8 replies to this topic

[mystefansdontflystraight]

Hello all. I modified my ball shooting pump shotty, from ERTL, pretty basically. I added a recon spring, coupler'd it like sputnik's Karen, reinforced it as seen in FA_24's Gift to Rambo. For some reason, it is getting about 50ft flat, which I know isn't normal, having gone up against these things at HbH. The only thing I haven't done that MAY be killing the range is gluing the piece of 19/32 in the front of the plunger tube and filling the dead space with hot glue. I can't see that adding another 40ft on though.
Any thoughts to what I may have done wrong? I also added a pad at the end, using the stock ammo, as seen in Karen. The plunger tube is airtight, as I put some etape under the o rings. I CANNOT cock the thing when a dart is loaded, it just won't happen. Seal isn't an issue.
Any help to figuring out my crappy ranges would be greatly appreciated.

Edited by mystefansdontflystraight, 01 November 2008 - 11:39 AM.

[Split]

Hello all. I modified my ball shooting pump shotty, from ERTL, pretty basically. I added a recon spring, coupler'd it like sputnik's Karen, reinforced it as seen in FA_24's Gift to Rambo. For some reason, it is getting about 50ft flat, which I know isn't normal, having gone up against these things at HbH. The only thing I haven't done that MAY be killing the range is gluing the piece of 19/32 in the front of the plunger tube and filling the dead space with hot glue. I can't see that adding another 40ft on though.
Any thoughts to what I may have done wrong? I also added a pad at the end, using the stock ammo, as seen in Karen. The plunger tube is airtight, as I put some etape under the o rings. I CANNOT cock the thing when a dart is loaded, it just won't happen. Seal isn't an issue.
Any help to figuring out my crappy ranges would be greatly appreciated.

It's probably because the recon spring sucks balls. Try something beefier.

[angelof DEATH182]

Too much seal is just as bad as not enough, maybe the Etape is a bit too much and the friction on the plunger tube is slowing it down, or maybe the barrel is too tight?

[mystefansdontflystraight]

Splitlip: I know the recon spring sucks balls. It was the only spring of the length I needed that I had on hand.

Angel of Death: My darts fit OMC petg very well, I am using 12 inches of that. I added the etape after I test fired it, the ranges have not changed significantly.

[mystefansdontflystraight]

I'm with AOD on this one. The stock O-ring seal is great! At least on mine. No need to add anything. Try taking the tape out and see what difference it makes. You can always put some back.


Plus, if you are never going to want to vacuum-load, you can notch the plunger, just like the ends of most air pumps, to make it only seal going forward. Whoops, nevermind - I forgot the double o-ring changes the geometry and makes that risky. It might work, but since I've never tried it myself I'm not going to recommend it.

Ill try taking it it off. Seriously, this thing doesn't need to be coupler'd. I vaccum load all the way, it increases the ROF by so much.

[mystefansdontflystraight]

I will do something like that, Bob. I found a VERY beefy spring at my local hardware store. I think it is too strong, but I will try it on it's own, then add the recon, and then the pump shotty if that is nesessary.
Thansk for the help everyone.

[Draconis]

You might want to try what I use for dart-block material then: flat wire, as dropped by the street-cleaning truck.

Another handy source of spring stainless is windshield wiper blades. There are two thin strips on each blade. This is the time of year when everyone should be installing new blades or inserts anyway... I use this stuff for all sorts of projects. I made a pair of tweezers last week.

[nerfboi]

You might want to try what I use for dart-block material then: flat wire, as dropped by the street-cleaning truck.

Another handy source of spring stainless is windshield wiper blades. There are two thin strips on each blade. This is the time of year when everyone should be installing new blades or inserts anyway... I use this stuff for all sorts of projects. I made a pair of tweezers last week.

You can also use them to make lock picks. But not to give out any ideas. On topic: were you just using the recon spring? If so, that's probably why. use the stock and the recon spring. See if that works.

Edited by nerfboi, 02 November 2008 - 01:59 PM.

[mystefansdontflystraight]

You might want to try what I use for dart-block material then: flat wire, as dropped by the street-cleaning truck.

Another handy source of spring stainless is windshield wiper blades. There are two thin strips on each blade. This is the time of year when everyone should be installing new blades or inserts anyway... I use this stuff for all sorts of projects. I made a pair of tweezers last week.

You can also use them to make lock picks. But not to give out any ideas. On topic: were you just using the recon spring? If so, that's probably why. use the stock and the recon spring. See if that works.

I am using both the recon/stock spring. I have not had time to mess around with it anymore. Hopefully I can next weekend, as I was modding my SS2 and didn't have time today.