Regulated My S510 Carbine

[Smoketown]

S510 Striker Phase 3

Latest trial is with the 34 gram striker, stock striker spring, cross drilled pot and the stock firing valve (poppet) spring. (Regulator is as received at 135 bar.)
The bad news - The shot count is DOWN to ~60 shots before falling off the regulator.   









Next will be the 26.6 gram striker and more shots over the chronograph. 

Cheers,
Smoketown

[Smoketown]

S510 Striker Phase 3 Part B

Here are some more graphs … Now with the 26.6 gram striker.

I broke up the strings to try to get a better picture of what is happening.

At least the shot count is going up!   

I also did NO editing so it's “the good, the bad and the ugly”. (Queue the music in 3,2,1 …)   







Now, I believe that I'm going to have to rely on some of the more “seasoned” members of this fine forum to tell me exactly what it is that I'm seeing here.

Cheers,
Smoketown

[Motorhead]

The velocity shifts are IMO far too great !! ..... IMO the regulator IS NOT DOING WELL in recovering to same plenum pressure shot to shot, let alone as storage pressure changes 

Hate to be the one to state the obvious ... Loose the LANE regulator and put in a HuMa 

When you see velocity shift and stability changes within a single fill it is telling on how well regulator is detecting storage pressure and then plenum pressure adjusting the differential to be the output set pressure ( Plenum pressure )
IMO what happens as you change hammer strike, spring loads either poppet or hammer ... the amount of air used to launch pellet changes ... obviously 
But now what ever the pressure drop within plenum was, regulator needs to replace it and to what degree of accuracy it does so is in question here ?

If valve is being really effecient with just minimal sips of air per shot the recovery / replacement of plenum pressure become small .... where as if valve is thirsty dumping a lot of air, plenum pressure fall more after the shot and regulator recovers from a lower plenum pressure.

HOW WELL REGULATORS meter from a little sip or big sip from plenum is very telling on there metering precision.

Look at your set ups and shot strings seeing if correlation exists where perhaps changing plenum VOLUME may benefit regulators recovery accuracy 

Just thinking out loud here   

[Jking]

Well, for the most part "seasoned" rules me out other than age. Scott is probably right though. Way back on some of my previous strings when I first installed the Lane I'd get maybe 3-5 shots that were out of the norm with no explanation. I started watching my guns gauge very carefully and when the regulator either slightly under filled or over filled the resulting shot was the odd ball velocities. You can go back on this thread and see what I was seeing. That along with the noises (squeeks and whistles) after the shot led me to replacing the regulator with the HUMA. No issues at all after that. Jim, you might re-format your chart so that ever one or two feet velocity change isn't so noticable. Looking at the numbers for the most part the extreme spread isn't too bad untill it takes off with the eronious numbers. It might make it easier to diagnose the problem too.
jimmy

[Smoketown]

Jimmy,

On 9-11-15, I asked you about the “annoying wheezing sound” and you answered …
The problem was I already had the Lane regulator. 
Therefore it became a case of, “Run what you brung”.     

I had also hoped that the regulator would ‘shoot itself in’ but, that was at least four tins ago.   

My original graphs/charts had a much greater FPS spacing.
It looked to me like they artificially flattened the string and camouflaged too many of the warts. 

As an example, here's graphs 12-14 as above with a 50 FPS spacing …







As to what may be erroneous readings … 
Well, I couldn't afford the Oehler 35P, so I ran my Oehler 33 and my Pact Mk III on the same bar.
They typically read with in ~7 FPS of each other ...  It's my “poor man’s proof channel”.     





Cheers,
Smoketown

[Smoketown]

Scott,

Although I didn't want to hear it, thank you for the conformation …
I agree that the regulator appears to have a rather poor recovery rate.   

The way it looks now, I may be taking some measurements and sending an e-mail to Nick at Airsuperiority.

Cheers,
Smoketown

[Jking]

Hey Jim, with the Huma being shorter I had to add a spacer I made out of a aluminum electrical fitting turned down in a lathe. Seems like it was around .30" in length.
Jimmy

[Smoketown]

Oh My,

It looks like it's red Loctite time!!

While I was out “pesting” I had a number of misses and what's even worse, a few bad hits …   

I went about checking all of the screws and then put it on paper.

Patterns would have been a charitable description.   

Well, nothing to do but to open her up.

This is what I found …   

Although the rear bushing had what appeared to be a glob of glue/adhesive in front of it, the front one appears to have been put in dry.

Of course, my grinding on outside of the striker had nothing to do with it loosening up …   

I did talk to Nick and he will be sending a HuMa Regulator for a .25 cal Air Arms as it has the longest spacer.   

Hopefully, the spacer will be ‘long enough’.   



Cheers,
Smoketown

[Jking]

I was wondering how tight those bearings were and how to get them out if I ever needed to. I guess all the grinding you did got things pretty warmed up. If your bushing isn't long enough for your new regulator let me know and I'll see if have some material to make you one out of. I just got a stock of Delrin and aluminum so I should be able to help if needed. I would think delrin would work ok in the high pressure application. Either way I have both.
Jimmy

[GarthThomas]

You don't think that removing that much material from the hammer has created something wobbly?

[LDP]

You don't think that removing that much material from the hammer has created something wobbly?

Im not sure what you are saying. Why would lightening the hammer cause wobble? The S510 hammer doesnt ride on the outside but rides on a guide rod thru the middle of the hammer.

[GarthThomas]

OK, I did not know that:) It was just that those shot cycles looked so erratic I thought maybe it was more than the reg.

[Smoketown]

I was wondering how tight those bearings were and how to get them out if I ever needed to. I guess all the grinding you did got things pretty warmed up. If your bushing isn't long enough for your new regulator let me know and I'll see if have some material to make you one out of. I just got a stock of Delrin and aluminum so I should be able to help if needed. I would think delrin would work ok in the high pressure application. Either way I have both.
Jimmy

Jimmy,

Thank you for the very generous offer !!

Hopefully, the .25 cal. plenum spacer will be long enough.

As far as the bushings go, there is a small lip and you'll need a long pin punch but, I think that they only come out when you DON'T want them to ...   

Cheers,
Smoketown