Leshiy odd hammer adjustment reults
Hi all,
Got myself a UK legal <12 ft/lbs Leshiy. Adjusting the hammer spring tension is working in reverse. Increasing hammer spring tension reduces power, reducing hammer spring tension increases power :confusedn: Could it be a low regulator pressure or the restricted transfer port cause this. The power will not go above 12 ft/bs which is great, just seems odd.
Cheers,
John :smilen:
All Replies
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Don’t think his reg is set to 60 bar, a bit higher about 80-90 bar ?
Also, I wouldn’t top fill that high ……. 140 bar max.
Don’t think you need to know what bar you’re on as long as you achieve about the same results.
You could try and tune down your reg a 1/8th turn and test see if your heading the right direction or not.
Change out the O-rings while you’re in there.
Taking measurements of the reg first in case you need to go back to factory.
~ Greg
38 shots.
~ Greg
Is he getting 22 shots at 570 fps (JSB 15.9) from 190 – 110 bar too ?
~ Greg
52 shots from 250 – 60 bar. Going to run a string today from 250 bar down & see what shot count I get.
John :smilen:
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Is he getting 22 shots at 570 fps (JSB 15.9) from 190 – 110 bar too ?
~ Greg
What are you trying to achieve ?
The same fpe with higher shot count with quiter report ?
Or a high powe tune …… if so, I’d take out just the TP restrictor and leave the reg settings alone for now and test see.
– Greg
Same fpe but quieter. A mate of mine has one from a different supplier, same fpe but much quieter. I can only assume that his has the reg set at 60 bar accounting for the quieter report.
John :smilen:
.
What are you trying to achieve ?
The same fpe with higher shot count with quiter report ?
Or a high powe tune …… if so, I’d take out just the TP restrictor and leave the reg settings alone for now and test see.
– Greg
If no one responds soon …….
I’d try and contact Brian at West …. he’d be the Man to ask for measurements to adjust the reg !
https://www.edgunwest.com/contact.html
Also there’s a reg kit to get more shots out of the Leshiy by HUMA that WingMan and Brian help put together that doesn’t require a tester to reset.
https://www.edgunwest.com/store/p53/Huma-Air_Regulator_Regulator_-_Leshiy.html
Is the Transfer Port Restrictor removable/replaceable or able to port out/open up some how ?
~ Greg
Thanks Greg,
I haven’t had it apart, but assume it is just the little brass transfer port restrictor Ed shows in his video. It’s the reg setting that’s got me thinking at the moment. I’m only getting 22 shots at 570 fps (JSB 15.9) from 190 – 110 bar this is when the velocity falls off a cliff. The hammer spring tension is at it’s lowest but it also seems quite loud for a 12 ft/lb gun. I was wondering if it was worth removing the restrictor & setting the reg at 60 bar.
John :smilen:
John
If no one responds soon …….
I’d try and contact Brian at West …. he’d be the Man to ask for measurements to adjust the reg !
https://www.edgunwest.com/contact.html
Also there’s a reg kit to get more shots out of the Leshiy by HUMA that WingMan and Brian help put together that doesn’t require a tester to reset.
https://www.edgunwest.com/store/p53/Huma-Air_Regulator_Regulator_-_Leshiy.html
Is the Transfer Port Restrictor removable/replaceable or able to port out/open up some how ?
~ Greg
What I think the OP is saying is that by turning the HST CCW on his Leshiy decreases the velocity rather than increasing it like it suppose to do, and visa versa.
It sounds like the TP is restricted to meet the 12 fpe limitation and or the reg settings low.
What I think you are seeing is the second peck in the reg curve down side.
It’s not hard to open the Leshiy too see what is causing this opposite effect from what I’ve been seeing it looks easy to work on.
It’s limited that way for the reason of legality for if that’s where you’re at ?
– Greg
Exactly this :biggrinn:
After some extensive shots over the chrono today, it appears that the transfer port restrictor is all that has been added. The FPS drops off dramatically once the pressure gets to 110 bar. I was under the impression the 12 ft/lb models had the reg set at 60 bar :confusedn: Is there any way of setting the reg without a reg tester, for example a measurement of the adjuster nut to reg body.
Many thanks. John :smilen:
LOL
I guess I missed something :confusedn: :whistle:
Yes it is locked for UK rifles with a limiter to keep it from going above 12ft/lbs. Though I stand by what I said it HST adjuster is reversed. Counterclockwise twist (increase) Clockwise (decrease).
edit: (if I just had read this completely all of this has been stated already) oooops :rofl:
:rofl: :rofl: :rofl:
What I think the OP is saying is that by turning the HST CCW on his Leshiy decreases the velocity rather than increasing it like it suppose to do, and visa versa.
It sounds like the TP is restricted to meet the 12 fpe limitation and or the reg settings low.
What I think you are seeing is the second peck in the reg curve down side.
It’s not hard to open the Leshiy too see what is causing this opposite effect from what I’ve been seeing it looks easy to work on.
It’s limited that way for the reason of legality for if that’s where you’re at ?
– Greg
Yes it is backwards. As I was told by Brian from Edgun West….
It has to do with the location. Adjusting HST from the front of the Leshliy increase your pulling the spring towards you so…(counterclockwise) so compared/instead of a HST from the back of a rifle your pushing the spring (clockwise) increases power.
I hope that makes sense.
Ed had a video about that. with leshiy the clockwise thing is other way round.
maybe too much vodka by the design table
lol
if not that, he had a video about too much hammer spring, he was saying there are 2 power maxima, if you over do the hammer spring the shotcount will be poor. and in between the 2 maxima there is a region with lowerd fps. the return spring trows it back so power is reduced in the end because i think shortened dwelltime or the hammer bounce is different or similar nonsense. but that video was a matador video
When you turn it clockwise the hammer spring tension is decreased. When you turn it counterclockwise the hammer spring tention is increased.
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37 very consistent shots from 250 – 110 bar, then 6 shots tailing off until it falls off the cliff.
John :smilen: