Floating a scheme....there are symmetric linkages that would allow a long stroke

Floating a scheme....there are symmetric linkages that would allow a long stroke

Joined: April 12th, 2002, 5:26 am

March 10th, 2011, 6:46 am #1

with no slots in the pump tube.You could get a pump that would drop in to a Disco, and still leave significant storage volume.

Would you be interested if it meant you pumped the gun like pruning shear, a lever on both sides?

Tough to make good looking...but would that kill your interest?
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lhd
Joined: November 22nd, 2002, 10:41 pm

March 10th, 2011, 7:57 am #2

Yes.


Ask Val how many wanted one.
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Joined: December 25th, 2006, 5:51 pm

March 10th, 2011, 3:07 pm #3

with no slots in the pump tube.You could get a pump that would drop in to a Disco, and still leave significant storage volume.

Would you be interested if it meant you pumped the gun like pruning shear, a lever on both sides?

Tough to make good looking...but would that kill your interest?
I think it's a great idea, and it would allow for much more power.
A simpler way would be a a plunger system, similar to the Philippines FARCO survival gun.
It shoud not be too difficult to fit in a 392 valve, and from there many possibilities.
C'mon Crosman do it!!!
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Joined: September 25th, 2006, 2:19 pm

March 10th, 2011, 3:10 pm #4

with no slots in the pump tube.You could get a pump that would drop in to a Disco, and still leave significant storage volume.

Would you be interested if it meant you pumped the gun like pruning shear, a lever on both sides?

Tough to make good looking...but would that kill your interest?
to developing unwanted sidethrust to the crosshead and piston rod.

Unless a timing devise is located at the fulcrums of each lever. Much in the mannor of the involute spur gear arrangement we see applied too the common scissor jack.


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Joined: December 16th, 2002, 9:31 pm

March 10th, 2011, 4:26 pm #5

the wine bottle corker I have has that sort of linkage and uneven pressure on the handles causes it to cant to one side.

regards,

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Joined: November 28th, 2002, 6:26 pm

March 10th, 2011, 5:20 pm #6

with no slots in the pump tube.You could get a pump that would drop in to a Disco, and still leave significant storage volume.

Would you be interested if it meant you pumped the gun like pruning shear, a lever on both sides?

Tough to make good looking...but would that kill your interest?
Your concept sounds very cool - including the general advantage of side-pumpers that scope mounting flexibility isn't compromised.

But it's nevertheless true that many folks won't touch any airgun that doesn't look like a firearm - at least in bad light. No accounting for taste.

Steve
Last edited by pneuguy on March 10th, 2011, 5:23 pm, edited 1 time in total.
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Joined: August 16th, 2004, 7:32 am

March 10th, 2011, 6:48 pm #7

with no slots in the pump tube.You could get a pump that would drop in to a Disco, and still leave significant storage volume.

Would you be interested if it meant you pumped the gun like pruning shear, a lever on both sides?

Tough to make good looking...but would that kill your interest?
When charging these guns now it is similar to hedge clippers but with this design you'll have a rifle flopping aroung in between, right?

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Joined: June 25th, 2002, 1:34 pm

March 11th, 2011, 12:34 am #8

with no slots in the pump tube.You could get a pump that would drop in to a Disco, and still leave significant storage volume.

Would you be interested if it meant you pumped the gun like pruning shear, a lever on both sides?

Tough to make good looking...but would that kill your interest?
smaller than a 392, and a long side lever could be used? I pumped a similar setup to 2200 psi. with no problem with a mac-1 ext. billet lever.
Last edited by jpsaxnc on March 11th, 2011, 12:36 am, edited 1 time in total.
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Joined: April 12th, 2002, 5:26 am

March 11th, 2011, 12:48 am #9

The idea is to get a lot of stroke on a smallish diameter piston, say 760 size, but with leverage advantage, unlike the normal inline pump,and without the muzzle in the dirt (or toward your face) issues of inline pumps. I'd like to avoid a slot, both drop in fitment to many co2 rifles without modification to the gun, and to maximize the useful stroke.

Binding might be an issue, but less than with the grasshopper single side link of the old benjie pistols. A third link could be a way to manage timing,at the cost of bulk and complexity.

I'm imagining you'd charge this gun with the butt on the ground, probably kneeling, and get several shots per charge.
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lhd
Joined: November 22nd, 2002, 10:41 pm

March 11th, 2011, 3:26 am #10

Because it wasn't really "scope friendly". The thing COULD have been redone to improve things, but wasnt.

But also, there hasn't been any so-called "improved linkage guns that show an honest superiority over the very simple linkage of many current designs. A problem with two handed cocking is you need to brace the gun against your thigh or a table or whatever. Hard to see any true benefit.

Multistage pumps seem to have the edge over any multi-link levers so far.
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