 04, 2006 12:45 pm
by bigred28
I was going to ask the same thing. Why wouldn't you just use another steel fitting and a steel barrel? Methinks it would look much cleaner that way.

PostPosted: Sun Jun 04, 2006 1:19 pm
by GalFisk
Weight/balance considerations maybe? It looks really heavy (and really cool) as it is.

PostPosted: Sun Jun 04, 2006 3:23 pm
by bigred28
I know, I just thought maybe even just for pressure rating's sake.

PostPosted: Sun Jun 04, 2006 3:35 pm
by SpudMonster
That looks pretty cool! That's amazing that you got the steel chamber for free... Like mark said, I can't wait to see this monster in finished cannons!

PostPosted: Sun Jun 04, 2006 4:10 pm
by utcpyro
A METAL Hybrid?! Holly crap! I can only guess at the mixes this thing could handle. Also, where did you get the remote controle relay like that? It's almost just like the one in SMOMW's hybrid ignition box, except it has teo channels. You getting over 150 ft range with it as well?

Oh, and I suggect you use at least SCh-80 for your barrel, otherwise the pressure shot when the burst disk blows is going to grenade that thing,

PostPosted: Sun Jun 04, 2006 4:20 pm
by markfh11q
Heh heh... I was hinting at that when I mentioned the SCH-40 male adapter. Since utcpyro said it, I guess I don't have to be the bad guy...;)

PostPosted: Sun Jun 04, 2006 5:36 pm
by TurboSuper
Looks really nice so far...the black gives it that "authentic" look.


I hope you get a metal barrel, a plastic one would be rather limiting in terms of pressure.

PostPosted: Sun Jun 04, 2006 6:52 pm
by harmon12407
thanks for all the good comments. i edited the initial post and added a lot more information. questions and comments are welcome. thanks! ;)