Author Topic: Lockdown beater  (Read 2469 times)

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Offline Baggawind

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Re: Lockdown beater
« Reply #40 on: May 29, 2020, 10:49:04 AM »
No, but I did suggest he changes the design to an 8 shot , like the originals.

Offline Gambo

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Re: Lockdown beater
« Reply #41 on: May 29, 2020, 05:09:26 PM »
What was his response mucker? ???

Offline Baggawind

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Re: Lockdown beater
« Reply #42 on: May 30, 2020, 08:52:34 AM »
Nothing at this time . I,m still waiting for a special E-bay label from him as i don,t have a printer. That means I still have the mags.

Offline Gambo

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Re: Lockdown beater
« Reply #43 on: May 30, 2020, 12:56:09 PM »
Please keep us informed mucker. ;)

Offline Baggawind

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Re: Lockdown beater
« Reply #44 on: May 30, 2020, 04:30:14 PM »
In the meantime i,ve been putting the compressor back together. And boy, what a job. I,m the guy who could build the most difficult motorcycle engine but this thing has driven me nuts. Firstly, the gasket set was not complete then after screwing it all together , a burst disc blew for no reason at all - it,s happened before. Then on replacing that the bloody head gasket blew. Stripped down again i discovered one very thin corner had broken. Bo..ocks. So I had to make a new one from some very old material left over from the Velo days. Good job I hadn,t thrown it away. Got it running again and , no pressure. Took the top off and tried to figure what was wrong. There are two leaf valves in the high pressure head and they have to fit the right way round. Found a demo on You tube and, guess what , they are supposed to be different in shape but not by much. And guess who,s are both the bloody same. Tried it one way and it only reached 500psi . So down it came again . This time I fitted one valve different to the video and lo and behold , the damn thing worked. I wonder how long the flippin thing will keep working . Knowing my luck , not long  :'(

Offline Gambo

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Re: Lockdown beater
« Reply #45 on: May 30, 2020, 08:51:36 PM »
Hey.......you got it working Mel, that's all you can do. 8)

How long it works for is out of your hands.....so just say three Hail Mary's and keep your fingers crossed....coz again, that's all you can do!! ;)

Offline Baggawind

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Re: Lockdown beater
« Reply #46 on: August 05, 2020, 01:49:11 PM »
I,ve been mucking around with the "Bitza" rifle. I wasn,t happy with the fluctuations in velocity. The hammer side bolt was partly to blame, it was rubbing on the stock. A couple of strokes with a file cured that. Then i decided to try the rifle minus reg. I was still getting the spikes in velocity. Turns out it was the trigger. It was a simple design , a pin holding back the hammer . Then, when pulling the trigger, it dropped the pin letting go the hammer. Trouble was, if i squeezed the trigger slowly the pin rubbed against the underside of the hammer, slowing it down. So I spent a couple of days making a two stage trigger. It still uses a pin to hold the hammer back but now the trigger breaks cleanly. It still rubs slightly - like a Falcon unit - but at least it is consistent. The remarkable thing is, the rifle is producing 65 very consistent shots from only  130 bar - similar to the last two pistols i made. Don,t know why, i,m not that clever , but i,ll take it  :). And with the SMK pr900 barrel using jsb,s it,s damn accurate.

Offline Gambo

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Re: Lockdown beater
« Reply #47 on: August 06, 2020, 07:34:55 PM »
Are you getting 65 SPC from a 130bar max fill pressure.....or is it using up 130bar to make it's 65 shots Mel? ???

Offline Baggawind

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Re: Lockdown beater
« Reply #48 on: August 07, 2020, 11:05:38 AM »
65 down to 85bar from a 130bar fill. Don,t ask why, i,ve no idea. But most of my home builds seem to like running on a low charge. The last two pistols i made also ran from about 135bar.

Offline Gambo

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Re: Lockdown beater
« Reply #49 on: August 08, 2020, 11:28:31 AM »
Gottit!!! ;)

So it's using 45bar to provide 65 shots.

At what power Mel?