Now
considering that Abbey are relatively new to the Airsoft scene,
that's rather an impressive line up. Abbey have actually been
producing airgun/pistol and shotgun products for some time,
so taking up the Airsoft reigns is not such a huge step for
them to take.
So
lets see what Abbey's products are like.
HFC134a
Predator Gun Gas: Now truth be told I run HFC22 is most
gear I have, I just accept the consequences of the higher power
gas and stick with one bottle in the cupboard. The reason is
simply really I couldn't source and HFC134a a few years back
(it was quite rare/expensive back then) and simply stuck with
what I knew.
"...Abbey
Predator Gun Gas 134a will improve power and performance: Abbey
Predator Gun Gas 134a is available from major airsoft dealers
throughout the country and on the internet.
134a
is a safe nonflammable gas ideally suited for airsoft gas powered
guns. Many manufacturers specify this gas for their guns. Abbey
Supply Company have incorporated a new high specification lubricant
UPL to provide maximum lubrication to the seals and internal
mechanisms of the gun. Ensuring the gun is working correctly
with the right lubricant is essential for maximum power and
performance. The level of lubricant has been set to make this
gas exceptionally good in hop-up guns.
Mr
Chris Macdonald, Managing Director of Abbey Supply Company Ltd,
says 'Abbey Predator Gun Gas 134a delivers improved performance
and accuracy making this the gas best suited for skirmishing
or plinking. Its large capacity also makes it economical to
use.'..." Abbey
press release 19 March, 2003
Abbey's
development trials matched the HFC134a with this high tech lubricant
by the name of UPL, which is apparently prefect for internals
of Airsoft guns.
Gas
tests: Given that I'm very used to HFC22 I didn't quite
know what to expect when trialing the new HFC134a, but I didn't
need to be worried.
The
most sensible test to conduct was usability, so I took several
GBBs out the toy cupboard that had never had HFC134a breathed
through them. Tests were conducted at 15-18 deg C and conducted
with a selection of pistols.
First
up in the test was the KSC M93r (what else?). Being a full auto
GBB, this really was the ultimate test for a gas, as good old
HFC22 had a habit of freezing up and slowing down somewhat in
normal use for me. With both 93rs (1st and 2nd gen) the rate
of fire was very good, and there was no cooldown, and blowback
was also very impressive, both in full-auto and semi modes.
Please
note: KSC do not recommend firing the 93r in full auto for
extended periods of time as it tends to dry out the gas o-rings.
Next
up was the WA Shibuya Striker, a fairly standard WA single stack
1911 copy. As you'd expect blowback was crisp and again no cooldown
was apparent.
The
last test was with the Tanaka M629. There's little to go wrong
with this piece, but I was interested in trying it out with
the 134a to see how the hopup faired. With Abbey;s 134a power
was good, and the shots were very consistent.
Abbey's Predator 134a ran through the three test pieces like
a charm. Power was slightly lower than that achieved with HFC22
in the same conditions but much like the old Pepsi challenge
you'd need to have to try both gases at the same time to really
spot the minor difference. The lube consistency is spot
on with Abbey's 134a, as tests on each replica showed proper
lubing after a few magazines, and no evidence of either drying
caused by too little lube, or over greasing caused by too much
silicone content.
Chrono
tests: As mentioned in the last review, my chrono has gone
walkies so I'm unable to chrono and compare gases at the moment.
When I get a replacement I'll update this review with gas FPS
comparisons between 134a and 22.
Take
two bottles to a skirmish? Well I never used to take two
different bottles to skirmishes, but I'd consider myself converted.
After the SpeedComp died with catastrophic slide breakage (under
HFC22) I'll be using HFC134a in the less 'robust' gas replicas
I have here.
Gas
content: Predator 134a contains UPL "a high performance
lubricant, especially formulated for the seals and internals
of your gun". At this time I don't know the specific
chemical construct of this lubricant, nor it's specific quantities
in Predator 134a.
Can:
When you buy gas, your not just buying the gas, but the container
that it comes in. With that in mind it's worth taking into account
the bottle you get it in. Abbey's can is somewhat of a welcome
change from the GreenGas I'm used to using -I've had several
greengas cans dint worryingly on me after being dropped and
more than a few metal nozzles get bent and then leak gas all
over the shop.
Abbey's
134a comes in a nice thick walled can with a good nylon nozzle,
and it's certainly more field resistant. The nylon nozzle means
that it's easier to achieve good gas seals when refilling mags,
and that you're incredibly unlikely to damage your inlet valves,
as you so easily can with a damaged metal nozzle.


The
only point of note is that Abbey's gas nozzle won't reach
the gas inlet valve on a mag with a rubberized bumper
such as a WA single stack bumpered mag, the Tanaka revolver
inlet, or the KSC M9 mag, as shown in the inset image
here (standard mag to the left, bumpered on the right).
That's
not a criticism of Abbey's gas can, as you'll find
the same is the case with all other gas brands available
at the moment (22, 134a or otherwise).
The
good news is that with Abbey being a UK company, the chances
of innovation are better, simply because we can actually
contact them and provide valuable feedback on their products
and our needs as Airsofters. |
Abbey
produce their 134a in stocky 450gm cans. As a direct comparison:
| Brand |
Product |
Capacity/ml |
Mass
bottle (total) /gm |
Mass
contents/gm |
| HFC |
Super
Green Gas |
1000 |
100 |
~300 |
| Abbey |
Predator
134a |
375 |
225 |
375 |
As
you can see Abbey's can is much heavier, and even though it's
the same diameter as HFC's can (at roughly 65mm) there's certainly
more liquid gas in the can.
HFC
Greengas CH2FCF3CH3 (source RefigerantSupply.com
R12 page)
| Molecular
Mass |
Boiling
Point C° |
Boiling
Point F° |
Critical
Temperature C° |
Critical
Temperature F° |
Critical
Pressure MPa |
Critical
Pressure psia |
| 120.91 |
-29.8 |
-21.6 |
112.0 |
233.6 |
4.41 |
600 |
Molecular
weight: 117.066g per mole
Predator
134a (tetrafluoroethane) CH2FCF3 (source RefrigerantSupply.com
R134a page)
| Molecular
Mass |
Boiling
Point C° |
Boiling
Point F° |
Critical
Temperature C° |
Critical
Temperature F° |
Critical
Pressure MPa |
Critical
Pressure psia |
| 102.03 |
-26.1 |
-15.0 |
101.1 |
214.0 |
4.06 |
589
|
Molecular weight: 102.031g per mole
I
won't bore you with lessons in physics and chemistry, but any
two gases at the same temperature have the same number of molecules
(Avogadro's principle). This means that we can work out how
many litres of (expended) gas there is in each can. The assumptions
are that the lubricant in the can weighs nothing (not true,
but we need to start somewhere), and that the useable quantity
of gas is equivalent to the volume of expanded gas once out
of the can.