Inside the Hummingbird–Now the tuning & issue begins!
I will post all internals and how the bird work and whats need tuning or improvements in this Topic. This BP is going to be a hit, vary well made over the cricket.
Got her today so I will cover several area as I go along tuning and adjusting:
1. the gauge isn’t aligned properly in my book. So if you have a standard cricket gauge socket it will fit the HB, but 1st the AT must be vented
under the trigger guard is where the standard fill hole and use the same fill probe as the cricket, as you can see on the photo near the fill hole is
the bleed screw—-> its a larger heavy duty screw compare to the cricket. After all the air is vented the AT can be unscrew—this AT wall thickness is thick and heavy–so vary unlikely you wont dent the AT in normal use–even dropping the HB. the oring that seals the AT is 3mm X 30mm. the fill
check valve is the same size as the cricket, had to increase the fill rate to my liking vary easy to do.
2. Now I’m having issue with the bolt blowing back when shooting pellets, when it does a lot of air will blow on your cheek and scare the shit out of me the 1st time it happen also the speed will drop about 8 to 12 fps. now it blow back about 2 to 3 time a mag full that not good—have to find this problem. Has to be the locking ball of some type—its like a free floating bolt after its cock if nothing locking it in place it will blow back! If anybody has this problem let me know!!!! 😥
All Replies
As you turn the center silver nut cw to open it looks like it would also start to compress the VALUE spring also ?
Edited: The more I look at it, it’s fixed, thanks !
That’s one interesting looking reg !
~ GKU
NO, the piston bottom out on a smaller shoulder, turning the silver hex not compress the spring washer. –and has no play in compressing the valve spring. need correction on that video–kinda miss leading.
Thanks Ernest, I got it !
IMO, it’s external reg is the most interesting thing about this pup !
It would be cool if someone could come up with a shut off value for the AT. So one doesn’t need to empty it to adjust the reg. 😀
~ GKU
GKU, you dont need to bleed the AT to adjust the silver adjustment hex nut. I been adjusting it with 130 to 230B and the hex is still easy to turn. after adjusting shoot about 3 shots to settle down the reg washers.
As you turn the center silver nut cw to open it looks like it would also start to compress the VALUE spring also ?
Edited: The more I look at it, it’s fixed, thanks !
That’s one interesting looking reg !
~ GKU
NO, the piston bottom out on a smaller shoulder, turning the silver hex not compress the spring washer. –and has no play in compressing the valve spring. need correction on that video–kinda miss leading.
Thanks Ernest, I got it !
IMO, it’s external reg is the most interesting thing about this pup !
It would be cool if someone could come up with a shut off value for the AT. So one doesn’t need to empty it to adjust the reg. 😀
~ GKU
As you turn the center silver nut cw to open it looks like it would also start to compress the VALUE spring also ?
Edited: The more I look at it, it’s fixed, thanks !
That’s one interesting looking reg !
~ GKU
NO, the piston bottom out on a smaller shoulder, turning the silver hex not compress the spring washer. –and has no play in compressing the valve spring. need correction on that video–kinda miss leading.
I meant the little value spring on the inside of the pre-charge chamber.
As you turn the center silver nut cw to open it looks like it would also start to compress the VALUE spring also ?
Edited: The more I look at it, it’s fixed, thanks !
That’s one interesting looking reg !
~ GKU
It looks fixed.
~ GKU
you will see the speed increase without adjusting the HSTA, but to get the max speed the HST must be adjusted.
By turning the center nut on the reg cw (in direction) to increase the pressure. Does it also increase the valve spring tension ?
It looks fixed.
~ GKU
speed & count at 125B
pellet: 21.1g
fill: 230b
end: 125b
#shots 48
High: 873fps
Low: 863fps
ES: 10fps
35fpe
adjusted the reg more up to:
890fps with 21.1g = 37fpe
942fps with 18.1g = 37fpe
Hoot getting close, have to shoot & count string at this speed to check if the blow back is going to hold—-I think the reg is close to 130B
nice pix btw, Ernest. Where do you source your o-rings. I don’t suppose the HB came with a re-seal kit?
darryl
Tere the photo of the oring kit that come with the HB. most of my oring I get from: the oringstore
They will eventually have a .25, but I wouldn’t want to hold my breath till one arrives here!
Regards,
.
Hoot:
Hoot, got her up to 34fpe, I’ll see what her max is just by adjusting the reg and HST without any porting and polishing.
Ernest, do you think the HB is capable of more than 30 fpe? Do you think it has the potential to reach 40 fpe?
They will eventually have a .25, but I wouldn’t want to hold my breath till one arrives here!
Regards,
.
Hoot:
You kiddies play nice. Don’t make me… :whoop: !
nice pix btw, Ernest. Where do you source your o-rings. I don’t suppose the HB came with a re-seal kit?
darryl
Come on Dad (darryl), we just playing!
All oring size on the reg and fitting:
Wingman, Ernest says he’s only 58. Too young to be …what was I saying? :suprisedn: I just received my Medicare card! :rofl:
You boys play nice now, or I’ll have to run you out to the …what was I saying again? 😳
Pippo, thank you for the input. I hope the plastic is a high grade polymer
darryl
Even though I have to say that I’m not a fan of plastic, actually I hate it on guns…..
I have to admit that plastic made it’s way into firearms construction, where the stress of materials is much higher than on airguns, since a long time now and today probably (just estimating) plastic has replaced more than 50% of metal in production.
Actually there they call it “polymer” and not plastic anymore ….
So in conlusion I confirm that I hate plastic on guns but it has been proven that there are a lot more of pros (than cons) by using “plastic” ….
Also the model making (like model aircraft construction) has chosen and preferred “plastic” since a long time ago…
ATB
:2cents:
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Wow, that’s very vAry cool !
Another word of CAUTION if you don’t mind Sir ?
A scenario:
If one does empty the AT to disassemble and word on the reg. Will the air in the per-charge camber bleed out. Or does one need to dry fire it to release the pressure in the pre-charge camber before it blast off when removing the 3 mounting screws ?
~ GKU