More hammer spring tension = slower speed
If more hammer spring tension = lower speed, what does that indicate? (or is it normal)
I’ve tuned the regulator to have a set value which gives me optimal speed when hammer spring tension is at 1mm from flush.
I’ve tweaked the valve pin tension according to Ernest videos.
However, If I turn in the hammer spring the speed goes from 268m/s (flush) -> 264 m/s (full inward)
I’m curious to why, should it not raise slightly?
something bouncing? Valve spring too tight?
I’ve actually seen this before on regulated FX guns but never understood why… ❓
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It depend what speed he want to use? If 268mps and 268mps is maximum what cricket could get is regulator set to low. Is necessary slightly increase pressure behind regulator. Then find max. power with HST and after that CCW 1turn with HST for proper speed. Regulator densest work in back side.
That sounds very good. The magazine seems to be the only minor issue but hardly a showstopper. Are you happy with the stock?
Hello SECoda
Frankly I love my Cricket a lot , and I converted it from std. To compact and traded my old stock to get the skeleton one, but I was unhappy with 2 things. Lacking a safety button and the relatively high air consumption compared to the other Bulpups I used.
The Vulcan came up with more than just solving those 2 shortcomings. It added an easily accessible safety button and improved the air consumption by removing the air pocket between the reg and the firing valve compartment. In addition to that , relocated the bolt such that the shooter can follow up shooting without the need to take the hand off the trigger . Also lefty shooters were taken into account. In fact Both are accurate enough , but after putting only a few hundred pellets in the Vulcan it is clear that it is more accurate.
So far I didn’t take it apart, but sooner or later I will do that to increase the power to enable usage of heavier pellets and squeeze out extra power. Tearing down the Cricket was so simple and the Vulcan seems to be much more easier.
I have to mention that I miss the speed I used to load the Cricket magazine with pellets.
Hi Kmhusain – it sounds like you are really liking that Vulcan?
I’ve tuned the regulator to have a set value which gives me optimal speed when hammer spring tension is at 1mm from flush.
I’ve tweaked the valve pin tension according to Ernest videos.
However, If I turn in the hammer spring the speed goes from 268m/s (flush) -> 264 m/s (full inward)
I’m curious to why, should it not raise slightly?
something bouncing? Valve spring too tight?
I’ve actually seen this before on regulated FX guns but never understood why… ❓
I believe that the spring when over pressed , ie over increase the HST , it bends and the kinetic energy stored in it decreases and causes the velocity drop.
Easier said than done 🙂 I just troll the forums and learn from Ernest.
Maybe all that fuxing has payed off
😛 😛 😛 That was a profound new term and definition to the airgun hobby. I believe Wingy said it best.
Donny… you have become quite the cricket garooo.
Maybe all that fuxing has payed off
The Hammer spring adjuster yields a bell curve. As you are screwing it in, the FPS goes up (need chrony). At every turn you make take 5 shots and make sure it is consistent. If the chrony shows that the 5 shots are higher than the previous 5, keep turning it in and take another 5 shots. Repeat this until you notice the fps falling. Once you see the drop, it is an indication that you’re going over the hump in the curve. The reason is the more you screw it, the less space for the spring to expand and contract. So once you see that your fps is going down, turn the adjuster one full turn back and start screwing it in again slowly until you reach the highest number on your data sheet. Whatever that highest number is that’s the best setting for your current regulator setting.
Probably – we would need to see a shot string with the pressure at each shot to be sure. We saw this on the Edguns too when you crank up the hammer pressure too much – the velocity starts dropping. Then you have to back it way off and work your way up to achieve the most efficient performance for the regulator setting. If you are trying to achieve a particular velocity it may need some work. Ideally, you set the hammer right before the velocity starts dropping.
Are your saying, regulator set slightly too low?
It sounds like its reached the back side of the regulator.
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Wow ,how did I forget to mention that. It is the bate that get me to the hook.
I can’t take my eyes off while it is on the sand bags in front of me. It is only 14.8 oz. with a beautiful laser checkering at the front and ergonomic contours allow many hand grips. The end of the stock suitably rests on the sand bag for bench rest shooting which is my main shooting activity.