another question on piston hybrid.

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?

SpudFarm · Sat Apr 05, 2008 11:53 am

you are confusing me

pat123 · Sat Apr 05, 2008 11:57 am

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

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!

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...

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.

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...

pat123 · Sat Apr 05, 2008 12:18 pm

I was also thinking about somethng like this

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.

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...

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.

another question on piston hybrid.

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