Jump to content

Close
--Click to Remove Ads--
Photo
- - - - -

Mechanical Release


  • Please log in to reply
7 replies to this topic

#1 snath

snath
  • Registered
  • 11 posts
  • LocationAtlanta GA

Posted 16 June 2013 - 07:03 PM


I picked up a Trufire bow release and modified it to grip a 3/8 inch pouched ball.

I removed and discarded the wrist strap and replaced it with a loop of paracord (that I hook around my ring finger), machined off some bits, and made a couple of stainless loops, beveled the inside edges, and silver soldered them on.

I mounted it and a slingshot on a piece of plywood and after I dialed it in (I found that it likes a thin pouch, and ball placement in the pouch is pretty critical) the balls started going in pretty much the same place.

I may make another one with bars (like the Dankung release) instead of loops.

 

Here are a few picutures.

 

A few shots of the modifications:

Top.jpg Side.jpg Gripping Pouch.jpg Side Open.jpg

 

10 Meters to the target over my plywood "shooting fixture". The red line is not a laser; rather, it is braided red rubber bands at 32 inch draw.

10 Meters.jpg

 

The target after about 50 shots from the shooting fixture.

Target.jpg

 

A close up of one of my exhaust pipe slingshots (I posted about them on the Homemade Slingshots Forum a few days ago)

Exhaust Pipe Slingshot.jpg



#2 Charles

Charles

    4000+ Post Club

  • Moderators Moderators
  • 8,090 posts
  • LocationBritish Columbia

Posted 16 June 2013 - 08:42 PM

Nice job on the conversion. You may know that Dankung makes a mechanical release specifically for slingshots. 

 

http://slingshotforu...anical +release

 

I made a mechanical release from scratch several years ago.

 

http://slingshotforu...anical-release/

 

About 18 months ago Bill Hays suggested using a "pony clip" or spring clip for a mechanical release. His photos of it seem to have disappeared, so here are a couple based on his idea.

 

ReleaseAndSlingshot.jpg

 

ReleaseCloseUp.jpg

 

ReleaseInHand.jpg

 

I did not find that the use of a mechanical release improved my accuracy, and I believe Tex said the same thing. Certainly with a bench mounted rig, it is a different story. But it did not help me when using one by hand. I will be interested to get your reaction after you have used it for a while.

 

Cheers ..... Charles

 

 

 



#3 NaturalFork

NaturalFork

    Shooting a slingshot is the greatest form of meditation.

  • Bronze Sponsor Bronze Sponsor
  • 5,626 posts
  • LocationNew Hampshire

Posted 16 June 2013 - 10:05 PM

Wow that is a brilliant idea!!! 



#4 snath

snath
  • Registered
  • 11 posts
  • LocationAtlanta GA

Posted 17 June 2013 - 04:44 AM

Nice job on the conversion. You may know that Dankung makes a mechanical release specifically for slingshots.

 

Thanks for the review and views of the internals of the Dankung release. As I noted above, I am considering making a Dankung cross bar-like modification to a Trufire release. Cross bars instead of loops may make ball placement in the pouch a little critical to accuracy.

 

I made a mechanical release from scratch several years ago.

 

http://slingshotforum.com/topic/8867-mechanical-release/

 

Thats one heck of a job. Did the pivot-from-the-side fingers tend to make the ball veer off course? I looked at some hook releases and decided against them because I thought they might do that. I like the sear on yours because it could be adjusted to eliminate/reduce creep. The long trigger pull is one thing I really don't like about the Trufire.

 

About 18 months ago Bill Hays suggested using a "pony clip" or spring clip for a mechanical release. His photos of it seem to have disappeared, so here are a couple based on his idea.

 

I thought about some kind of a spring clip but decided that it would be a little bulky.

 

I did not find that the use of a mechanical release improved my accuracy, and I believe Tex said the same thing. Certainly with a bench mounted rig, it is a different story. But it did not help me when using one by hand. I will be interested to get your reaction after you have used it for a while.

 

So far, I'm not finding the release doing much to improve accuracy when using it by hand, In fact, it has made it worse. I put it on the stationary fixture to see what's going on and to determine what, if any, adjustments might improve it.

 

I'm gonna stick with it a while longer if for no other reason than to give my thumb a rest (I'm 67 and have some problems with tendonitis), But in my opinion, there's no substitute for a "human release".

 

 



#5 Charles

Charles

    4000+ Post Club

  • Moderators Moderators
  • 8,090 posts
  • LocationBritish Columbia

Posted 17 June 2013 - 10:12 AM

I used my release in the upright position, so there was no sideways motion to the ammo at all. I took the basic idea from ancient crossbow release mechanisms.

 

Joerg Spraave of the Slingshot Channel (Youtube) frequently employs mechanical releases on his contraptions. You might find it fun to have a look at some of his designs if you have not seen them before.

 

I well understand the problems with aging joints, and mechanical releases can certainly supply some relief in that regard. Just keep shooting ...

 

Cheers ....... Charles



#6 dgui

dgui

    Resigned

  • Resigned
  • 5,563 posts
  • Locationusa

Posted 17 June 2013 - 10:23 AM

Not Practical.

 

Way too Slow.



#7 Dr J

Dr J

    2000 Post Club

  • +Member
  • 2,052 posts
  • LocationCayman Islands

Posted 17 June 2013 - 10:05 PM

Do finger and forearm exercise, such as squeezing a sponge ball. I find it helps.

#8 Arturito

Arturito

    750 Post Club

  • Registered
  • 985 posts
  • LocationChile

Posted 17 June 2013 - 10:24 PM

maybe can harm accuracy, at least for me is very important the pouch feeling, ... lol dgui I am a way slow to load "normal", with this gadget slower even !!!

Cheers

Arturo






--Click to Remove Ads--