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Hammer bounce?
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All Springer/NP/PCP Air Gun Discussion General
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PCP/CO2/HPA Air Gun Gates "The Darkside"
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Hammer bounce?
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Topic: Hammer bounce? (Read 1189 times))
doninva
Marksman
Posts: 417
yes
Real Name: Don
Hammer bounce?
«
on:
July 04, 2015, 01:59:54 PM »
I was thinking, sometimes not a good thing, about hammer bounce when using a stock hammer when regulating and tuning an air gun. I am setting up a disco with a bottle and regulator. Made a MDS nylon hammer but with the disco small spring hole, it limits the range of spring available. I put a very light spring in the valve. If this doesn't work, I have lightened my stock hammer as much as possible on the mill. I was thinking of using an o-ring like a BStanly tune to cushion the hammer when it gets to the forward stroke. Would this help or make hammer bounce worse. Thanks, Don
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Boones Mill, VA, USA
rsterne
Member 2000+fps Club
GTA Senior Contributor
Posts: 27130
GTA Forums Person of the Year 2017
Real Name: Bob
Re: Hammer bounce?
«
Reply #1 on:
July 04, 2015, 08:29:43 PM »
Very light springs in the valve can make hammer bounce worse, the only time I experienced machine-gun hammer bounce that emptied the reservoir was with a light valve spring, putting the stock one back in cured it.... Light hammers can reduce hammer bounce.... If the hammer hits the O-ring you will reduce the hammer strike, reducing the dwell, which could be good or bad, depending on if you wish to detune.... however it is likely to reduce hammer bounce as well....
Bob
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Coalmont, BC, Canada
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doninva
Marksman
Posts: 417
yes
Real Name: Don
Re: Hammer bounce?
«
Reply #2 on:
July 05, 2015, 08:26:09 AM »
Thanks Bob, I will go with the MDS hammer and light spring on my disco build. If I can't get the FPS around 880fps with 10.3 pellets, I'll put the valve spring back in and go with my skeletonized OEM hammer.
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Boones Mill, VA, USA
rkr
GTA Senior Contributor
Posts: 4411
Re: Hammer bounce?
«
Reply #3 on:
July 05, 2015, 04:36:52 PM »
I would try a stiff spring with negative preload. That usually reduces the bounce to one extra opening.
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GTA
»
All Springer/NP/PCP Air Gun Discussion General
»
PCP/CO2/HPA Air Gun Gates "The Darkside"
(Moderators:
Rocker1
,
only1harry
,
splitbeing
) »
Hammer bounce?