Bag fire FXC/ Reset?

[cvfd1399 0]

I have a old FXC I want to fire off in a plastic bag. What do you set the needle at, how hard do you have to hit the bag. Also how much force is required to reset it with a screwdriver?

[markbaur 0]

Set the needle anywhere you can see it. Red zone, 1000, 2000, it doesn't matter.

You don't have to hit the bag at all. A plastic sandwich bag held firmly closed around the hose is enough; a squeeze of the bag is all it takes. The pressure inside the bag before you squeeze is ground pressure. When you squeeze, the sensor thinks you are going fast, below ground level. So you are testing if the unit would fire at impact.

What were you going to reset with the screwdriver? Adjusting firing altitude is easy even without a screwdriver. You don't need a screwdriver to recock the pin puller: use a suspension line stirrup and pulling up on the big black box (the one that goes in the reserve container, not the little one with the altitude window).

FXC says you can damage the unit if you fire it without a load. If you care, use a vise grip to hold a couple pieces of rubber bumper tightly to the cable.

Mark

[cvfd1399 0]

I will make a dummy load for it. I just reset the cable. It only took a firm pull to make it reset. Thanks.

[riggerrob 643]

Rubber bands wrapped around the power cable work well to simulate a dummy load. The primary goal is to prevent the cable end from slamming into the housing end hard enough to damage the Teflon.
Firing FXC 12000s on the ground is an amusing exercise, but does not produce accurate data about how high it fired or at what rate of descent.
In other words, the plastic bag test is not legal for reserve repacks.
Be careful not to dry-fire it too often or you will wear out the catch springs, etc.