Attention all Webley Longbow Guru's

[Jonnymac]

managed it :-)

[Mach 1.5]

Doesn't look like an inlay but an issue with the finish maybe? Is it a brum one or Turkey? Or has someone try to sleeve it to a reduce cylinder!! One thing is they didn't leave the factory like that well I hope they didn't. Mach 1.5

[Jonnymac]

Doesn't look like an inlay but an issue with the finish maybe? Is it a brum one or Turkey? Or has someone try to sleeve it to a reduce cylinder!! One thing is they didn't leave the factory like that well I hope they didn't. Mach 1.5

Its a Brum one. Late 2005 I think
There is a clear defining line between the blued trigger section and the compression tube. It doesn't look like a finish issue

[ashf9999]

…One thing is they didn't leave the factory like that well I hope they didn't. Mach 1.5

Unless slug-gun has any ‘unusual’ factory notes on this? I’d have thought that even if, for example, they accidentally over-bored a set of cylinders, they’d have either scrapped them or maybe gone with an oversize piston (affect on seal size?), rather than trying to deposit a layer back.

Odd

[Jonnymac]

So what is the overall consensus?
Do I try and smooth it out with some wet n dry?
Or leave it as is, allowing the Moly grease to sit in the microgrooves?

[Shed tuner]

smooth it out, it's not going to seal otherwise

[ashf9999]

Agreed. It really needs a hone and polish, but watch that the minimum of material is removed. Unless you’re very confident and have the tools, maybe find a local engineering company. Hopefully the parachute seal will take up the slack sufficiently.

[rapidresponse1]

not seen that before

[mattyw1987]

I’ve got a spare Aussie piston seal that are a bit snugger than original bud and way better so if you end up needing one let us know.

Cheers.

[maximus]

Is there a step between the two finishes? If not it might just be discolouration of the original blued finish where the piston has been running, though it is unusual. If there's no step, no burrs and no scoring where the seal runs then it should be ok really but a light polish with some 400 grit wet and dry won't do any harm.

[Jonnymac]

I’ve got a spare Aussie piston seal that are a bit snugger than original bud and way better so if you end up needing one let us know.

Cheers.

Thanks buddy. I got a purple one from chambers, but if that one is better, I could be interested. What did you want for it?

[weebster]

Could it be someone has experimented with copper slip grease?, the kind used for rear of brake shoes on motors, it would certainly explain the start/stop lines, it looks to me its some kind of residue left behind which would point to something having been applied to the piston

[Murphy]

Show us a picture of where it says longbow on the cylinder.

[Jonnymac]

Show us a picture of where it says longbow on the cylinder.

[evert]

So what is the overall consensus?
Do I try and smooth it out with some wet n dry?
Or leave it as is, allowing the Moly grease to sit in the microgrooves?

Looks to me like bluing discoloration.
How does it feel when you push a sealed piston on and down the compression chamber?
Dad has a Birmingham made Tomahawk of the same vintage that has a very rough compression chamber surface,
it has what seems to me machining ridges.

Tubes like this really need a brass plug hone.