Ed, i totally respect you have had no issues, seriously you are running 800psi lower pressure than a 22mm kit...it detonates, trust me i tested it Can we move on from it now?
This question is for Nightcrusher. I ordered the DYI kit today and the proper spring from PA. In your write up you said not to use the spring at full length and you may have to cut off a coil or two. In your case you needed to cut off one coil. How did you know? Is there an overall spring length I should be looking for? Maybe there are instructions with the kit from Tony and I am getting ahead of myself. You did a great write up as always with great pictures (so glad you got into air guns!). This was the one question I had when I read it. Thought maybe you or Tony could expand on this a little more.
Now that is interesting, you could also machine a system close to a FWB300 sled? Look forward to seeing it in action, or should I say, goal no action? Only real question comes to mind now seriously, on the ball bearings, do you intend to lube with Krytox, moly, or STP break in oil, we don't want to see it smoking.........lolJason G
Steve, a great project and beautiful rifle. The kit looks very nice as well, a dream for sure. In my prior post I was contemplating an alternate spring for generating power in the 10-11 Ft lb range, (I stated 10+) not for pushing the kit beyond 12 Ft lb. Nor the pursuit for more power and speed. (I enjoy my rifles all below 11.25). As there are many springs available now, with some being on hand and others ordered custom and complete from a vendor, and not require any cutting from the start. Sorry for any confusion, Just my curious mind at work. I like the idea of the STP oil, a bottle would last a lifetime.Best regards,Vs
As for general plinking and pest control, most people would be surprised by the penetration ability of a 10 Ft lb rifle.Vs
Yes I have. I had initially presumed that the 12 Ft lb spring was just a shorter version of the standard FAC spring wire. This prompted my curiosity about using a finer spring wire, not knowing that it already used one, and since vendors sell springs of many sizes and some can be custom ordered for coil count. Not that there is anything wrong with the spring suggested for use in the kit, just a discussion point. As for general plinking and pest control, most people would be surprised by the penetration ability of a 10 Ft lb rifle.Vs
Quote from: VillageSniper on December 28, 2018, 10:59:49 AM Yes I have. I had initially presumed that the 12 Ft lb spring was just a shorter version of the standard FAC spring wire. This prompted my curiosity about using a finer spring wire, not knowing that it already used one, and since vendors sell springs of many sizes and some can be custom ordered for coil count. Not that there is anything wrong with the spring suggested for use in the kit, just a discussion point. As for general plinking and pest control, most people would be surprised by the penetration ability of a 10 Ft lb rifle.VsThe FAC spring is more like the old Mk2 spring, the sub12 TX355 spring is thinner wire, wider wound to be much softer. The reason i went with this spring is its ID mainly, it allows for a 14.9mm OD guide and i have the ID reamed to 10mm. So you get max wall thickness to ensure max strength. I have used the small springs from Vortek for 20mm builds etc as they are sub20mm diameter, however i had to move to steel guides and with the smaller ID even the thinner wire springs have high spring rates. Springs get complicated its not all just in the wire thickness.Top give you an idea how soft the TX355 spring is when its shortened and dressed up 1.5 coils shorter, i dropped one into a stock TX set up for the UK and the gun delivered in the 7fpe range, it had a hard time moving that 250g piston.Also another reason for the TX355 spring is for .177 it allows a decent amount of preload by default even when shortened, in .22 it can get a bit slim at 11fpe, i was seeing just over 8mm preload on 1 build delivering 11.3fpe, the spring was 2.5 coils shorter and i bet would deliver under 6fpe in a stock .177 set up. Just shows you how efficient 22mm can be.
I apologize if thread hacking...So which caliber is preferred with this conversion kit- .177 or .22? For me, I'll be using the rifle (not carbine) for both plinking and pesting- mostly HOSP, maybe Rabbits and of course, the dreaded English Starling... I WILL be acquiring a 12 fpe spring...
The recoil sled is complete. Initial testing shows that this sled is sensitive enough to show both stages of recoil. I can run this sled fully floating, or with a light return spring. Trigger is set off remotely with an air bladder Look for test results and video clips this coming weekend.Steve
Do your kitchen drawers slide as easily? What drawer slides are you using?Happy NY!-Y