Air Travel & Pneumatics?

[onefish]

Alright, I'm sure tis will be a simple question to answer. I have just ordered a new Cressi pneumatic (my first) in the USA to be shipped to my Mum next day freight (also in the USA) who is going to bring it down to me in Oz next week. The gun should arrive at my mums place tomorrow and I was going to get her to let the pressure out before she comes down to Oz.

It occured to me that the gun would have to be freighted by air to get from Georgia to California overnight and I would bet my left testicle it is still presurised. Is there going to be any advantage getting her to let the pressure out before flying again?

Also keeping in mind that the luggage compartment of the plane should be pressurised as the cabin (otherwise peoples pets wouldn't survive down there).

Well while i'm at it, I am planning to get some new 7mm shafts and Mamba kit from Enzo and he's asked if I also want the trigger kit. Do I??????? Does it make much difference?

Cheers,
TJ

[Mongrel454]

Im sry i cant answer your questions, but i have to keep an eye on this thread as i have a cressi gun and i would like to do the mamba upgrade also

[Mongrel454]

Sry if im hijaking but installing the mamba kit does that make it harder to load?

Once again sry for intruding

[onefish]

Mongel, I'm affraid I don't have any answers for you because I haven't got mine yet. It arrives next week and I hope to order the Mamba kit from Maorisub tomorrow.

Anyone know about the air pressure and flying?

One more quick question, has anyone out there got a manometer from Maorisub? I am planning to buy one but the web site states it is to be used with a scuba tank. Can it also be used with the pump supplied with the gun?

Cheers,
TJ

[azapa]

i would recommend to de-pressurize. leave the gun muzzle down for an hour, and use a small pin to depress the ball in, covering your hand with a cloths BECAUSE OIL MIST WILL SPRAY OUT.

Its not a bad idea to leave like 10 pumps (1bar) in the gun to keep everything seated ok.

I have seen two guns damaged by air freighting, but know of many that have had no problems as well.. no hard rule

Before you get the mamba upgrade, try the gun as it is, you will find it very powerful

[foxfish]

I have a pressure gauge (manometer from Maorisub) & yes you can connect it to your pump, I think it is a very important & useful accessory.
When you fit a mamba system you gain more than just power, you get a much quieter, & smother firing cycle, you get much reduced recoil & a very fast spear speed.
Are mambas more difficult to load? Well depends how you look at it, a 6.5 or 7mm spear is quite flexible so you need good technique to pull them down into the barrel compared to a standard 8mm spear.
You have the slider arrangement to insert into the muzzle befor you pull the spear down, that is a little fiddly but not difficult!
Physically they are the same to load but my Asso 115 mamba is NOT easy to load at 26bar but strewth it is powerful VERY VERY POWERFULL!!!

[onefish]

Thanks for the advice Foxfish & Azapa.

Foxfish do you know if there is much to gain from getting the trigger modification from Maorisub?

Cheers,
TJ

[foxfish]

Sorry cant help much with the trigger kit but there must be a reason if they offer such a thing - if you can afford one get it!

[onefish]

Another way to look at it is: does anybody find the feel and tension of the standard Cressi trigger really difficult to use?

Cheers,
TJ

[Mongrel454]

I have a cressi also but i cant really comment on the stiffness at it is my first gun.
To me it feels a little tight, but it works fine for me.

Sry i cant be anymore help than that

[MARMIR]

Hi folks,

1) If you ship by air a can, spray or any other thing that contains pressure the shipper will be asked a certificate of "DANGEROUS GOODS" unless the gun is not
declared as AIR GUN with pressure inside.....anyway the gun comes out of the
company with about 20 bars pressure inside which is well within safety even at
high altitude on a pressurized plane......

as far as the trigger is concerned it reduce a little bit the trigger weight but it's
hard to say how much....the cressi has a trigger with pin of 3 mm that means that if you put 20 bars on the gun (equal to 20 kgs every square cm) the pin will have a
pressure of 20kgs x 0.3 cms = kgs 6....the maori kit halfed the pin dims with a result of 3 kgs, but the major trigger weight comes from the force that the piston exerts
under the pressure before being released...

[onefish]

Thanks for the feedback, Marmir. The gun arrived at my mum's house yesterday and I think it may already be too late. I asked her to set it point down for a while before letting pressure off and it was leaking oil from the barrel. My assumption is that the air freight from Georgia to California has already damaged the piston seal. I got her to let most of the pressure off anyway, leaving a bit just to keep the seals seated as much as possible. I suppose it's not really that big a deal as I was planning to install a Mamba kit anyway. The real bummer is that I won't be able to assess performance before and after the Mamba (you know, so I can feel justified in spending more than the gun's worth modifying it).

Cheers,
TJ

[Spaniard]

Most airlines are ignorant of spearguns in my experience but I was always advised to de-pressurize a pnematic gun before checking it in! Call the airline and ask for advice but don't be surprised if you are met with a wall of ignorance!

[onefish]

I think the reason for having to declare pressurised arosol cans is because the propellent is highly flamable. It's not so much the pressure that is the concern.

[MARMIR]

Originally Posted by onefish

I think the reason for having to declare pressurised arosol cans is because the propellent is highly flamable. It's not so much the pressure that is the concern.

....Sorry to say that I work for an American Airline...(tks Spaniard for our ignorance)
ANYTHING that contains bars at high altitute will increase the pressure
hence the potential danger, no matter if it is gas, air or no flammable
gas....surely if it contains flammable gas that would be a secondary
(or primary) danger.....

Anyway, don't worry! nothing has been damaged, few drops of oil when
the gun is new it's absolutely normal.....