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!!!! š„
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Ernest, thank you. I’ll get it ordered right away. BTW, the mule team hasn’t shown up with my Bird just yet. Late delivery on this route, even for Priority mail,and it’s after 4:pm (EST) here. š But, thank you very much, again, for the link.
Darryl
darryl
here you go, you can still screw the fill probe directly to your CF tank hose.
thanks fiddlefadel. I’d asked that my HB be evaluated for proper operation by Peter. I’ll let this how well that turned (as soon as I can fill it!!!) :rofl: Maybe it won’t be a laughing matter? š
darryl
darryl
Congratulations :8: Please keep us advised . It will be interesting to see if you have the same blowback issue.
Dave
Ernest need some quick help!! What Foster fitting (type and specspec do I need to order for the HB fill probe?
darryl
Well young “pups”, my Bird is “out for delivery”. Peter mailed it on Monday to SW Ohio by fast Mule train. This thread has been very helpful, and I’m sure it will continue to be so. Lots’s of interesting questions, and replies. I didn’t event have to put anyone on timeout for bad behavior!! :darth-vader:
Ernest, a compact HB? Well, well… So now is a good time for me to ask you for an updated impression of the HB since you’ve had a chance to learn it’s secrets, and spend some quality time with it. What do you think of it now, on it’s own merit, and in comparison to your general new-bull pup experiences?
thank you (all!)
Darryl
All great info Ernest thanks, learning more as I go !
~ GKU
I would think the pressure in the per-charge camber is about 20-30 psi. Based on the fact that my STD 22 cal put out about 1.43 bar per shot.Which is not to bad but still it can be quit deadly.
In the carpentry world itās, āmeasure twice and cut onceā.
In the PCP world itās, āask the expert once, then still be twice as carefulā.
~ GKU 
GKU,
IF reg is set at 120B Output of the regulator will maintain 120 unless the AT pressure goes below 120b, so the pre-charge chamber/regulated chamber will have 120b—-> not 20-30b.
The fireing valve by way of the hammer weight and HST controlling the volume of air required to maintain target speed!
On a cricket .22 standard an average of 20 to 25b of AT volume per mag (14 shots) all depend on reg pressure, valve spring tension, HST, transfer port size, atmospheric pressure and how tight your barrel is.
That 20 to 25B volume of air is controlled by the firing valve. That’s doesn’t truly reflect bar per shot because there’s is no way to measure pressure /volume outlet of the firing valve—-we just see it as FPS.
I see …….. …
I would think the pressure in the per-charge camber is about 20-30 psi. Based on the fact that my STD 22 cal put out about 1.43 bar per shot.Which is not to bad but still it can be quit deadly.
In the carpentry world itās, āmeasure twice and cut onceā.
In the PCP world itās, āask the expert once, then still be twice as carefulā.
~ GKU
I myself donāt have a Colibri as of yet. But I like to see the science exposed behind this new pup, inquiring minds what to know.
Excellent work Ernest !
~ CU, GKU ……… ….. . gone hunting.
FX use this setup of the same HP tubing, I never seen or herd of one exploding–if it did the tube is under cover in metal and wood, maybe some leaking at the oring. So I feel kinda safe!
while reassembling the reg and testing ( didn’t make marks on the reg length setting–so learned the hard way–the rear LP oring of the piston totally burst and vented all the air in the AT through the bleed hole on the reg body) the cause the silver hex not was back out to far so the piston LP oring went off its seat by traveling to far foreword. I wasn’t to scared I all-way wear a face shield while testing.
I like that.
Ernest can u post some more photos of the plumbing of the air system ….
It would be sweet if they made a compact HB. …..
Maybe I just need to get one and see how they are…
You got any plans to shorten one of these up ernest?
Haven’t unscrewed the other end of the tubing above the trigger blade—not planning on it.
This HB is the long model 37+FPE and not planning on making it shorter, the compact HB at 24″ is in the works.
Some are not familiar with an external reg and its differences can be dangerous indeed.
I myself donāt have a Colibri as of yet. But I like to see the science exposed behind this new pup, inquiring minds what to know.
Excellent work Ernest !
~ CU, GKU ……… ….. . gone hunting.
Now that is definitely unique an external regulator!!!!
I like that.
Ernest can u post some more photos of the plumbing of the air system ….
It would be sweet if they made a compact HB. …..
Maybe I just need to get one and see how they are…
You got any plans to shorten one of these up ernest?
Another word of CAUTION if you don’t mind Sir ?
A scenario:
If one does empty the AT to disassemble 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
will not empty, one dry fire will empty the reg chamber!!!!!
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The mule team dropped by today but apparently the board has reached it’s attachment quota. I’ll try to post pictures at a later date.
darryl