Author Topic: Harmonic and the air rifle  (Read 4468 times)

Offline tjk

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Harmonic and the air rifle
« on: June 18, 2008, 02:44:20 AM »
Can anyone explain how harmonics work with springers. Last night I removed the globe style front sight of my Marksman 0035. Plan on installing a simple muzzle-break on it. Upon shooting it, the accuracy went all to heck. Of course, I don't put much faith in the Tasco scope I mounted on it. Seems I can't quite get the eye relief set and consistant either. Funny part is, the day before, I couldn't miss what I was shooting at?!?!?!?! tjk
397 Benji-98\' model    
Marksman  0035, My Fav!,CDT T\'d
Crosman Sierra-Pro,.177
Benji 392 08\'
CDT TT\'d RWS 34 .22,CP 4-16X40 AO
MM T\'d Marksman 0035
Crosman G1 Extreme
Daisy PowerLine 1000
TF-97 .22
B-28A MM T\'d
B-28 OEM Tuned by me
Beeman .22 RX-2 w/Theoben GR
Beeman .177 R1 Santa Rosa

Offline Big_Bill

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RE: Harmonic and the air rifle
« Reply #1 on: June 18, 2008, 06:25:39 AM »


Hey Tom,



Harmonics are the vibrations that go through the rifle when fired. This causes a whip like action of your rifle barrel. You had your rifle sighted in with the front sights on, and this must have calmed down the vibrations. When you put your new muzzle break on, it may calm it down even more, I hope, or make it worse ? We wont know until you put that muzzle break on !



Bill

Life Member of The United States of America
Life Member of the National Rifle Association
Member Air Guns Addicted Anonymous
SHOOT SAFE ! - SHOOT WELL ! - SHOOT OFTEN !
Always Use A Spring Compressor ! and Buy the GREAT GRT-III & CBR Triggers, cause they are GRRRREAT !

Offline tjk

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Re: Harmonic and the air rifle
« Reply #2 on: June 18, 2008, 06:59:37 AM »
Thanks for your input BigBill. Hopefully when Mr. Gene gets to feeling better, finishes his back-log of orders, we'll gaet around to designning one that will work. But I'm in no big hurry. How's this sound, until the new MB arrives, Let's see what a few wraps of "Duct-Tape"on the end does!!!! LOL's Thanks again, Thomas
397 Benji-98\' model    
Marksman  0035, My Fav!,CDT T\'d
Crosman Sierra-Pro,.177
Benji 392 08\'
CDT TT\'d RWS 34 .22,CP 4-16X40 AO
MM T\'d Marksman 0035
Crosman G1 Extreme
Daisy PowerLine 1000
TF-97 .22
B-28A MM T\'d
B-28 OEM Tuned by me
Beeman .22 RX-2 w/Theoben GR
Beeman .177 R1 Santa Rosa

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Re: Harmonic and the air rifle
« Reply #3 on: June 18, 2008, 02:52:59 PM »
I have also wondered what effect it has on an air rifle barrel? I have been toying with the idea of using one of the barrel harrmonic dampeners used on fire arm barrels and slipping it on an air rifle barrel. It could be positioned anywhere on the barrel. Might be interesting to see what if any effect it has on accuracy?

Offline tjk

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Re: Harmonic and the air rifle
« Reply #4 on: June 18, 2008, 03:12:50 PM »
Not a bad idea Bob. Guess what, the rifle was back on target today!?!?!?! Most have been sun-spots, or alien surveilence yesterday,.....naaa, probably just the operator!!! (ME) LOL's I did take the scientific aproach today. Instead of shooting in a standing position, I shot while sitting on a few sand bags, and applied the knee rest for a "pod". Groups were much better,...even with my naked 0035. By the way, of all the pellets Ive used in it,...besides the crosman Destroyers, it seems to shoot the Beeman Silver Bears the most consistantly. Not only is this my "urban weapon" for pests, but may turn out to be my "bird gun" in the field!!!! If only I could improve the trigger. GRT-III won't work,....Dammit!!!!! tjk
397 Benji-98\' model    
Marksman  0035, My Fav!,CDT T\'d
Crosman Sierra-Pro,.177
Benji 392 08\'
CDT TT\'d RWS 34 .22,CP 4-16X40 AO
MM T\'d Marksman 0035
Crosman G1 Extreme
Daisy PowerLine 1000
TF-97 .22
B-28A MM T\'d
B-28 OEM Tuned by me
Beeman .22 RX-2 w/Theoben GR
Beeman .177 R1 Santa Rosa

Offline Big_Bill

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Re: Harmonic and the air rifle
« Reply #5 on: June 18, 2008, 04:00:53 PM »


Hey Bob,



With the harmonic balancer you will need to move it up and down the barrel, to find the spot, (sweet spot),where you feel the least vibration in the gun.



Let me know how it turns out !



Bill

Life Member of The United States of America
Life Member of the National Rifle Association
Member Air Guns Addicted Anonymous
SHOOT SAFE ! - SHOOT WELL ! - SHOOT OFTEN !
Always Use A Spring Compressor ! and Buy the GREAT GRT-III & CBR Triggers, cause they are GRRRREAT !

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Re: Harmonic and the air rifle
« Reply #6 on: June 20, 2008, 12:57:54 AM »
I think this has been done before, but I'm going to do it just as soon as I have a chance, and let you know.

Offline riarcher

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Re: Harmonic and the air rifle
« Reply #7 on: June 21, 2008, 02:46:20 AM »
Hmmm, interesting thought.
Harmonic Dampeners (Stabilizers) are use throughout the Archery field. Plus they have all sorts of configurations. Some are just weights, others are hydraulic. Some have threads on both ends for reversal, added weights, adjustable dampening, etc. All sorts of mounts are available as long as they're 3/8 fine thread too. Tons of variety, some good, some not so good.
You got me thinking.
You can even get a "Y" yoke. In theory they take the twist out of a bow when released by running 2 balanced to perfection (so they say). may counteract the twisting from a springer? Interesting idea.

I found this specifically for air rifles (not a true dampener though);
http://www.henrich3.com/barrel_weight_for_air_rifle.htm

Gary

I may try something like this by simply wrapping lead wire (solid core solder) around the barrel and slide it to check effects of balancing etc.
If I could move my "sweet spot" out, my hold would be more stable off hand.