Just how much care is needed when dismantling PCP's?.....

User avatar
rogers1
Posts: 91
Joined: Sun Feb 15, 2015 5:04 pm

Just how much care is needed when dismantling PCP's?.....

Mon Sep 14, 2015 9:35 pm

check this out guys and girls.
https://youtu.be/a1hrms0i2LU
Lucky, lucky guy.
AA TX200 MkIII in .177 with a Viper
AA Ultimate Sporter in .177, JSR scope
Weihrauch HW45 in .177, No glass, save my old, weary eyes....

User avatar
Geordie
Posts: 1063
Joined: Sun Feb 15, 2015 1:59 pm
Location: Newcastle Upon Tyne

Re: Just how much care is needed when dismantling PCP's?....

Mon Sep 14, 2015 9:45 pm

:shock: :shock: :shock:
Nasty looking wound there. Just goes to show PCP,s need handling with great care :o
AA s410K .177
BSA R10 .177 Super carbine. (Blacky)


Image

no avatar
eboswan
Site Admin
Posts: 3222
Joined: Sun Feb 15, 2015 9:16 am
Location: swansea

Re: Just how much care is needed when dismantling PCP's?....

Mon Sep 14, 2015 9:48 pm

:shock: :shock: lucky guy
IS MY SIGNATURE BIGGER THAN RAYS. Cz 452 american .22+sak mod
S200. .177

User avatar
darran77
Posts: 209
Joined: Wed Feb 18, 2015 12:53 am

Re: Just how much care is needed when dismantling PCP's?....

Mon Sep 14, 2015 10:00 pm

Very lucky to be alive looking at where the other bit's ended up (in the ceiling) it could have been much worse.
daz
IFAC member

User avatar
Blackbaronfish
Posts: 3690
Joined: Sun Feb 15, 2015 6:20 pm
Location: Nuneaton

Re: Just how much care is needed when dismantling PCP's?....

Mon Sep 14, 2015 10:05 pm

They pack a punch don't they :shock: . Very lucky

BBF
Did I mention that I'm the only one to have attended EVERY meet since we started

no avatar
singlespeed
Posts: 39
Joined: Fri Jun 12, 2015 6:01 pm

Re: Just how much care is needed when dismantling PCP's?....

Mon Sep 14, 2015 10:41 pm

Ouch. I dont know how something that large almost made it through his thigh without hitting an artery major nerve.

Definitely worth dumping the air from the cylinder before working on it. Yes its a bit of a waste but you can always get a refill. For multiple test stripdowns whilst fitting a regulator, installing a dowel in the air receiver massively reduces the waste :)

no avatar
Mark112
Posts: 210
Joined: Mon Feb 16, 2015 5:25 pm

Re: Just how much care is needed when dismantling PCP's?....

Tue Sep 15, 2015 7:14 am

Hmmmm. So this is a rifle designed for CO2 and converted to run on compressed air at a much higher pressure than it was designed for? Or am I missing something?
S410C .177 Regged - MTC Viper 4-16 x 50
S410K .177 Regged - Hawke Nite-Eye 4-16 x 50 AO IR
S410K .22 - Hawke Sport HD 3-9 x 50 AO IR
Logun Mk1 .22 - AGS 3-9 x 40
Theoben Taunus .22 - Simmons 4-12 x 40 AO
BW1911R2
Walther CP99
Webley Premier .22

no avatar
Axelrod
Posts: 109
Joined: Sun Feb 15, 2015 3:44 pm
Location: Almeria Spain.

Re: Just how much care is needed when dismantling PCP's?....

Tue Sep 15, 2015 10:12 am

A little knowledge is a dangerous thing. American videos show more stupid mods in the search for power than any other nation. I have to wonder what their definition of accuracy is? dave

User avatar
Sake-san
Posts: 551
Joined: Mon May 18, 2015 7:28 pm

Re: Just how much care is needed when dismantling PCP's?....

Tue Sep 15, 2015 10:20 am

What can you reasonably expect from a nation who once elected G Bush and now seems rather set on D Trump!, with people like that in power I think that I too might well desire the "right to carry arms" 8-)
TX200/Gary Cane/Sightron SIII 10-50x60
TX200/Gary Cane/Sightron SIII 10x42
TX200 test / analysis gun

no avatar
Mason
Posts: 164
Joined: Sun Feb 15, 2015 5:01 pm

Re: Just how much care is needed when dismantling PCP's?....

Tue Sep 15, 2015 11:08 am

People sometimes forget the immense forces that high pressures will apply to the surfaces of a component. 200 bar equates to 1.5 tons per square inch or 2i2 tons per square foot..pretty hefty.
The pressures applied to the threads is equally high; and with constant disassembly and reassembly the threads will wear especially when a soft metal such as aluminium and a harder metal such as brass or steel engages with it. The threads are not perfectly smooth and will file away material to a lesser or greater extent every time they are inserted or removed especially when overtightened. Aluminium is very suseptable to this and is known as balling. So when servicing high pressure equipment always inspect the threads with a magnifying glass and discard them if the threads show signs of wear. This may appear as grooved surfaces on the thread's wall, or rounding of the thread profile or conversely they may become pointed and sharp. Excessive movement between the two parts before tightening is an indicator the the parts should be discarded.
Keeping the threads clean will reduce this wear but not eliminate it....always inspect!
Even relatively low pressures can inflict a surprising amount of force...here's someone stabbing a lorry tyre for fun.... :shock:

https://www.youtube.com/watch?v=enRKvjKr7l0

Stay safe

Post Reply

Who is online

Users browsing this forum: No registered users and 86 guests