The Arbalist Guild

Would you like to react to this message? Create an account in a few clicks or log in to continue.

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

Latest topics

» 12th Century Chinese Crossbow Chronographed
by stuckinthemud1 Fri Nov 24, 2023 3:50 pm

» Crossbow Stock
by kenh Tue Oct 31, 2023 6:19 am

» Colletiere a Charavines continuing experiment
by stuckinthemud1 Sat Oct 07, 2023 5:36 am

» Cocking - how
by stuckinthemud1 Thu Aug 03, 2023 4:24 am

» Questions around heavy crossbow lath buildin
by stuckinthemud1 Wed Apr 26, 2023 1:10 am

» Arab Crossbow
by stuckinthemud1 Tue Apr 25, 2023 7:57 am

» prod angle, and lever trigger for sale anyone?
by stuckinthemud1 Mon Mar 20, 2023 5:54 am

» flexible string
by jasper1978 Mon Mar 20, 2023 1:25 am

» [solved]Skane/Lillohus crossbow thread
by stuckinthemud1 Sun Mar 19, 2023 7:44 am

» jens sensfelder
by jasper1978 Wed Mar 08, 2023 11:58 pm

» 400lb Windlass crossbow bolts weight and accuracy shooting high.
by stuckinthemud1 Sun Mar 05, 2023 2:53 pm

» Codex Löffelholz crossbow
by stuckinthemud1 Tue Jan 24, 2023 4:14 pm

» Digitar prodsc
by stuckinthemud1 Sun Jan 15, 2023 2:42 pm

» Troubleshooting
by Andy. Fri Jan 06, 2023 12:29 pm

» Wood Prods
by stuckinthemud1 Fri Dec 30, 2022 12:47 pm

» Colletiere a Charavines crossbow
by stuckinthemud1 Fri Dec 30, 2022 8:54 am

» Simplified Löffelhotz speedloader
by stuckinthemud1 Fri Dec 09, 2022 4:05 pm

» Fiberglass H-bows
by c sitas Sat Nov 12, 2022 8:44 am

» Bad Antler
by drawknife Sat Nov 12, 2022 3:48 am

» Anyone make their own bolts?
by Juniper Mon Oct 17, 2022 8:20 am

» Josef alm in English
by Juniper Sat Oct 15, 2022 4:22 am

» Qin/Han lock drawings
by kenh Fri Sep 23, 2022 8:16 pm

» stirrup dimensions?
by stuckinthemud1 Thu Sep 01, 2022 1:49 pm

» Skane/Lillohus lockbow information needed
by stuckinthemud1 Sun Aug 14, 2022 6:23 am

» need help contacting le musee Dauphinois Grenoble
by stuckinthemud1 Sat Aug 13, 2022 3:22 pm


5 posters

    top trigger question

    avatar
    Frode
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!


    Posts : 51
    Join date : 2011-03-17
    Location : Indianapolis, IN

    top trigger question Empty top trigger question

    Post by Frode Wed Mar 30, 2011 8:26 pm

    Hello all,
    My first post, after an introduction, pardon any terminology gaffs.
    I've seen (in the flesh) a crossbow with a short trigger mounted on the top side of the tiller, but can't seem to find any info anywhere. It appears to be a simple lever, push the pad down and the opposite end pushes the string up off its ledge(?).
    Something like this, pardon the bad sketch.
    top trigger question Trigger
    Is there any historical basis for this? Any drawbacks? It seems fundamentally simple, but...

    Thanks,
    Frode
    Basilisk120
    Basilisk120
    Moderator
    Moderator


    Posts : 548
    Join date : 2010-03-01
    Age : 45
    Location : Arizona

    top trigger question Empty Re: top trigger question

    Post by Basilisk120 Wed Mar 30, 2011 10:52 pm

    I know there are historical examples of that kind of lock. I want to say that they are more common on early oriental crossbows.

    The issues arise when dealing stronger bows. As the draw weight goes up it take more and more force to push the bow string up over the ridge. So to get more leverage the lever is going to get so long that it becomes unwieldy or the lever simply is not strong enough and bends instead of lifting the string. So for a simple light weight crossbow. Say a target or small game bow it would be fine.

    I think it would be neat to see a bow with that sort of mechanism.
    Gunnarr
    Gunnarr
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows


    Posts : 7
    Join date : 2011-03-22
    Location : Tampa, FL

    top trigger question Empty Re: top trigger question

    Post by Gunnarr Thu Mar 31, 2011 7:15 am

    That is the type of release on the crossbow I tried out last week. It was built by a gentleman in our local SCA group and had a lever on top you pressed down with your thumb. The lever pivoted upwards (very close to the notch) pushing the string up until it cleared the notch and sent the bolt down range. It was very tough to push down with my thumb, and almost too tough for my wife to do. His crossbow was approximately 60 pounds weight with a 10 inch draw. Your sketch is pretty close except the pivot point is much closer to the end where the string will be, say 3/4 or 7/8 of the way down the length of the lever. He got the design from someone else online, I'm not sure where.
    Geezer
    Geezer
    Master Crossbowyer
    Master Crossbowyer


    Posts : 1194
    Join date : 2010-01-12
    Age : 76
    Location : Austin, Texas, USA

    top trigger question Empty Re: top trigger question

    Post by Geezer Thu Mar 31, 2011 11:47 am

    The top-trigger (sometimes called teeter-totter trigger) is very common on SCA combat bows. It works pretty well for lightweight bows if you plan for sufficient leverage from a stiff trigger. The only downside I see for mounting the lever on top would come from having the release in the middle of your sight picture. Of course if you're shooting big fudgy SCA combat bolts, that's no real problem. You have to elevate a bit to hit your target anyhow. The well-known 'Skane' crossbow (from Josef Alm's "Survey of European Crossbows) uses a bottom-mounted lever that can be made much longer, without interfering with sighting.
    The only printed source I have seen which shows a teeter-totter trigger is one of the the Osprey Men at Arms series. These books are usually fairly well researched, but certainly not infallible. Otherwise, All the documentable notch releases I know of (both asian and European) put the trigger or lever on the bottom. So the teeter-totter is simple... I have no doubt somebody in antiquity tried it, but the Skane bow is quite well documented, and is a proven performer. I recommend you try it instead. Geezer
    juancheco
    juancheco
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.


    Posts : 77
    Join date : 2011-03-21
    Age : 50
    Location : Buenos Aires - Argentina

    top trigger question Empty Re: top trigger question

    Post by juancheco Thu Mar 31, 2011 7:07 pm

    I can´t resist to google it....
    Looks like the beginning of the crossbows, as simple as possible..

    top trigger question Lockbo10

    top trigger question Lockbo11

    top trigger question Lockbo12
    avatar
    Frode
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!


    Posts : 51
    Join date : 2011-03-17
    Location : Indianapolis, IN

    top trigger question Empty Re: top trigger question

    Post by Frode Fri Apr 01, 2011 3:59 pm

    Thanks everyone! Sorry for the delay checking back in (life). I think the bow I saw was probably a light target bow that could be modified for SCA combat bolts. Aluminum prod, too, I remember that.
    I've been asked to put together a target cross bow tiller with a simple trigger mechanism. The requester has had issues in the past with roller nut triggers (binding, wearing, etc.) and hoped to perhaps avoid that in future. Requester will be providing a prod, so I don't know quite how I'll be proceeding yet. It'll probably be in the 60 pound range.
    I'm of two minds, certainly something like the skane bow, or the teeter totter trigger look easier to make, on the other hand setting up to do a proper roller nut would be time well spent. I guess I'll know more when I learn what the weight and reaw of the prod are going to be.
    Thanks again!
    Frode

    Sponsored content


    top trigger question Empty Re: top trigger question

    Post by Sponsored content


      Current date/time is Wed Feb 21, 2024 8:56 pm