Shooting the breeze The BSB Butt Pad  
Go Back   Shooting the breeze > The Chat > General Airgun Chat

General Airgun Chat Chat and banter that doesn't fit anywhere else...

Reply
 
Thread Tools Display Modes
  #21  
Old 17th October 2016, 10:48 PM
DYNO DAVE DYNO DAVE is offline
Senior Member
 
Join Date: Jan 2009
Member of: Dunfermline
Location: Dalgety bay fife
Posts: 359
Default Ftp

Hi Brian , I don't know but when you block the hole it dose affect the firing cycle I have tried it before on one that a friend said it was bothering him , when the hole is clear it works a treat block it and the gun changes , I've got one at the moument I'm working on I'll play around with it and let you know what I think it's doing.
Regards Dave
Reply With Quote
  #22  
Old 17th October 2016, 11:01 PM
Evo's Avatar
Evo Evo is offline
Bob Evans
 
Join Date: Dec 2015
Member of: ByleyFTC
Location: wirral uk
Posts: 317
Default

crickey, we have opened a can of worms, i,m gonna strip mine down now just to have a nosey at this hole
__________________
Air Arms FTP900 nikko diamond sportsman10 x 50 x 60
OSTLER FTP900 nikko diamond sportsman10x50x60
Reply With Quote
  #23  
Old 17th October 2016, 11:14 PM
vinny's Avatar
vinny vinny is offline
WHFTA 2015 World Champion
 
Join Date: Mar 2014
Member of: M.A.D
Location: essex
Posts: 620
Default

Quote:
Originally Posted by Evo View Post
crickey, we have opened a can of worms, i,m gonna strip mine down now just to have a nosey at this hole
Tench explained this in an earlier thred I cant find, it is meant to do it, apparently other guns do it as well only in a less crude way, I reckon the foams there to stop dust ingress, incidentally my hamsters shown all the way in still with at least 10mm away from the hole, ive never bothered fitting a dust cover as the force of airs gonna blow stuff out,



Cue some commnt about othe guns normally let the air out the barrell
__________________
H.G.H , aspiring to spring power

FTP900 MTC connect,Welhamanium internals -sorted
HFT500, ACZ stock MTC connect
TX200 Mk3 CS1000 stock, hawke vantage sf , Nick G internals
Steyr ?, maybe , they cant all be wrong?
Reply With Quote
  #24  
Old 18th October 2016, 09:25 AM
Brian.Samson's Avatar
Brian.Samson Brian.Samson is offline
Allowed in Sales
 
Join Date: Jun 2009
Member of: Pontefract, Doncaster Airgun Range
Location: Doncaster
Posts: 2,462
Default

I asked Nick M about the bit of foam when we noticed it.

Nick said that the Pro-Target, EV2 and FTP all vent air out of a hole in the bottom of the action. What he thinks though is that with the hole being directly above the hamster post, if you use the FTP without a hamster people may have been reporting that they can feel an 'air leak'. So his theory is that the foam is there to cure that problem (people complaining about an air leak that's actually normal for the rifle).

Seems odd that it has an effect on performance, I'm struggling to understand why that is (not saying it's not true, I just don't understand why?).

I may remove the foam on mine then, but I'll do a before and after chrono check. If air is vented out on every shot, it's doesn't seem likely that it's there to protect from dust - Nick's theory about complaints of air leaks sounds more plausible.

But then again, who knows? - I'm still struggling to understand why AA decided to fit that huge chunk of metal under the stock and a floated barrel that isn't floated ?
Reply With Quote
  #25  
Old 18th October 2016, 09:30 AM
Brian.Samson's Avatar
Brian.Samson Brian.Samson is offline
Allowed in Sales
 
Join Date: Jun 2009
Member of: Pontefract, Doncaster Airgun Range
Location: Doncaster
Posts: 2,462
Default

Quote:
Originally Posted by DYNO DAVE View Post
Hi Brian , I don't know but when you block the hole it dose affect the firing cycle I have tried it before on one that a friend said it was bothering him , when the hole is clear it works a treat block it and the gun changes , I've got one at the moment I'm working on I'll play around with it and let you know what I think it's doing.
Regards Dave
Cheers Dave, that would be interesting.

I don't think it's a huge blast of air, more a puff of air that comes out. It might be that having foam over the hole still lets out enough air for it not to reduce power.

If you make the hole bigger, does it improve performance i wonder? Curious about why it would affect power
Reply With Quote
  #26  
Old 18th October 2016, 10:07 AM
vinny's Avatar
vinny vinny is offline
WHFTA 2015 World Champion
 
Join Date: Mar 2014
Member of: M.A.D
Location: essex
Posts: 620
Default

Quote:
Originally Posted by Brian.Samson View Post
I asked Nick M about the bit of foam when we noticed it.

Nick said that the Pro-Target, EV2 and FTP all vent air out of a hole in the bottom of the action. What he thinks though is that with the hole being directly above the hamster post, if you use the FTP without a hamster people may have been reporting that they can feel an 'air leak'. So his theory is that the foam is there to cure that problem (people complaining about an air leak that's actually normal for the rifle).

Seems odd that it has an effect on performance, I'm struggling to understand why that is (not saying it's not true, I just don't understand why?).

I may remove the foam on mine then, but I'll do a before and after chrono check. If air is vented out on every shot, it's doesn't seem likely that it's there to protect from dust - Nick's theory about complaints of air leaks sounds more plausible.

But then again, who knows? - I'm still struggling to understand why AA decided to fit that huge chunk of metal under the stock and a floated barrel that isn't floated ?
Hi Bri , I don't think its the air escape is there to protect from dust , just the effect of the air escaping at that velocity seems to negate the requirement for the foam , but as you described it may be there to deflect it away from concerned owners
__________________
H.G.H , aspiring to spring power

FTP900 MTC connect,Welhamanium internals -sorted
HFT500, ACZ stock MTC connect
TX200 Mk3 CS1000 stock, hawke vantage sf , Nick G internals
Steyr ?, maybe , they cant all be wrong?
Reply With Quote
  #27  
Old 18th October 2016, 10:14 AM
Brian.Samson's Avatar
Brian.Samson Brian.Samson is offline
Allowed in Sales
 
Join Date: Jun 2009
Member of: Pontefract, Doncaster Airgun Range
Location: Doncaster
Posts: 2,462
Default

Quote:
Originally Posted by vinny View Post
Hi Bri , I don't think its the air escape is there to protect from dust , just the effect of the air escaping at that velocity seems to negate the requirement for the foam , but as you described it may be there to deflect it away from concerned owners
From your findings, it sounds like it's much more than just a puff of air coming out. I wonder if someone who knows more about regs n stuff ( ahem - Where's Tench when you need him ) could shed any light on what the reason for the venting is?

Shame they couldn't use that spare air to drive some sort of stabiliser mechanism to deaden the rifle a bit.
Reply With Quote
  #28  
Old 18th October 2016, 11:43 AM
blacklab's Avatar
blacklab blacklab is offline
Senior Member
 
Join Date: Aug 2012
Member of: nelson
Location: pontypridd
Posts: 453
Default breath hole

Have a look at this
https://www.youtube.com/watch?v=mVMVFXI8z_0
Reply With Quote
  #29  
Old 18th October 2016, 12:06 PM
Brian.Samson's Avatar
Brian.Samson Brian.Samson is offline
Allowed in Sales
 
Join Date: Jun 2009
Member of: Pontefract, Doncaster Airgun Range
Location: Doncaster
Posts: 2,462
Default

Quote:
Originally Posted by blacklab View Post
There's a breathe hole in the cylinder for the reg as well as this extra vent - I think
Reply With Quote
  #30  
Old 18th October 2016, 02:47 PM
C.Eaton's Avatar
C.Eaton C.Eaton is offline
Senior Member
 
Join Date: Aug 2011
Member of: ETL / TEGC
Location: Hockley, UK
Posts: 437
Default

If it's the hole under the action I seem to remember someone saying a while ago that this was the vent hole for the hammer which makes sense if think about it; impede it and the hammer can't move as readily as it would like so affects performance and all that.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT. The time now is 12:09 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
shooting-the-breeze.com Skin design and concept by Attitude