Username:

Password:

Recent Posts

Pages: [1] 2 3 ... 10
1
For Sale, Wanted, Spotted / Wanted - Baikal IZH61 air rifle.
« Last post by Mintie on Today at 12:05:50 PM »
Pretty keen to add one of these to the collection... Anybody know where I could find one? New or used and either IZH61 or IZH60.

Thanks
2
For Sale, Wanted, Spotted / Re: Chrony
« Last post by Westaucklandman on Today at 09:08:43 AM »
Have a cheap one, only used a few times, seems to be about 20fps off but is consistent. Looking for
$80
3
General Discussion / Dieseling
« Last post by Novagun on Today at 09:04:50 AM »
The following is a thread borrowed from the GTA forum.  I could not bring across the Tom Gaylord video so perhaps someone can do that. ------

Hey guys I was watching some Airgun Academy videos on YouTube, and Tom Gaylord was talking about lubricating piston seals when he claimed that it is normal for the air gun to diesel and produce some smoke in the barrel that you can blow out after firing it, but that "detonation" is what most people are talking about when there's a loud bang.

But it doesn't seem like having smoke wafting through your barrel is really optimal either, and it seems to be where there's smoke, there was fire.

So what should I think about this?

 My reply is as follows :-

Dieseling is normal  - probably so with leather seals lubricated with hydrocarbon oil. Not so the silicon oil. However you look at it dieseling is undesirable.
With use of silicon oil and grease it can be eliminated and of course Krytox.
I think the important point is that silicon is not a good lubricant for steel to steel contact but is good for steel to synthetic.
Tom Gaylord was not wrong but it would have been interesting to hear his views on the Krytox type lubricants.

Looking at the video the smoke seems excessive for an acceptable amount of dieseling and the gun did go off with a crack. As an aside in New Zealand an air gun that is dieseling and more so detonating becomes, by legal definition, a firearm for which you need a licence.

Nevertheless an interesting and worthwhile video.

Of interest,  I have just read an article in an old South African magazine about velocity inconsistency in an airgun of 20 fps.  It said that over a range of 30 yards the pellet drop caused by the velocity drop is one ten thousandsth of an inch. So how much extra velocity do you get from dieseling and how much variation between each incident of dieseling.

Does it matter?


4
For Sale, Wanted, Spotted / WTB: Hand Pump
« Last post by username01 on April 25, 2018, 05:13:35 PM »
Will be buying one new soon, so thought I'd try my chances on the forums first.

Cheers
5
For Sale, Wanted, Spotted / Chrony
« Last post by PCP nut on April 25, 2018, 11:50:39 AM »
WTB chrony if you have one & no longer use it please email me with a price I know a new one will run me to $250 at least so best prices please

thanks
6
For Sale, Wanted, Spotted / Re: Hawke Sidewinder 30SF
« Last post by Busta on April 24, 2018, 07:54:24 PM »
If your interested,

0220117001      Peter.
7
For Sale, Wanted, Spotted / Hawke Sidewinder 30SF
« Last post by Busta on April 24, 2018, 07:51:07 PM »
Sidewinder SF30 8-32 X 56 as new, with decent 30mm rings!

$500 posted.

Shown fitted to a CZ Evolution.
8
For Sale, Wanted, Spotted / Re: Dragon slayer .50cal
« Last post by Parallax on April 24, 2018, 07:10:50 PM »
thanks mate ! will do.
cheers
9
For Sale, Wanted, Spotted / Re: Dragon slayer .50cal
« Last post by Wingman on April 24, 2018, 06:34:23 PM »
I tuned this one but no longer tune PCPs for others. Contact Ian at Youngs airguns and he will help you out.
10
For Sale, Wanted, Spotted / Re: Dragon slayer .50cal
« Last post by Parallax on April 24, 2018, 02:22:52 PM »
Hey Wingman
do you know who did the modifications on this rifle?
Just bought a dragon slayer and would like to get it a bit tuned.
Cheers
Parallax
Pages: [1] 2 3 ... 10