Autumn Bash 17th and 18th September 2022

[baldinio]

Nice piccy Gary. That seems so long ago now. I’m guessing it was taken around 9am given that Chris has a beer on the go

Won't have been that early mate, you're awake and speaking to people we all know you don't do social interaction first thing in the morning bud

[NewPaul]

Won't have been that early mate, you're awake and speaking to people we all know you don't do social interaction first thing in the morning bud

Fair cop

[TonyL]

Won't have been that early mate, you're awake and speaking to people we all know you don't do social interaction first thing in the morning bud

Fair cop

Ah, but our LittlePaulyBoy's a slightly reformed character now and was up bright and early on a few mornings, I do believe?

[flyingfish]

Ah, but our LittlePaulyBoy's a slightly reformed character now and was up bright and early on a few mornings, I do believe?

He was on his way to bed

[Neil54]

If a gas ram could be charged with air, I could do it myself.
Now a pressure vessel. I could use the cylinder off my pcp complete with quick fill.

Now what pressure in bar would create 40kg force?

[gtfreight]

You could try digikey.co.uk. They have a conversion chart on their site.

[TonyL]

Mmmmmm.....wouldn't have a clue.. Guessing volume and stroke will need to be taken into account? Would there be any known values on gas ram rifles with valves at the rear, like the Theobens and HW90, just to get a ballpark or would the different volumes and strokes involved render that information totally useless? And I think they vary from rifle to rifle, too?

[baldinio]

If a gas ram could be charged with air, I could do it myself.
Now a pressure vessel. I could use the cylinder off my pcp complete with quick fill.

Now what pressure in bar would create 40kg force?

aren't all the modern gas rams sealed units that you can't alter the pressure on mate? If you've got one like a theoben ram with a valve in it I would say use a stirrup or scissor pump as it's easy to over fill them, the theoben ones don't take much pressure at all. There's a vast difference between the he and none he rams too in terms of operating pressure. Forgive me if I'm teaching my granny to suck eggs here by the way. Probably should have asked at the start, what ram you pressurising?

[T 20]

aren't all the modern gas rams sealed units that you can't alter the pressure on mate? If you've got one like a theoben ram with a valve in it I would say use a stirrup or scissor pump as it's easy to over fill them, the theoben ones don't take much pressure at all. There's a vast difference between the he and none he rams too in terms of operating pressure. Forgive me if I'm teaching my granny to suck eggs here by the way. Probably should have asked at the start, what ram you pressurising?

I always took it that the rod was sealed by a lip seal, Chris.

So if you put the ram in a pressure chamber and increase the chamber pressure above the ram's internal pressure, then pressure will go past the lip seal and increase the internal pressure.

Obviously, if this is how they work then you can only increase ram pressure as there's no way of letting pressure out of the ram.



All the best Mick