Crosman 2240 conversion to air: Part 4

by Tom Gaylord, The Godfather of Airguns™
Writing as B.B. Pelletier

Crosman 2240 conversion to air: Part 3
Crosman 2240 conversion to air: Part 2
Crosman 2240 conversion to air: Part 1
R.A.I. Adjustable AR Adapter for Crosman 2240 pistols: Part 2
R.A.I. Adjustable AR Adapter for Crosman 2240 pistols: Part 1

WARNING: This conversion changes the operation of the pistol to use air at up to three times the pressure it was designed for. The parts that are installed are strong, but there are other parts in the gun that aren’t changed and could fail when subjected to the higher pressures. Pyramyd Air advises anyone making such a conversion to exercise extreme caution.

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Crosman 2240 conversion to air: Part 3

by Tom Gaylord, a.k.a. B.B. Pelletier

Crosman 2240 conversion to air: Part 1
Crosman 2240 conversion to air: Part 2
R.A.I. Adjustable AR Adapter for Crosman 2240 pistols: Part 1
R.A.I. Adjustable AR Adapter for Crosman 2240 pistols: Part 2

WARNING: This conversion changes the operation of the pistol to use air at up to three times the pressure it was designed for. The parts that are installed are strong, but there are other parts in the gun that aren’t changed and could fail when subjected to the higher pressures. Pyramyd Air advises anyone making such a conversion to exercise extreme caution.

Crosman 2240 air conversion long barrel
The steel breech and longer barrel increase the 2240′s length dramatically.

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Crosman 2240 conversion to air: Part 2

by Tom Gaylord, a.k.a. B.B. Pelletier

Crosman 2240 conversion to air: Part 1
R.A.I. Adjustable Adapter: Part 1
R.A.I. Adjustable Adapter: Part 2

WARNING: This conversion changes the operation of the pistol to use air at up to three times the pressure it was designed for. The parts that are installed are strong, but there are other parts in the gun that aren’t changed and could fail when subjected to the higher pressures. Pyramyd Air advises anyone making such a conversion to exercise extreme caution.

Crosman 2240 air conversion
My Crosman 2240 has been converted to operate on high-pressure air.

This report covers:

• Where we are
• Before filling the first time
• Shooting the gun
• Crosman Premier pellets
• RWS Hobby pellets
• RWS Superdome pellets
• What comes next

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Compressed-air tank capacity

by B.B. Pelletier

Today is Friday, when I usually have some fun, but I already did that with the dime article on Tuesday. I’m going to remain serious and address a topic that causes a lot of confusion. I’m going to talk about compressed-air tank capacity and how it relates to airguns.

As this report unfolds, I think you’ll see why this subject is so confusing. Every time I instruct a new precharged pneumatic (PCP) airgun owner about compressed-air tanks, their eyes glaze over when we come to this part.

“How can this scuba tank hold 80 cubic-feet of air? It isn’t that big!” That’s not what 80-cubic feet means.

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Hydrostatic testing of pressure vessels, including scuba tanks

by B.B. Pelletier

This posting was requested by a reader several months ago, and I think it’s timely now with Christmas approaching. People buying PCP guns for the first time are going to make the choice of whether to use a scuba tank or a hand pump to fill their guns, so the maintenance of scuba tanks should be of interest to many. In fact this information applies to all pressure vessels that have to be tested.

Controlled by DOT
Every country has a national agency that controls the use, transportation and maintenance of pressure vessels. Though the laws differ somewhat, they are all pretty similar because the concerns are always the same. In the United States, the Department of Transportation controls pressure vessels. They establish the regulations for their use, one of which is periodic pressure testing to determine if the vessel is still safe to fill. That test is done with water instead of air and is called a hydrostatic test. Water is much safer because it doesn’t compress; so, if there is a rupture, it doesn’t explode like pressurized air does.

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