Need Crossbow Trigger Help

I need some help with this heavily modded Reaper, I need a sturdy trigger to fire the crossbow, but that has been proven too difficult for me as I don't have much trigger mech experience. At one point I had it fully working when not loaded, untill it snapped the trigger when I tried to fire an arrow. :P

Picture of Need Crossbow Trigger Help
Modded Reaper 004 (Large).jpg
Modded Reaper 002 (Large).jpg
Modded Reaper 003 (Large).jpg
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DeHeld87 years ago
I don't mean to be annoying but eh...

Technically that device is not a crossbow. A crossbow is a BOW mounted on a stave with a mechanical string release aid.

A bow stores potential kenetic energy in it's elastic LIMBS. The string on a bow ideally does not strech or store any energy like an elastic band.

On this device however, the "bow" is a solid, non moving and non energy storing construction, and all the potential kenetic energy is stored in the elastic string. Therefore this device should be classified as a "catapult" or maybe "balistae". But certianly not a "crossBOW"

I'd suggest even that you would make the "bow" not in a bend backward shape (so that it looks like a bow) but that you make it straight or even make the ends of the "bow" pointing forward so that you have a strong triangle shape to resist the tension of the elastic band. This will mean you will need less K'nex to strenghten the "bow" and thus make a lighter device.
bow_how it works.gif
Wicky (author)  DeHeld87 years ago
Thanks for the information, but I knew all of this already. The name is derived from the weapons I made when I was small (12 years old). Back then I would just copy the shape of a crossbow and try to make it work.
This is an outdated 'crossbow' anyway, many other options have been tried after (straight 'bow' fails, outward bend works fine).
It would rather fall into the slingshot category.
can you post instructables for it i rilly wunt to build it to shot my anoying brother?
King_Banana9 years ago
1 word: string
Wicky (author)  King_Banana9 years ago
I did try that....but it has been taken apart weeks ago :P
Doctor Who9 years ago
build your old trigger that worked then ducttape/super glue it
Wicky (author)  Doctor Who9 years ago
Well it depends on which one you mean...if you mean the rubberband gun'll never work...have you ever seen how much strain there is on the arrow? : |
Storm950 Wicky9 years ago
Nope, I meant more like a DrummerIan trigger, ratchet system.
Wicky (author)  Storm9509 years ago
Pff there is nothing wrong with this trigger (see pic). I just want it to connect to the bottom :o
4-arrow trigger 001 (Large).jpg
Storm950 Wicky9 years ago
I never said there was, you asked for trigger help, your trigger is good and fits your gun perfectly, so thats that no more help needed, right?
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