What is the stock hammer supposed to be made of.
I v’e got my velocity straightened out now 9 fps deviation on 30 shot string. I can shoot 50 shots starting at 830 and ending on 825 with the peak at 865 with Kodiaks E.H.’s . top hat is at .070 and power wheel is on 10. If I drop the PW to 9 I loose about 30 fps. If I increase it to 12 I get no more velocity nor does the report of the gun get louder. This is a 24″ barrel 22 cal. I took the gun down to clean and check a couple of other things and found out my hammer is plastic (about 15 gr. and no weight)….. is this correct….. I’m thinking I should be able to obtain this power and consistancy without having the spring preloaded so much… Am I right or wrong ? Should I get a hammer from Anthony ? this is still stock talon…
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O.K. the results are in took 10 shot to get up to speed.. Second 10 are beeman siler arrow 17 gr 934,940,938,932,936,935,940,941,938,935, . The next 5 are Crow Mag’s 920,917,915,921,918,… The next 5 are Kodiak E.h.’s 898,890,888,885,887…. Eun Jin 28’s for the last 5 803,805,805,808,802 …. No setting had been change from prior other than weighht of hammer. I used the remaining shots playing with the PW. Dropping 10 to 9 yielded a 20 fps drop in velocity. 10 to 11 no change in velocity , 11 to 12 gun got louder no change in velocity… So I have an average velocity of 936 for S.A. 918 for crow mags, 804 for Eunjin 28’s. Extreme shot spread over course of 30 shots av 8 fps…. velocity started falling off around shot 45 of course I was playing with the pw so that is’nt a good observation. Now I’ve been told many times ” knowing when to quit is a key to success” so I’m quiting here… Everthing is right where I wanted it….. So now it’s time to put some decent 6-24 glass on this baby and one of Anthony’s frame extensions….Oh yeh and talk my wife into some of Steve’s killer wood and a new sniper is born….. Darn never new the dark side could be so addictive…. thanks guys…..
O.K. her is what I came up with…. I turned the O.D. down between the guides to allow enough lead tape to be added .. So now the hammer weight is 30 grams instead of 15….. heres’s a pic.. over look the messy shop…. fixin to put it back in the gun and go shoot…
j3magnum,
Certainly yep on the tape. Have used it and suggested it in the past. Works ok with the stock talon striker because there is plenty of relief on the OD between the delrin guides. The delrin striker I have doesn’t have much relief on the OD between the ends. It is as you elude to not much to work with. Having said that my measure is ~0.025″ of relief so that sure ought to be good for a wrap of tape.
You seem to be right on re your points 😉
If you measure the weight difference and give the whole thing another whirl,,, I’m sure we will all be quite interested in what you learn 😉
Best of luck
m
Very intersting…… I think I’m going to the golf shop today. Gonna pick up some lead tape. Its very thin,, and apply it to the outside of the hammer barrel ( keeping in mind my clearance ) and leave all my settings as they are… Then I can tell what it does…. I have worked on crosamns for years, making spring adjusters and what not…. Every gun has it’s differences from others…. Somewhere there is a perfect ballance between hammer weight and spring load. To heavy a hammer and you get alot of valve flutter and a slower lock time. To light usually takes alot of spring pre-load and won’t make max velocity… I’ll play around with it some and let ya’ll know what I come up with. I’m thinking just a little more weight might do it….
You have got a very good setup. I have been playing with the talon valve and hammer weights. I have been thinking of going with lighter hammers. I have modded a few talon valves, i get 90/100fps increase but still can’t get a decent curve all power right from the get go. If you ever take your valve apart i’d like to see if that is a stock spring in there or not. That would answer a question or two for me. If you go heavier on the hammer you would see more velocity but fewer shots and a opened spread. I’d stick with what you got or do a little work on the valve.
All delrin hammer?!?
I like that idea. After all testing I’ve made I am not so happy with heavier (75g) brass+delrin+leather combination. Making it from single piece delrin is 15 minute job. Gotta try it out.
I became thinking this heavy and heavier hammer theory. Since E=1/2mv2 you can see that twice heavier hammer will only double the impact energy to tophat while twice faster hammer will quadruble it. (That is if one is using same spring).
Then comes other factors. With heavier hammer the tophat and valvestem moves slower. Meaning that valve is open longer time. Meaning that pellet is almost out of barrel when last air is flowing from valve. Then the valve-spring and pressure needs to quickly close the valvestem. Heavier hammer adds inertia and closing is more difficult or at least slower.
Putting all that together and it seems like valvestem open-close cycle needs to be as fast as possible. To get enaugh airflow from fast paced cycle means the valvestem bore needs to be as big as possible. One can’t increase power using longer opening time anywhere nearly as effectively as using bigger bore and fast cycle.
Well, thats old news for valvemakers but I think I just figured the physics behind that one. Think I will try the light & fast hammer and see what it does. Need to make new valve too for bigger bore.
j3magnum,
I have one of those delrin strikers/hammers and yes it takes much more spring pressure to get power. I normally don’t use that light hammer but found it worked ok for the talon on the lower end in particular.
What Tony notes is of course correct the stock talon striker these days is around ~50 grams where as the delrin striker is around 15 grams. Given you have a great power curve and are nearly in a sweet spot for pellet speed and you get ~50 shots,, that’s not bad at all ❗ ❗
Dono if I would change much or anything. Hard to beat good consistent shots. One can always play with pellet selection as well
If you are really curious you can get a piece of 1″ OD aluminum tube 1/8″ wall and ~2″ long. Take down the OD a bit under 1″ so it slides inside the frame freely say 0.950″. That will give you ~30 to 35 grams of weight. Given your current set up that ought to be enough to try out.
Taper the aluminum tube ends on the OD just a bit.
There are of course other approaches/materials to make a hammer.
BTW you could probably buy a complete talon striker from AF cheap. But again as mentioned your achievement of consistency is darn good as it stands!! Nice work.
Just some thoughts and hope it is of some help.
m
yes it is black delrin and very light…. It took alot of tophat adjusting to get it where I am now. could i get anymore out of the gun with one of your hammer’s . My groups got alot better at 865 versus 800 fps… just wondering if i push it a lttle further what will happen..
Yo J,
You either have an older rifle or someone replaced the hammer with the very early, all delrin hammer.
The Talon/SS hammers are now just pipe steel with delrin guides that weigh in about 45 grams.
My hammers weigh in at 65-70 grams but a 9 fps spread over thirty shots is very good. If you are happy with the performance, shoot em up.
Tony
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Hey that looks great ❗ Nice work 😉