Motorhead,You may not see any benefits to this design when using your light weight hammer. One of the benefits that Bob is mentioning is a smoother/lighter (feeling) cocking.It already appears as if your running a stock 6 to 8 lb spring on the loaded guide. Going higher kind of defects the idea.It also appears (if your running a 6 to 8 lb spring already) you system depends on the extra dwell caused by the preload to achieve that 865fps. If perhaps that is the case, then you have 2 ways to show how your light weight hammer (in it's current configuration) or loaded spring guide (with standard weight marauder hammer) improves shot count.I bet if you put a stock hammer in there (replace HT with set screw) and the the loaded spring or short stiff spring with negative preload you will see similar to if not the same results as just running the light hammer with your standard spring. It also may show that when running a loaded spring guide or short stiff spring with negative preload that the in-elastic collision from hammer to valve stem is becoming more elastic, reducing the dwell at the same lift and the hammer is not following the valve stem as much during the initial strike.Trying it out with the stock hammer can't hurt and I am sure you have the parts to just drop in and test
Scott, how big of a gap are you leaving? I found out that increasing the gap actually increased the velocity. http://www.gatewaytoairguns.org/GTA/index.php?topic=100123.msg939510#msg939510 You may want to give it a try.
Lloyd, I think you can simplify by moving the stop "blue" to the rear of the spring instead. That way you dont need to sleave the cocking rod.
Bob, if you like SSG, I am with it too. One thing which I guess I will find out, is how much of a thump is there when the SSG hits its travel limit when the gun is fired? Do you or Scott think it is enough to cause accuracy issues? I would think that choosing a proper bumper material to arrest the spring could be helpful. Maybe some of the ISOLOSS material?Scott, I like the way you incorporated the plastic alignment and anti-friction guides in your build. Those details really make a difference in consistency.Lloyd
Thank you Bob .... Lazy New Years day so why not fiddle some Test platform the .22 Marauder w/Reg & Bottle. Before doing this was at 865 fps with 18.1 jsb.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~First pictures the parts made up after thinking of a simple way to set up, be 100% reversible without being getto with the actual modification. Used a 8-32 threaded blind nut and long SS 8-32 screw. Machined up a Delrin AF collar to be the seat for spring & center it within hammer bore. Then a 3/8-24 threaded guide that screws into back of velocity adjuster cap.* the long screw into the blind nut adjusts over all length between the two, keeps the assembly minimally invasive when cocked and just looks clean
Quote from: Motorhead on January 01, 2016, 07:10:14 PMThank you Bob .... Lazy New Years day so why not fiddle some Test platform the .22 Marauder w/Reg & Bottle. Before doing this was at 865 fps with 18.1 jsb.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~First pictures the parts made up after thinking of a simple way to set up, be 100% reversible without being getto with the actual modification.Used a 8-32 threaded blind nut and long SS 8-32 screw. Machined up a Delrin AF collar to be the seat for spring & center it within hammer bore. Then a 3/8-24 threaded guide that screws into back of velocity adjuster cap.* the long screw into the blind nut adjusts over all length between the two, keeps the assembly minimally invasive when cocked and just looks clean Scott -Where did you get these parts? Can you list them in a bit more detail?Thanks.
Thank you Bob .... Lazy New Years day so why not fiddle some Test platform the .22 Marauder w/Reg & Bottle. Before doing this was at 865 fps with 18.1 jsb.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~First pictures the parts made up after thinking of a simple way to set up, be 100% reversible without being getto with the actual modification.Used a 8-32 threaded blind nut and long SS 8-32 screw. Machined up a Delrin AF collar to be the seat for spring & center it within hammer bore. Then a 3/8-24 threaded guide that screws into back of velocity adjuster cap.* the long screw into the blind nut adjusts over all length between the two, keeps the assembly minimally invasive when cocked and just looks clean