Tuning RAW HM1000X .25 further upgradations with new technology of FX

I’m guessing your using cnc equipment to make these part?

if so? Have you ever thought about making cad drawing of the components u have made? 


or are u planning on making and selling the parts as upgrade packages?

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All these parts are made on ordinary laith machine but with extreme precision. 

I plan the things and I and my machinist sit together and discuss that how we can achieve it through machining parts.

Once we come on same page, my machinist makes parts and we install these parts and test for results. 

Still the above mentioned upgradation is yet to become time tested.



I have to shoot at least one thousand pellets to be sure that there are remote chances that this upgrade will fail.

I have sent the plenums for RAW to Harry (Yarrah) in Australia and another person to another country.

I just do what I can do. There are also my limitations as this is basically not my business rather its my hobby.

Bhaur 

Very Nice Mubhaur,

Let us know if there are other efficiency's beside hammer weight / hammer spring reductions.

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An important thing is that now the valve spring tension is adjustable externally. 

The rest of things will take time to be sure as I have to reduce the hammer weight and a matching SSG will be made.

I hope it will work good

Yes and your valve should open very easily are you going to incorporate a bumper like the rubber ball in the fx to or just the adjustable spring either way I think this will work very well

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Just the exposure of front end of valve stem in atmosphere is good enough. It doesn't need a thicker dia and more than required length.

Valve is opening very easily. 

I am quite confident that I shall achieve all objectives and it is a technically advanced RAW now.

Rubber ball is not needed rather it is the arrangement just like fx impact mk2 with PP. There is no rubber ball in that model and similarly I didn't find need nor found enough space to put rubber ball.

In fact I have to adjust the valve tension spring with 5mm Allen key. While in impact there is a large knob for that purpose. 

But I didn't want to make any such modification which could not be reversible. 

It is very easy to adjust valve with the Allen key. 

In fact I have achieved two objectives. One is opening of valve stem in atmosphere and the other is external adjustability of valve.

Bhaur

Ok yes I understand the adjustability will be great and easy opening valve is also great very nice job interested in the overall out come I will be working on my cobra valve this week after work and will post some pictures cobra valve won't open easier it will just close alot faster than a conventional valve but I do like your design you are using keep us posted

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In fact it's not my design I just borrowed one good thing from fx royale and another from fx impact. 

Thank you Frederick and Johan. I hope FX will not mind it as it is part of my experiments.

Bhaur

Long Gun Dallas

Yes this is the concept behind all my effort. Further the valve has become adjustable externally. 

I shall also make video for my YouTube channel and share the link here for all to understand that how this system works.

Bhaur

Did some testing today.

I used only 25 grain .25 jsb pellets. 

Hammer was stock like 76 to 80 gram and very light hammer spring.

Consistency was not good but I understand that once I make light hammer and use stiffer spring the Consistency will come back. But it will take time to make the hammer of required weight as it needs trial and testing.

The good thing is the I filled the gun to 250 bars and started shooting the pellets at around 950 fps.

After about 20 pellets I started dry firing the gun. Then again after 20 dry shots I used some pellets. 



So I went on switching between dry firing and shooting the pellets. 

My reg is set at 150 bars and after 150 bars the fps went very high which I controlled through valve adjustment and hammer spring adjustment. 

I got combination of 200 shots at an average fps of 950 out of which 140 were dry fires and 60 were pellets. 

After the bottle pressure reached 100 bars the fps started decreasing so I stopped shooting. 

I understand that when pcp is used without pellets it consumes more air.

Even if we neglect the above observation, 200 shots from 480 Cc bottle with RAW from 250 bars to 100 bars at an average of 950 fps looks promising to me.

Am I right!!!

Bhaur

I don't think it can be said that a pcp with no projectile uses more more air. I know some use more with a projectile. The added resistance to expansion provided by a (even more so) heavy projectile can cause the valve to close slower in some cases.

Still good results, though!

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Agreed. You may be right.

"I understand that if I put the original RAW valve body that has an O ring groove back in the gun and make a new valve with stem extending to both sides, one side that will enter the valve body will automatically seal with the O ring in valve body and on the other end of valve stem I shall make groove and install an O ring."



Hey Mubhaur,

The second o-ring located in the (modified) Valve Blanking plug is the only part of your methodology I'm having a hard time visualizing. Do you have a better pic or explanation for this?

Kirk

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If you can find the diagram of FX Royal series on FX support website you can understand it better.

I did not use the original valve body of RAW original valve rather kept rear end passing through delrin guide as was previously in high efficiency valve. 

I just arranged opening of front stem in atmosphere. 

So what you have quoted is not exactly what I have finally done.



The front end of valve pin is visible in the pic but it is sealed with an O ring arranged in new part through which it is coming out. That O ring is keeping the air coming out of regulated chamber. 

I hope you get it.

Bhaur 

When you have a similar balanced valve as in FX then you need similar hammer weights and spring force. FX Crown has a hammer weighing about 7 grams ...
It is a shame that the vast majority of PCP manufacturers do not have this or a similar balanced valve!

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You are right. Now I have to find a good combination of hammer spring and lighter hammer weight for required powers and extreme consistency. 

Bhaur