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

Latest topics

» The world speed record is broken
by c sitas Today at 11:26 am

» Folding Stock Bullet-bow Project
by c sitas Tue Apr 26, 2016 5:46 pm

» Cased Bullet Bow Lock
by SEPTUA Mon Apr 25, 2016 9:42 am

» Cheap easy crossbow build yielding effective hunting weapon
by c sitas Sun Apr 17, 2016 7:28 pm

» Homemade endless loop string jig.
by Gnome Sun Apr 17, 2016 9:21 am

» Prod specs
by Onager Lovac Tue Apr 12, 2016 3:02 pm

» Pulley/Cam design
by c sitas Mon Mar 14, 2016 7:05 pm

» Alternative stirrups?
by Onager Lovac Tue Mar 08, 2016 4:31 pm

» Aluminum sear plate for an under-100lb crossbow?
by Geezer Sun Feb 28, 2016 7:04 am

» I Found a Full Can of Chili in the Woods (video)
by Xamllew Thu Feb 04, 2016 10:06 pm

» Another one
by phuphuphnik Thu Feb 04, 2016 2:31 pm

» Well it works!
by c sitas Tue Feb 02, 2016 9:36 pm

» First deer down with xbow!!!!!!
by Armymedic.2 Sun Jan 31, 2016 1:27 pm

» Crossbow string question
by mazawakhan Fri Jan 29, 2016 10:53 am

» Oh god what am I doing
by TheCorvus Thu Jan 28, 2016 2:20 am

» I need to your opinion with my crossbow site.
by kenh Wed Jan 27, 2016 2:28 pm

» Custom Cobra Crossbow pistol
by Outlaw Wed Jan 27, 2016 10:20 am

» Сranequin XVI (replica)
by SEPTUA Tue Jan 26, 2016 8:32 am

» My Newest Crossbow
by Onager Lovac Mon Jan 25, 2016 7:16 pm

» My newest lock now with more pictures
by phuphuphnik Sat Jan 23, 2016 11:30 pm

» Twinbow 2 plus extras for sale
by Hedgewolf Thu Jan 21, 2016 6:24 am

» Hex Nut Plinking Bolts
by phuphuphnik Wed Jan 20, 2016 12:03 am

» Bolt question
by mazawakhan Fri Jan 15, 2016 11:00 pm

» Arrow speed
by c sitas Tue Jan 12, 2016 5:22 pm

» First Crossbow - Tension Bar Carbine
by Xamllew Thu Dec 31, 2015 3:19 pm


WW2 Big Joe 553.545

    WW2 Big Joe 5

    Share

    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:05 am

    Hello
    Member from this forum for some month (but experienced French crossbow builder) I decided to bring my contribution whit one of my work: The OSS BJ5 replica. For this, many thanks to Dr Brunner whit his constant help and encouragement . I bring some modifications due to the fact that I have not the wealth of the OSS research department and I had to build it whit the usual hand tool that you by in any tool general store...I am not sure to master the pictures uploading. First a picture from the original,then my version in detail.

    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:07 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:13 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:16 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:18 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:20 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:22 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:24 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:25 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:27 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:29 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:31 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:32 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:35 am


    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Sun Aug 07, 2011 9:38 am

    Don't pay attention to dates on the pictures the first camera never could be set in the right time!!!
    If any questions ?

    Basilisk120
    Moderator
    Moderator

    Posts : 542
    Join date : 2010-03-01
    Age : 37
    Location : Arizona

    Re: WW2 Big Joe 5

    Post by Basilisk120 on Sun Aug 07, 2011 10:58 am

    Wow that looks great! Definitely something different. How does it shoot? Do you have any stats on it like draw weight or arrow speed?

    While I am asking questions, Do you have any information on the original, like if it was ever used or was it an OSS proof of concept?


    You certainly captured the feel and look of the original. I really like this.



    Something Something Dark Side

    Archer46176
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 32
    Join date : 2011-04-19

    Re: WW2 Big Joe 5

    Post by Archer46176 on Sun Aug 07, 2011 5:44 pm

    Deleted
    Paul


    Last edited by Archer46176 on Wed Mar 07, 2012 2:43 pm; edited 1 time in total

    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Mon Aug 08, 2011 9:08 am

    Thank Basilisk.
    THE LBJ5
    Velocity: 180fps
    Accurate lethal range: 60 yards/150 yards
    Extreme range: 260 yards
    dart: 44g (678 grain)
    rubber pull: 550#
    150 rubber ring x2 = 300 rubber ring
    Draw 10"
    You can find those stats and a lot more in the Bible of Dr BRUNNER.:
    THE OSS CROSSBOW,
    ISBN-0-932572-15-4

    Some of the different models where send for trial in England,others in Sloma in South Pacific they where tried by Carlson's raiders, Alamo Scouts in new Guinea. But no report of there use in operations.
    All of the different modèle (little Joe,Joe pedal, big Joe 4/5/6,William Tell) where proposed to the allied, but at this stage of the war other silents fire arms where in service some very efficient (verlord,Delisle,etc..)and preferred. Military are quite traditional,they believed and feared that a Jape whit a bolt in the neck would run in circel yelling like a chicken!!! Of cource they where wrong (Australian had Arrowspeed crossbow in New Guinea and at least they used for improve the pot!!)but the real weakness of those crossbow are the rubber: very fragile to heat greas moisture and difficult to replace.It is interesting to see that Since end of 1942 to 1945 a hall department of North West university work for this and make incredibly complicate a simple concept we have an expression for this in France : to produce a "wind machine".Nerveless this crossbow is incredibly interesting to produce and it work pretty well.

    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Mon Aug 08, 2011 9:15 am


    Basilisk120
    Moderator
    Moderator

    Posts : 542
    Join date : 2010-03-01
    Age : 37
    Location : Arizona

    Re: WW2 Big Joe 5

    Post by Basilisk120 on Fri Aug 12, 2011 7:17 pm

    Thanks for the details.

    Not quite the speed machine one would expect but I suppose with weight of the moving parts and what not it would keep the performance down.

    But once again nice looking reproduction. I really like seeing people do out of the ordinary or odd reproductions. I guess I just like the strange and arcane.



    Something Something Dark Side

    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Mon Aug 15, 2011 3:15 pm

    It is not what I wanted to say: I mean that some time when you gather lot of brilliant brain around the same problems ,the result will be very complicate rather to be simple ...But you are right 180 fps for 500# is disappointing... This is the main problem whit rubber: when you stretch it quickly it produce some heat and lost lot of power and if you wait before realising the power drop even more!!! Richard Middleton produce a brilliant demonstration of this phenomena on his book: "Man-Powered Bullets". Here the rubber unit template :

    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Mon Aug 15, 2011 3:20 pm

    Some rubber rings

    Basilisk120
    Moderator
    Moderator

    Posts : 542
    Join date : 2010-03-01
    Age : 37
    Location : Arizona

    Re: WW2 Big Joe 5

    Post by Basilisk120 on Mon Aug 15, 2011 10:24 pm

    jeep wrote:It is not what I wanted to say: I mean that some time when you gather lot of brilliant brain around the same problems ,the result will be very complicate rather to be simple
    Laughing LoL That is so so true. I really get how that was originally designed. I think I have been on similar committees unfortunately Mad



    But thanks for the information on the limiting factor of the rubber. I do like the drawing



    Something Something Dark Side

    Ivo
    Admin
    Admin

    Posts : 1041
    Join date : 2009-11-25
    Age : 28
    Location : NJ, USA

    Re: WW2 Big Joe 5

    Post by Ivo on Tue Aug 16, 2011 2:40 am

    Hi jeep,

    For the past few days I've been catching up slowly on my reading of the webarcherie forum. Very slowly and I haven't gotten to your build yet. I only know four languages, but it proves that knowing five or six would have been better. Smile

    Your build is very interesting, especially considering it's a "replica". The fact that you built it out of readily available materials with common tools is also another point worth alot of appreciation and experience gained in doing so is unmatched.

    I have done a little bit of research on this crossbow a few years ago, but unfortunately I was also researching everything else at the time and didn't have a chance to truly dedicate myself to this particular design. However, it was very inspiring in a sense that it presents a few very interesting structural solutions that can be used in synthesizing new designs.

    I don't have access to a computer at this moment, so all I can do is complement you on the job well done and thank you for this fantastic contribution. There is lots to discuss in this crossbow and perhaps you will be interested in hearing/seeing some unique thoughts we have floating around on this forum that might just fit as improvements on the given platform.

    Thank you for sharing, it was a pleasure viewing this build and I hope to discuss it further in the near future.

    Regards,

    Ivo




    * *
    ~ "I don't have any special talents. I'm only passionately curious."
    * * *
    ~ "All Genius is Simple"
    * *

    jeep
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 379
    Join date : 2011-04-07

    Re: WW2 Big Joe 5

    Post by jeep on Tue Aug 16, 2011 3:31 am

    Thank IVO. Of cource I would be interested to discussion about this item end possible improvements.I think that the designe is pretty good but it can be simplify ,it should be possible to use other mean of propulsion, I am sure engineers can tell us that new elastic tread can replace rubber whit better resilience and stability like carbon or else. In this case whit the use of lighter material for the frame this crossbow could be near perfect.If you want to see my work in webarcherie my pseudo is OWL

    Sponsored content

    Re: WW2 Big Joe 5

    Post by Sponsored content Today at 1:46 pm


      Current date/time is Thu Apr 28, 2016 1:46 pm