hw90 cocked power retention

[ellir0305 9]

ok my HW90 theoben has been mention a few times today, but i was wondering:

 

it is a theoben gas ram gun, therefore it should retain its full power once coccked for a considerable period of time

 

however i have noticed that when the fun is fired within about 30 seconds of being cocked the power is fine however after this time it drops off a little

 

does anyne know why this is, my only thought is the seal on the piston is going?

 

any advice is greatly appreciated

 

ps. mods i am not trying to up the power and such suggestions will be ignored. i just want to diagnose the problem

 

thanks

 

rob

[LOGUNSOLO177 0]

You would need to chrono it mate!! Could be a bit of paranoia??

[smokin 0]

it ccould be everso slight wear on the ram seal without a chrono result hard to say - but - they are surprisingly basic if youve ever seen one - on the power subject the seals on non fac rams will knacker very quickly if pushed over their intended use. as for the ram iirc they are set to approx 50bar for 12ftlb in .22

 

atb

 

 

chris

[ellir0305 9]

it ccould be everso slight wear on the ram seal without a chrono result hard to say - but - they are surprisingly basic if youve ever seen one - on the power subject the seals on non fac rams will knacker very quickly if pushed over their intended use. as for the ram iirc they are set to approx 50bar for 12ftlb in .22

 

atb

 

 

chris

 

i wouldnt think its paranoya as you can hear the difference, how much would it be to have it chronoed?

[smokin 0]

it ccould be everso slight wear on the ram seal without a chrono result hard to say - but - they are surprisingly basic if youve ever seen one - on the power subject the seals on non fac rams will knacker very quickly if pushed over their intended use. as for the ram iirc they are set to approx 50bar for 12ftlb in .22

 

atb

 

 

chris

 

i wouldnt think its paranoya as you can hear the difference, how much would it be to have it chronoed?

 

local gunshop should be able to do it - free or a few quid - worth saving for a combro or similar for home use though - still dont rule out 'in the head' - lets face it if it had a'slowy' it would lose all of its working pressure over time and youd get a gradual but consistent deterioration in power.

 

hope this helps

 

atb

 

chris

btw you mention about leaving springers cocked in your first post - even springers should be able to be left cocked for days wih no real detremental effects.

[andyfr1968 772]

Hi, mate.

 

As has been said, the rams are always under pressure even at rest. If it's leaking, it'll leak all the time and you'll very quickly lose power.

 

Gun shop, crono. Only answer really.

 

Cheers.