Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

Latest topics

» How close to original would you go
by jamesjohnson Yesterday at 4:36 am

» Crossbow bullet bolt's
by Geezer Sun Mar 18, 2018 5:27 pm

» Skane Lockbow replica (and making of)
by Dark Factor Tue Mar 13, 2018 11:46 am

» Moving the nut lugs forward.
by Dark Factor Mon Mar 12, 2018 12:33 pm

» Bridle length and waxing?
by Geezer Sun Mar 11, 2018 9:08 pm

» Draw length VS. prod length on wood prods
by Dark Factor Tue Feb 27, 2018 10:32 am

» Typical dimensions of late Gothic composite bows
by Dark Factor Sun Feb 25, 2018 4:10 am

» Medieval stirrup crossbow
by Dark Factor Fri Feb 23, 2018 10:55 am

» Reciprocating Saw?
by stuckinthemud1 Sun Feb 18, 2018 8:59 am

» Help Needed with Bullet Crossbow Prod
by Crossbowmen Sat Feb 17, 2018 2:43 pm

» Leaving the prod strung?
by JacobL Sat Feb 17, 2018 2:37 pm

» Crossbow for a 8 year old kid
by Daniel Levesque Fri Feb 16, 2018 2:11 pm

» Chinese carpenter make bed crossbow, earlest repeating crossbow and chu-ko-nu
by c sitas Thu Feb 15, 2018 8:49 pm

» Linen or Hemp String
by kenh Thu Feb 15, 2018 10:47 am

» New member
by Geezer Sun Feb 11, 2018 7:00 pm

» Why the ratchet in Greek gastraphetes can hold on the string force?
by Dark Factor Wed Feb 07, 2018 12:20 pm

» How to calculate potential energy in a compound system?
by Alan Case Mon Feb 05, 2018 8:02 pm

» Nut from a pool que ball?
by chaz Mon Feb 05, 2018 7:46 am

» Great Machines
by rickraedeke Thu Feb 01, 2018 8:32 am

» Crossbow Legality Help (Canada)
by JacobL Tue Jan 30, 2018 7:31 pm

» Adding a steel sear insert?
by fester Fri Jan 19, 2018 12:53 pm

» MISFIRES! ...String passing underneath bolt!
by Anatine Duo Fri Jan 12, 2018 6:18 pm

» Best diameter delrin for nut ?
by Geezer Thu Jan 11, 2018 12:08 pm

» Opinions on this Thing?
by JacobL Wed Jan 10, 2018 12:45 pm

» Ideas and designs for a Crossbow Inside A Pipe?
by JacobL Tue Jan 09, 2018 6:38 pm

    Making my first crossbow - need to be sure it's safe


    Fresh Blood

    Doesn't mean
    I'm new to crossbows

    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 1
    Join date : 2014-08-27

    Making my first crossbow - need to be sure it's safe

    Post by Gaeth on Wed Aug 27, 2014 4:09 pm

    Hi, all. I'm going to be making a crossbow for my larp but unfortunately they have no rules specific to crossbows. They are allowed, but the restrictions given for archery aren't helpful when it comes to designing a crossbow - rather, they are more helpful for a standard bow.

    The rules state: "Bows need to be simple recurve bows with no more than 25 pounds at full draw, and with a Draw length of no more than 26”."

    Now, looking at that, I'm thinking that I should be fine with a 50# prod with an 8" powerstroke but as this is my first time making a crossbow, I wanted to get some advice from people with more experience as to whether or not I'm on the right track with this.

    Last edited by Gaeth on Wed Aug 27, 2014 10:59 pm; edited 1 time in total (Reason for editing : Fixed a typo in the subject)
    Master Crossbowyer
    Master Crossbowyer

    Posts : 992
    Join date : 2010-01-12
    Age : 70
    Location : Austin, Texas, USA

    Re: Making my first crossbow - need to be sure it's safe

    Post by Geezer on Wed Aug 27, 2014 9:51 pm

    Making larp crossbows offers extra challenges.  I make a lot of crossbows for SCA, which has similar rules.  They allow 30 lb handbows with a max arrow length of 28 inches, which effectively limits them to @ 22 inches of power-stroke (given a 6 inch brace-height) 30 X 22 = 660 inch- pounds.  For crossbows, SCA generally allows 600 inch-pounds as an approximate equivalent.  If your LARP allows 25 lb. for a similar length arrow (28 in.) you're looking at 25 X 22 = @ 550 inch-pounds. Some LARPS specify archers must use only half-draw for close range... which isn't practical for crossbows... you really can't under- draw. So you might run into problems there... perhaps you could specify a minimum safe shooting range instead.  But that's for you to work out. I already did my time, years ago, arguing with SCA marshallate, to come up with workable power definitions.  Good luck stormin' the castle.  Geezer.

      Current date/time is Fri Mar 23, 2018 12:55 pm