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Hicapa Short Stroking

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Old October 16th, 2010, 22:18   #1
turok_t
 
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Hicapa Short Stroking

Hey guys, currently my hi capa is short stroked with 3 washers with an AIP spring. Im planning to short stroke it even more ater seeing others where they can short stroke their pistols like crazy... how do u put your recoil rod and bushing inside the slide if its short stroked soo much? I already have a hard time putting mine in.. any tips would be appreciated.
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Old October 17th, 2010, 01:25   #2
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How are you going to assure that the nozzle body is pulled back to load the next pellet? It's one of the issues of short stroking, you have to also get the nozzle body to pull back sooner.
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Old October 18th, 2010, 00:09   #3
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This is the result of StrikeFreedom and I plinking with our guns.. Barely any recoil or slide movement.. extremely short stroked..

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Old October 18th, 2010, 01:03   #4
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But does it actually chamber and shoot BB's?
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Old October 18th, 2010, 01:20   #5
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we added a stiffer bbu spring so the nozzle returns back quicker
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Old October 18th, 2010, 01:25   #6
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Still didn't answer the question but I'll assume "yes".
Chronied it yet? You might have some wacky numbers.
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Last edited by Styrak; October 18th, 2010 at 01:32..
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Old October 18th, 2010, 02:41   #7
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A stiffer nozzle spring is a pretty easy way to get the nozzle to pull back earlier. I guess a cleaner way to short stroke a nozzle would be to put a small spring guide inside the spring which bottoms out and gets the nozzle to pull back.
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Old October 18th, 2010, 18:23   #8
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Still didn't answer the question but I'll assume "yes".
Chronied it yet? You might have some wacky numbers.
Answer to your question is yes. Didn't have a chance to chrono it yet but it really shouldn't affect the FPS?

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A stiffer nozzle spring is a pretty easy way to get the nozzle to pull back earlier. I guess a cleaner way to short stroke a nozzle would be to put a small spring guide inside the spring which bottoms out and gets the nozzle to pull back.
That spring guide must be toothpick tiny, and it's very likely for it to drop out of place since nothing is supporting it from underneath. So we went with a stiffer spring instead.


However, people that do shortstroke their guns probably have reach their limit anyways, that is, enough to pull back the slide and insert the slide catch. In the video above/my setup, I don't use a slide catch.
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Old October 18th, 2010, 22:23   #9
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I dont' think your muzzle velocity would necessarily be all over the place. The Hicapa operates on discrete gas pressure phase where a drop in breech pressure puts the gun into recoil mode. Since the pellet has to leave the barrel for the breech pressure to drop, the shorter stroke (which occurs after the pellet is gone) shouldn't affect the muzzle velocity.

I would guess that a spring guide could be machined to fit down the centre of the spring (like a scaled down AEG spring guide) so that the shoulder sits inside the recoil block. I would prefer to have the spring guide bottom out instead of crunching a spring to pull the nozzle back because I find that it fatigues springs to bottom them out repeatedly. I think the coils rub against each other which causes surface wear. I think the spring guide should be adequately captured between the nozzle, slide, and block since the spring is already adequately guided in that groove.

Still a stiff spring is the simplest solution that could be found. If you have a good supply of these bits, then who cares about spring fatigue.
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Old October 18th, 2010, 22:40   #10
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Originally Posted by turok_t View Post
Hey guys, currently my hi capa is short stroked with 3 washers with an AIP spring. Im planning to short stroke it even more ater seeing others where they can short stroke their pistols like crazy... how do u put your recoil rod and bushing inside the slide if its short stroked soo much? I already have a hard time putting mine in.. any tips would be appreciated.
Buy an aftermarket recoil rod that you can screw in. That way you can just line up all your short stroking accessories and then stick the rod in from the muzzle end. If that method doesn't work, stick the recoil rod in from the muzzle end without screwing it in, and slowly load the accessories in that way.
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Old October 19th, 2010, 00:59   #11
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Buy an aftermarket recoil rod that you can screw in. That way you can just line up all your short stroking accessories and then stick the rod in from the muzzle end. If that method doesn't work, stick the recoil rod in from the muzzle end without screwing it in, and slowly load the accessories in that way.
thanks slono just ordered one!
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