Seneca/Sam Yang Is the Seneca Dragonfly pumping system

[Duckfish]

A copy of the pump assist Benjamin 392

Designed by Bob Moss?

https://www.pyramydair.com/blog/2007/12/the-pump-assist-benjamin-392-part-4/

 

[Septicdeath]

Pretty much the same

 

[Sawney Bean]

I can't say that I understand the logic behind it. By all accounts, that linkage allows it to pump very easily, but it requires something like 14 pumps to build full pressure. That's a whole lot of work for just one shot, easy pumping or not. Why not just bump the diameter of the pump tube up 1/8" so that you don't need to pump it 14 times?

 

[SilentSquirrel]

I could be showing my ignorance here, but didn’t the dragonfly come out before the 392?

 

[beerthief]

I could be showing my ignorance here, but didn’t the dragonfly come out before the 392?

Sheridan came out with their first rifle in 1947/48

 

[Sawney Bean]

I think the 392 came out in the 80’s and it was just an evolution of the 342, which in turn was just an updated 312. The design has been around for the better part of a century.

 

[Tpatner412]

The pump mech for the Dragonfly Mk2 was designed with Bob Moss actually.

 

[Duckfish]

The pump mech for the Dragonfly Mk2 was designed with Bob Moss actually.

Thanks

 

[Saturnism]

PCP killed the pump star.

12 fpe 1 pump

 

[Tpatner412]

Thanks

Sure thing. If my memory is correct, I know Crosman worked with Bob for a few years, but it never amounted to anything that went to full production for them.

 

[Simplemann]

PCP killed the pump star.

12 fpe 1 pump

Thanks for sharing the video

 

[wsjones]

I can't say that I understand the logic behind it. By all accounts, that linkage allows it to pump very easily, but it requires something like 14 pumps to build full pressure. That's a whole lot of work for just one shot, easy pumping or not. Why not just bump the diameter of the pump tube up 1/8" so that you don't need to pump it 14 times?

Mine builds suffient pressure for accurate shots from 7 yards {6 pumps), 21 yards (8 pumps), and 30-35 yds (10 pumps) with H&N FTT's. I fo not have chrono #'s but other members have posted theirs for similar numbers of pump strokes.

Sitting in a chair on the back poch, gun on a sandbag on the rail, it's pretty quick & easy to pump 6-10 times while seated.

 

[beerthief]

Sure thing. If my memory is correct, I know Crosman worked with Bob for a few years, but it never amounted to anything that went to full production for them.

WOW would love to acquire a prototype probably not available .

 

[Tpatner412]

WOW would love to acquire a prototype probably not available .

I think there are a handful out there. There’s another interesting prototype, the crosman butterfly PCP handpump that was shown at SHOT in 2013-14. Not sure how many of those are out there.