 |  | | | |  | |  |  | New Webley SSP |  | |  |  | |
 Posted: Sat Jan 30, 2010 11:32 am |
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| rsterne |
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Looks interesting...
http://www.youtube.com/watch?v=pJGKkL7vxy4&feature=sub
Clever idea.... as I understand it, there is a very small piston in the "valve" with disc springs compressed when you "reset" the valve with the lever on the back.... Then you pump 1000 psi of air into the valve with a single stroke of the pumping arm.... When you pull the trigger, the piston is released, compressing that 1000 psi charge to a higher pressure which is collected by the fancy shaped valve face and directed to the transfer port, firing the pellet with a charge of what, maybe 3000 psi?....
EDIT: see post below.... 
I guess you could consider this gun a combination pneumatic / springer in the way it functions.... or a "spring assisted pneumatic".... Since we all love acronyms so much.... how about we call this a SAP.... 
Bob |
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Last edited by rsterne on Sat Jan 30, 2010 12:51 pm; edited 1 time in total
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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count! |
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| Posted: Sat Jan 30, 2010 12:44 pm |
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| rsterne |
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OK, so I didn't quite get the operating system correct.... The "reset" lever closes the transfer port and the trigger opens it.... When you cock the gun, the disc springs are compressed by the air pressure inside.... storing energy in the disc springs that is released when you fire the gun.... 
It's still a single stroke pneumatic assisted by the compression of the (disc) springs, however.... an SAP.... 
Bob |
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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count! |
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| Posted: Sat Jan 30, 2010 1:07 pm |
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| Verado |
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| Looks like a pretty well thought out piece of engineering. Also looks like more stuff to go wrong in my opinon |
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| Posted: Sat Jan 30, 2010 4:43 pm |
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| Alstone |
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To me it looks like the air is compressed between multi spring and the trigger/piston unit, to a pressure of 70 bar, which also holds the spring unit in compression? When fired and the pressure drops, the spring releases at a controlled rate to maintain a constant pressure in the transfer port?
Is that what your conclusion is Bob?
Al
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| Posted: Sat Jan 30, 2010 6:32 pm |
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| broommaster2000 |
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| Hm, still think cocking it looks way to funny and the idea of putting the rifle between your legs to be able to put the cocking lever back where it belongs... Interesting concept, but in my eyes poor aesthetic execution. |
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| Posted: Sat Jan 30, 2010 6:59 pm |
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| Alstone |
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| broommaster2000 wrote: |
| Hm, still think cocking it looks way to funny and the idea of putting the rifle between your legs to be able to put the cocking lever back where it belongs... Interesting concept, but in my eyes poor aesthetic execution. |
Your right Anton, not really suitable for shooting any way but standing
Al |
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| Posted: Sat Jan 30, 2010 10:29 pm |
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| kanyon |
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Did anyone notice this....
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| Posted: Sat Jan 30, 2010 10:35 pm |
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| rsterne |
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| Quote: |
| the spring releases at a controlled rate to maintain a constant pressure in the transfer port |
I agree, except the "controlled rate" is almost instantaneous.... I think what happens is that when you pull the trigger, effectively "uncorking" the transfer port.... the disc springs decompress so that the air pressure between them and the transfer port is a constant 70 Bar until they reach the limit of their travel.... at which point the air pressure continues to drop to zero....
There can be no such thing as "retained air" with this design as the transfer port remains open until "reset" by the rotating cam on the back of the receiver.... There is no reason that the SAP part of the design could not be incorporated into any SSP.... You would need to eliminate the "front half" of the valve (the check valve would be in the piston) and just insure that the dwell time of the exhaust valve was long enough so that the gun was a "pump and dump".... 
It would seem to me that the limiting factor is the 1000 psi pressure and the volume of the valve (ie the room between the disc springs and the valve face.... I wonder if this is brand new.... or was it done 100 years ago like everything else in airgunning....
Bob |
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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal: Too many to count! |
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| Posted: Sun Jan 31, 2010 5:38 am |
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| Alstone |
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| kanyon wrote: |
Did anyone notice this....
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I missed that one Pete, someone can keep secrets. I would say that I'd be surprised if Webley did design and build in the UK, more than likely they bought the design and prototype here?
Personally I would be surprised if it ever comes on the market. 
One good thing about Webley is they are producing a limited edition of the Webley Tempest pistol with 6flb output in .177 and .22. £199.00.
I might see if I can get one. |
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