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Pat123's Hybrid Rifle
Posted: Fri Mar 28, 2008 4:21 pm
by pat123
Here it is finally after alot of problems. thanks to everyone who helped me.
Pat
Posted: Fri Mar 28, 2008 4:24 pm
by STHORNE
very nice job. very nice job indeed.
some questions though:
why so much electrical tape?
and... source of ignition? stun gun i presume
Posted: Fri Mar 28, 2008 4:53 pm
by SpudFarm
wow kinda reminds me of my hybrid
do you got any numbers?
Posted: Fri Mar 28, 2008 7:13 pm
by pizlo
The huge wad of tape is a nice addition.
Posted: Fri Mar 28, 2008 7:15 pm
by bigbob12345
Great job
some specs would be nice though
Posted: Fri Mar 28, 2008 7:19 pm
by pat123
why so much electrical tape?
and... source of ignition? stun gun i presume
It is actually black duct tape. it is the only thing i could find to attach the electric bbq lighter.
I haven't shot it yet. I will tomorrow. I'll post damage pics then.
the chamber is roughly 13" of 1.5" sch 40 steel
barrel 36" .5" sch40 steel
edit: changed chamber from 18 to 13"
Posted: Fri Mar 28, 2008 7:23 pm
by bigbob12345
barrel could be a lot longer(atleast 72in).
I would also recommend a larger bore barrel with a chamber that size, A 1in barrel should work good with it.
Posted: Fri Mar 28, 2008 7:33 pm
by pat123
Ok thanks.
could you help me with my pressures to fill my meter and stuff. I tried several times and I am getting wierd numbers.
Posted: Fri Mar 28, 2008 7:40 pm
by bigbob12345
here is a link to the math required for finding the right pressure for hybrid meters
http://www.spudfiles.com/forums/hybrid- ... 13602.html
Posted: Fri Mar 28, 2008 8:00 pm
by pat123
so if my chamber volume is 23ci I would do this
23/.958-23
this would give me 1.008
I divide that by my meter volume which is .45ci
now I have 2.24 bar?
multipy that by 14.7
giving me 32.93psi
so for a 1x mix i fill my meter to 32.93?
for 2x i us 64 and so on?
how do I get to a 4x mix? propane tanks don't hold 131psi do they?
Posted: Fri Mar 28, 2008 11:31 pm
by jon_89
Looks pretty good. In your math I think you need to convert psi to bar or visa verca. I am not 100% positive though.
Posted: Fri Mar 28, 2008 11:36 pm
by bigbob12345
Pat:You just charge the propane meter to 64psi twice and you will get a 4x mix.
Posted: Sat Mar 29, 2008 8:37 pm
by hi
its a little harsh on the eyes, but if it works it works!
Posted: Sun Mar 30, 2008 2:04 pm
by pat123
Pat:You just charge the propane meter to 64psi twice and you will get a 4x mix.
thanks I get it now that was a stupid question
its a little harsh on the eyes, but if it works it works!
Yeah I am trying to find a better way to attach the bbq lighter and some way to hide the wires. I might just cut them shorter but they have the tips to attach to the bbq lighter. HOw would you attach the propane tank other than zip ties?
Posted: Wed Apr 23, 2008 3:38 pm
by SpudFarm
hybrid Rifle- finished, 1400 fps with a 5X mix based on hgdt.
pretty much doubt that.. my bigger hybrid with 80" barrel and 5x with a marble got 1075fps.