FX Crown hammer

[Shas]

Hi !

Just a question regarding the FX Crowns hammer, You out there that has increased the hammer weight, why change the design of the original hammer ? Why not copy the original design in a heavier material like brass.

I understand that its easier to make it like "Ernest" did but if You do so You miss the guiding that the original hammer has and in my way of thinking the smoothness in reloading an firing the weapon.

Am I wrong ?

 

[Long_Gun_Dallas]

Literally almost no change what-so-ever. The weight is a spring guide. It just moved positions inside the gun, but still performs the same job just as well. The only change in feel is the tiniest bit more tension as it is a bit of a shim. But that can be dialed in or out as needed/desired. 

 

[Shas]

Ok, thanks I was a bit concerned that the spring should damage the block..
.
Did You bought Ernest weight or have You made Your own. There is so many thoughts regarding the weight. What is Your opinion ?
I have desided med to try with a 12.5gram weight and a 10mm flange

 

[Long_Gun_Dallas]

I use a 7gm with 3mm flange. That I made. What you suggest would be enough to operate the gun at ~170-175bar. Factory maxes out around 135 in my experience. And 155bar feels about the same for my 7gm weight

I left a little of the original spring guide and rounded the end. As long as everything is smooth in there, I see no reason why anything should bind or hang. 

 

[Jayson]

6-8 g gives you a lot more reg range, over 10g would mean above 170-180 bar I would think? 

 

[Shas]

Ok thanks ! I have the same experience regarding the regulator, it works fine up to 140bar. If You go over that point it starts to live its own life... I think I have the material to fix one this evening. Its a nice project for my minilathe

I will give you an update tomorow...

 

[Shas]

Hi I'm sitting and compare a hammer, model Ernest with the original. The "flange" on the original is about 15mm or 0.6inch and then You lose a couple of mm in the springholder. That means that the spring must be minimum 12-20mm to short.

What do I miss ?

 

[Shas]

Hi

Well at first my scale at home don't work very well with this small items. When I first checked the weight I got it till 6gram, on a real scale the weight is 17gram and that's why I made completely wrong conclusions.

I do not have an extra springholder and that is why I did a new hammer with the intension that it should be 12.5gram instead of 6gram. The weight on this new brass hammer is 18gram so I have not much use of it....

The only conclusion I can come up with is that You use another spring and not the original. Correct ?

 

[Long_Gun_Dallas]

Wait.... There's no way the hammer only weighs 18g..... Right? I'll weigh mine when I get home

 

[Long_Gun_Dallas]

16.5g wow, I would not have expected it to be so light. I have never removed mine. So, you want one that weighs 29g

 

[Revoman]

Kind of rhetorical question:

If the core was drilled out and lead shot inserted, would that not make it weigh more? If that was he case, then one could work up the correct weight and ultimately flux the core and melt the corresponding lead shot into it so there would be no noise or shifting inside.

Am I out in left field on this?

mike

 

[Shas]

Easy now.. I'm just wondering why everybody talks about a heavier weight when we actually decrease the weight. (Ernest way)
Another thing, If I use a weight with a 10mm flange you have around 5mm less tension on the spring due to the original weight plus a couple of mm due to the redesign of the spring holder 

Yepp it's possible to drill out the core from the brass. If I left about 5mm of brass in the front there is around 10mm to be changed. 9mm plus a washer.

- (3,14159 x 5 x 5 x 10 x 0,0085) + (3,14159 x 5 x 5 x 9 x 0,0135) = - 6,7 + 9,5 = 2,8gram + the weight on 1mm washer. So we can increase the weight with about three gram... 

 

[Shas]

And now I got it. Some times You wondered what You are thinking with. The extra weight is ofcourse in the hammer. How could I miss that. To my defence, at least I understand that I have missed something. I have looked at Ernest video and there You don't se him put in the original hammer.

 

[Long_Gun_Dallas]

I was scratching my head, lol. Couldnt follow what you were saying, haha. I also dont see how you would ever have any less spring tension? Adding the weight shims the spring so there is more tension. The bigger the weight, the more shim.

 

[Shas]

Hmmm... let's forget about this and start fresh. Fixed the springholder and did my first weight aimed at 12.5gram and ended up at 15gram. I will check and se if this one cock as it should otherwise I will adjust it.

I will make a 12.5, 10.5, 8.5 and a 6.5gram weight and than test thoose.

 

[Long_Gun_Dallas]

Man, that is overkill, haha. And I thought 12.5 was overkill 



Let us know how it does!

My 7g one got me to 65fpe in my 22 caliber. I've been tempted to make a bigger one just to see. 65fpe is a bit absurd as is to be honest.

 

[Shas]

Well it was not my intension, but I tested it in my block yesterday and it worked mechanicly perfect, its no pretension on the spring and there is a much more destinct fiering. I will now make the other ones and then I will go for a test.

I have also made a new valve with a larger sealarea, It seals perfect at 6.5mm and I can easily increase the hole to 7.5mm in the valveseat.. When I tested this valve it it just generated about 30Joule and I more or less stoped working with this. But now when I have been familiar with the extra weight needed to open the valve I understand why... It should be very fun to test this valve vith a heavier weight.

I just wondered fpe is thet equal to fot pound. 65 x 1.3558 = 88 Joul. If so thats very god... I have a 6.35mm and today I'm around 72Joul

 

[Special-FX]

Hi all my valve housing is sealed off - whats the advantage of fitting the Valve housing with a hole in it, 

 

[Shas]

All ? I just have one.... must be my bad language. You can modifiy the original valve seat from about 5.5mm to 6.3mm with the HP valve pin. If You make a bigger hole in the valveseat it will not seal. 

I have made a own pin that will seal with a larger hole in the valveseat. I have a much bigger flange on that one. Mechanicaly it works fine but as I already told You the rest is yet to come...

 

[Shas]

I choose to keep the 10mm flange om all the weights to get the correct weight I made some of them hollowed. The reason is that I dont need to adjust the hammerwheel between the tests.

I'm going to start with the 6gram weight and slowly increase the regulator until no change will appeare throw the chronograf. Then I will decrease the regulator a bit, fill the gun to 230bar and shot a serie at five shots throw the chronograf. Hopefully I will get 5 shots very equaly in speed and energy and ofcourse I will also note the pressure left in the bottle

And after that I repeat this test with the rest of the weights (They all have the same flange, the picture lie)