Search found 89 matches

by RossM
Fri Oct 07, 2011 4:54 am
Forum: Olympic Rifle - Air and Smallbore
Topic: air tank ?'s
Replies: 20
Views: 10060

One thing I had better clarify. Reading my last post makes it appear I am talking about filling 200b cyclinders to 300b. That is not what I mean at all. What I am trying to suggest is that attempting to fill 200b cyclinders from a 300b tank is to seek trouble from inadvertently overpressurising the ...
by RossM
Thu Oct 06, 2011 9:43 pm
Forum: Olympic Rifle - Air and Smallbore
Topic: air tank ?'s
Replies: 20
Views: 10060

Hysterical? I don't recall being hysterical. I agree "some" cylinders have been tested to "way above" their useful pressure. I would posit that every cylinder is not taken up to this test pressure. It is a design and test pressure only. I defy any engineer to then tell you that i...
by RossM
Thu Oct 06, 2011 4:56 am
Forum: Olympic Rifle - Air and Smallbore
Topic: air tank ?'s
Replies: 20
Views: 10060

From the same article about the stored energy: "The pressurized air normally used is at 3000 PSI (pounds per square inch) and has enormous energy potential. The kinetic energy potential contained within an average SCUBA tank is 1.3 MILLION foot-pounds. This is enough energy to lift a 100-ton di...
by RossM
Thu Oct 06, 2011 4:53 am
Forum: Olympic Rifle - Air and Smallbore
Topic: air tank ?'s
Replies: 20
Views: 10060

The article linked to above has this pertinent comment: "It is NOT recommended that any 300 bar/4300 psi tanks be used at airgun events due to the possibility of someone over pressurizing their 3000 psi rated cylinder. I know some colleges are exploring the possibility of using the 300 bar tank...
by RossM
Thu Oct 06, 2011 4:47 am
Forum: Olympic Rifle - Air and Smallbore
Topic: air tank ?'s
Replies: 20
Views: 10060

Tanks

I can't believe I am reading these comments folks. If you want to kill yourselves or others then go ahead and fill a 200b air rifle cyclinder with a 300b bottle and no regulator. The danger of inadvertently overfilling by a sudden inflow of air and then having to quickly empty it.........More import...
by RossM
Tue Sep 20, 2011 9:58 pm
Forum: Olympic Rifle - Air and Smallbore
Topic: Evolution of the shot release breathing cycle?
Replies: 18
Views: 3915

One other point worth noting. My experience of military rifle shooting is that it is deeply entrenched in the breath in and hold technique. I suspect when there is lead flying around being relaxed may not be the best idea while trying to shoot. I can't help thinking that 60s and 70s was still well p...
by RossM
Mon Sep 19, 2011 10:42 pm
Forum: Olympic Rifle - Air and Smallbore
Topic: Evolution of the shot release breathing cycle?
Replies: 18
Views: 3915

Breathing

Funny you should mention it. I too have been brought up on the shooting on the "comfortably empty" breathing sycle. A few years ago I noticed a NZ shooter doing the breath in and hold technique. He is the only one I have EVER seen of those I have watched. And i have watched all the way to ...
by RossM
Tue Sep 06, 2011 11:58 pm
Forum: Olympic Rifle - Air and Smallbore
Topic: Odd sight picture problem - any ideas?
Replies: 23
Views: 6105

Hi
I don't think a blinder over the other eye will be the issue. But I had a trial with my rifle after thinking about it and I'd seriously look at the upper bridge of the right side of the nose / inner eyebrow coming down too low. It certainly gives a 4 oclock flat on my backsight!!!!
by RossM
Mon Sep 05, 2011 1:17 am
Forum: Olympic Rifle - Air and Smallbore
Topic: Odd sight picture problem - any ideas?
Replies: 23
Views: 6105

Odd Eye picture

Try this trick. Make a small hole in a card about 1mm diameter. (1/16 inch or so for you USAers.) Looking straight ahead, hold this card about 50mm from the eye. With another card, and while keeping the bottom of it horizontal, slowly move it down while holding it against your eyebrow. Eventually it...