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    Coil spring powered "crossbow"

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    Kale Schlegel
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    Coil spring powered "crossbow"

    Post by Kale Schlegel on Tue Aug 21, 2012 5:14 pm

    Ok! Been looking up designs for triggers online for a while. Found a few off of Youtube,one being crushingneonbabies trigger and Jasonwemp's take on it. Made a plexi mock-up of my slight variations to it. Now this is by no means complete. Its just the start of the backwards engineering process.





    I've pretty much got the safety down. But I wanted to add a thumb grip safety like a 1911, any help? Oh also when done in mild steel id like to case harden, but i have no idea how , so any additional help would be appreciated! thanks -

    kale



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    Todd the archer
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    Re: Coil spring powered "crossbow"

    Post by Todd the archer on Tue Aug 21, 2012 6:07 pm

    I like the plexiglass mock up. I use cardboard first then if that looks good move on to luan plywood.



    A suggestion if I may regarding the sear contacts and overall geometry of the linkage: When pulling the trigger slowly the catch that holds the bow string back should not roll either forward or backwards all until release. If it roll forward it may not hold weight and if it rolls back trigger pull will get harder.



    Here is a page From the late Robin Allen's website on case hardening. I have used the method myself and so far so good.

    http://www.thecrossbowmansden.com/Triggers.html

    Todd
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    Kale Schlegel
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    Re: Coil spring powered "crossbow"

    Post by Kale Schlegel on Tue Aug 21, 2012 6:31 pm

    Thanks for the input Todd ! I'll look into that link asap.
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    Kale Schlegel
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    Re: Coil spring powered "crossbow"

    Post by Kale Schlegel on Wed Aug 22, 2012 8:22 pm

    So I read that link. Does that sugar method work for mild steel ? I'm certain it might, I only ask because it had two methods for case hardening and one said mild stock the other wasn't clear. Worth a try for sure.
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    Todd the archer
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    Re: Coil spring powered "crossbow"

    Post by Todd the archer on Thu Aug 23, 2012 2:17 am

    I used the sugar method and so far so good. Athough I have not taken my crossbow apart to inspect for wear I have shot it quite a bit and has been working fine.



    Todd
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    Kale Schlegel
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    Re: Coil spring powered "crossbow"

    Post by Kale Schlegel on Fri Aug 24, 2012 4:07 pm

    Been thinking about my design again. Wouldn't a giant spring sealed off cause a pressure build up? I'm trying to figure this out in my head while typing this so forgive me if I slide off course.For one , could this be an air source for a air powered crossbow? slip on a arrow or bolt down a small diameter pipe and the internal pressure seal of the spring with a piston... would this give any pressure towards firing an arrow at any speed? And secondly, how loud would a coil spring crossbow be? I'd imagine it'd make a loud rattle if there wasn't any rubber or foam dampeners. I'll try to put my words into picture form. Smile

    Kale
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    Todd the archer
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    Re: Coil spring powered "crossbow"

    Post by Todd the archer on Fri Aug 24, 2012 6:33 pm

    Here is one that works on vacuum. In Russian maybe if Ivo see's this he can explain.
    http://www.youtube.com/watch?v=VcoiFQwV7u4&feature=channel&list=UL


    Todd
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    Phil Abrahams
    Talisman Crossbows

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    Re: Coil spring powered "crossbow"

    Post by Phil Abrahams on Sun Apr 14, 2013 1:40 pm

    Good to be back as i have been working hard on my up and coming mech x bow the Mantis that russian guy make's a very fascinating crossbow working on vacume power great to see other inventor's making cool thing's.My gas spring powered bow will be ready for sale in around 12 week's time so now other's can have a weapon like this should be interesting to see how it fare's in the hunting and shooting sport's you can see the pre production Mantis in action on the Talisman crossbows facebook page and find out all the info there.Everyone fine here i love this website it is very interesting here with all kind's of fascinating project's going on.

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    Re: Coil spring powered "crossbow"

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