Back to the point though. The design of the tuner looks okay but lots of air rifle shooters like to fit some type of muzzle brake to reduce the surge effect on the shot. The design, as it stands, might make that impossible.
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the Daily hi thread
Barrel harmonic tuner
- Thread starter Anchutz
- Start date
LumisArms
Super member
Even cheaper couple packs of cooking bacon 97p each
Cooking on gas nahh lop a tree down from local park n use it for firewood free then
LumisArms
Super member
It would make more sense to me if it slipped onto the barrel behind where the threads are
This is getting messy. I'm imagining a pile of roadkill arranged to form a perfect vibration-damping benchrest.Even cheaper couple packs of cooking bacon 97p each
Cooking on gas nahh lop a tree down from local park n use it for firewood free then
LumisArms
Super member
It would be cheaper
1260engineer
Member Extraordinaire
You do know pellets have nothing to do with barrel harmonics. barrel harmonic waves are generated by the rifles action . which show up mainly on rifles with floating barrels . its a wave that travels down the length of the barrel producing a twitch at the end ( commonly known as muzzel flip ) most common way of solving the problem is to add a movable weight to the barrel and finding the point where it counter acts the wave . which in most cases just add a bit of droop to the barrels due to the barrel diameter.
The best way of all.. Is sorting out the rifles action . triggering . hammer and spring and exhaust valve and spring . making it all nice and smooth .
on the old forum I did a thread on this . where i generated muzzel flip and the made it go away by tuning . Somewhere i still have the video. i will see if i can find it and put it up.
The best way of all.. Is sorting out the rifles action . triggering . hammer and spring and exhaust valve and spring . making it all nice and smooth .
on the old forum I did a thread on this . where i generated muzzel flip and the made it go away by tuning . Somewhere i still have the video. i will see if i can find it and put it up.
1260engineer
Member Extraordinaire
By stacking them higherMost people with high end rifles claim tio be stacking "pellet on pellet" already though
How can one improve on stacking 4.5 or 5.5 mm projectiles ?
I 3D printed one in lockdown, I did post this on the old forum.
This is what it looked like, it was just a nut to act as a weight on a thread.
Here are some groups:
0 turns:
This was the worst setting:
This was the best setting, 3 x 5 shot groups all shot in a row:
The idiot shot was me leaning on the table too much, ignore this.
I'm a total believer in this, this was the same gun with the same pellets shot on the same day. The only thing changing was the position of the nut.
A well made posh version of this would go down very well I think. FX have launched a tuner which works on the same premise as this one, but it would look crap on most guns.
This is what it looked like, it was just a nut to act as a weight on a thread.
Here are some groups:
0 turns:
This was the worst setting:
This was the best setting, 3 x 5 shot groups all shot in a row:
The idiot shot was me leaning on the table too much, ignore this.
I'm a total believer in this, this was the same gun with the same pellets shot on the same day. The only thing changing was the position of the nut.
A well made posh version of this would go down very well I think. FX have launched a tuner which works on the same premise as this one, but it would look crap on most guns.
How much of the harmonic effect did you tune out?
There's always going to be some movement, equal and opposite reactions and all that.
1260engineer
Member Extraordinaire
Next to all of it . i get a couple of thou on the end of a 615mm barrel . power wise a be difference is made running down at 11.2 fpe .
I also run a light weight titanium hammer which takes less spring to accelerate which means less rearward drive = less recoil from hammer drive .
and run a larger diameter exhaust valve which means its movement is less .
I'm lining you up as test pilot Ste.
See you tomorrow at the range.
Aston_Shooter
Member Extraordinaire
It can't hurt to try it, as it's something where the results can be quantified. If nothing else it will answer a question.
I know nothing about harmonics, but it's certainly an interesting concept.
I know nothing about harmonics, but it's certainly an interesting concept.
1260engineer
Member Extraordinaire
Have you got a picture from the side ste
It's the same pretty much except for a flat bottom to keep it free floating. Here's the model below.
Side:
Top:
3D printing isn't a good solution for this, I broke a couple of these in my bag pulling the rifle in and out.
Cinimod
Member Extraordinaire
I'm a believer in the harmonics bit and it is a simple principle. I also do remember reading an article in the airgun mags where the writer had an adjustable coned air stripper fitted after setting up the gun with the best grouping pellet. The group size did change dramatically when the cone was moved in and out to find the sweet spot...........dom
1260engineer
Member Extraordinaire
On the rifle Ste .sorry mate
FPoole
Member Extraordinaire
You will look very long and hard for the perfect pellet. I've gone through at least 250,000 of my guns favorite pellets and maybe 5 sleeves have been what I'd call great. There have been 2 sleeves that were absolutely trash, in my gun. Sold them to a friend and they were great in his Pro Target. Vortek sold an item like this many years ago, but I can't remember why they stopped making it.
1260engineer
Member Extraordinaire
Here is the video . in the first part i just try to explain whats going on . to create the flip ive turned the rifle up to 11.9fpe . firing a 8.44 Jsb . this is the best screen shot i can get from the video showing how far the clock goes on the first shot . see nearly point 2 of a mill .
Dont look or sound a lot but now triangulate that out to 25 ..30 or 40 yds .
Ive tagged a little clip on the end of the video of another shot which you will see is very different. after a bit of tuning.
The video .
Dont look or sound a lot but now triangulate that out to 25 ..30 or 40 yds .
Ive tagged a little clip on the end of the video of another shot which you will see is very different. after a bit of tuning.
The video .
