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

Latest topics

» Yet another one
by jocky Today at 7:09 am

» Chinese crossbow with auxiliary string?
by c sitas Yesterday at 11:34 am

» Crusader crossbow
by c sitas Thu Jun 22, 2017 9:41 pm

» Whamo showed up, prod replacement ideas
by kenh Mon Jun 19, 2017 4:25 pm

» Renaissance Sporting crossbow
by tony a Mon Jun 19, 2017 2:10 am

» 15th century saxon prods
by Geezer Sun Jun 18, 2017 10:46 pm

» loose laminate issues
by c sitas Sun Jun 18, 2017 8:42 am

» Of Bows and Torsion Engines
by c sitas Fri Jun 16, 2017 2:55 pm

» My second crossbow
by Daniel Levesque Fri Jun 16, 2017 10:48 am

» Need to locate Windlass Crossbow, pre 1600, in Rome, Venice, or Florence
by 8fingers Tue Jun 13, 2017 11:24 pm

» Crossbow Projectiles
by Geezer Tue Jun 13, 2017 8:10 pm

» Greetings!
by OnlyHuman Mon Jun 12, 2017 7:40 am

» Anyone know what this is?
by Yuki23emma Sun Jun 11, 2017 2:54 pm

» Prod specs
by Onager Lovac Mon Jun 05, 2017 4:25 pm

» Finished Crossbow
by kenh Sat Jun 03, 2017 8:34 pm

» The Arbalist Guild - Around the World
by Turnigy Fri Jun 02, 2017 1:25 pm

» Reverse draw "compound" build
by Turnigy Fri Jun 02, 2017 1:20 pm

» Casting Resource
by White Oak Wed May 31, 2017 2:28 am

» The Road so far......
by White Oak Mon May 29, 2017 7:17 am

» GLOSSARY OF TERMS
by Onager Lovac Wed May 24, 2017 6:41 pm

» Hello from Maine
by White Oak Sun May 21, 2017 11:06 pm

» Leonardo Da Vinci string with suport-rolls
by Oppenheimer Tue May 16, 2017 11:40 am

» Compact repeating compound project
by Phil Abrahams Mon May 08, 2017 2:10 pm

» Trying to reduce the power stroke in my next project
by octavioaugusto.oliveira Thu Apr 27, 2017 1:27 pm

» Its good to be back!!
by Juan galeano Tue Apr 25, 2017 9:31 am


    RDT (Reverse Draw Technology) crossbow building

    Share
    avatar
    patandjali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2014-03-23
    Age : 41
    Location : Eastern UE

    RDT (Reverse Draw Technology) crossbow building

    Post by patandjali on Sat Mar 29, 2014 11:49 pm

    Reverse bow system has many advantages besides classic crossbow:
    -center of gravity of the crossbow is exactly in the middle
    -Is much narrower, it can maneuver more easily
    -no shock at shooting
    -in a relatively short crossbow very long Power Stroke.
    -long Power Stoke- higher speed.

    Materials

    materials we need to build
    - aluminum-plate 8 mm
    - leaf spring 6mm
    -hardwood
    -bowstring materials
    perseverance Very Happy 




    avatar
    patandjali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2014-03-23
    Age : 41
    Location : Eastern UE

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by patandjali on Sun Mar 30, 2014 12:14 am

    LINK fixed
    https://www.youtube.com/watch?v=JPc1tAUo01E


    Last edited by patandjali on Sat Jun 07, 2014 10:51 pm; edited 1 time in total
    avatar
    patandjali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2014-03-23
    Age : 41
    Location : Eastern UE

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by patandjali on Sun Mar 30, 2014 12:21 am

    some pictures
    http://www.kephost.com/view3.php?filename=a1_2014_3_30_xwsersmnlm.jpg
    http://www.kephost.com/view3.php?filename=a1_2014_3_30_xq08oqtcmf.jpg
    http://www.kephost.com/view3.php?filename=a1_2014_3_30_ki4jdb6de4.jpg

    phuphuphnik
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 146
    Join date : 2013-12-02
    Location : The wastes West of Chicago

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by phuphuphnik on Sun Mar 30, 2014 4:49 am

    That is a  mean looking little bow! Is there a cocking assist, or is it hand spanned? I was looking at modern crossbows ( a Barnett Razr), and they were very front heavy, the balance you describe would make for more precise shooting.  
    cheers,
    chriso


    Aceasta este o medie în căutarea arc mic! Există o armare asista, sau este calibrat mână? M-am uitat la arbalete moderne (un Razr Barnett), și au fost foarte grele din față, echilibrul pe care o descrieți-ar face pentru fotografiere mai precise.


    Last edited by phuphuphnik on Sun Mar 30, 2014 5:04 am; edited 1 time in total (Reason for editing : tranlated to Romanian)
    avatar
    Todd the archer
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 581
    Join date : 2010-02-25
    Age : 55
    Location : sellersville,pa.

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by Todd the archer on Sun Mar 30, 2014 7:39 am

    Great job, well done!

    Todd
    avatar
    Hotspur
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 150
    Join date : 2012-06-28
    Location : British Columbia, Canada

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by Hotspur on Sun Mar 30, 2014 10:36 am

    Very nice! 

    Is there anything you would change?
    avatar
    patandjali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2014-03-23
    Age : 41
    Location : Eastern UE

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by patandjali on Sun Mar 30, 2014 11:01 am

    Link fixed
    https://www.youtube.com/watch?v=qYLzUSHT7QY


    Last edited by patandjali on Sat Jun 07, 2014 10:53 pm; edited 1 time in total

    MRobin
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 67
    Join date : 2012-09-01
    Age : 27
    Location : Paris, France

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by MRobin on Mon Mar 31, 2014 4:52 am

    Damn nice, what speed?
    avatar
    Anatine Duo
    Techno Weeny

    Lets put a laser on it!!!


    Techno WeenyLets put a laser on it!!!

    Posts : 57
    Join date : 2013-10-07
    Location : Muskoka, Canada

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by Anatine Duo on Mon Mar 31, 2014 8:12 am

    pretty nice, always great to see handmade cams!
    avatar
    patandjali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2014-03-23
    Age : 41
    Location : Eastern UE

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by patandjali on Tue Apr 01, 2014 9:35 pm

    Thx,boys Smile 

    The arrows ballistics test on the top.
    http://www.excaliburcrossbow.com/content/arrow_ballistics
    https://www.youtube.com/watch?v=gpLxB2sFYs4&feature=youtu.be

    phuphuphnik
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 146
    Join date : 2013-12-02
    Location : The wastes West of Chicago

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by phuphuphnik on Wed Apr 02, 2014 4:39 pm

    I built one of these coil chronometers. It works well until you shoot one of the coils...

    http://www.archerytalk.com/vb/showthread.php?t=1485256
    avatar
    Hotspur
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 150
    Join date : 2012-06-28
    Location : British Columbia, Canada

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by Hotspur on Wed Apr 02, 2014 6:55 pm

    There is the tried and true ‘click-thwack’ method of determining average bold speed:
     
    Put your cell phone in the middle of the range (try not to shoot it).  The middle of the range cancels out speed of sound error.
     
    Turn on an audio recording app.
     
    Shoot.
     
    Look at the audio file ‘click-thwack’ in Audacty  http://audacity.sourceforge.net/ and measure the milliseconds of flight time. 


    phuphuphnik
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 146
    Join date : 2013-12-02
    Location : The wastes West of Chicago

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by phuphuphnik on Thu Apr 03, 2014 12:33 am

    Hotspur, that is brilliant!
    avatar
    Hotspur
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 150
    Join date : 2012-06-28
    Location : British Columbia, Canada

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by Hotspur on Thu Apr 03, 2014 7:48 am

    I wish I could take credit, but I swiped the idea here somewhere Smile

    A couple of tips: download an app that records in an Audacity friendly format like mp3.

    The button second from the top right 'Fit Selection' zooms in to whatever is highlighted.  Then if you highlight your shoot sound the time is displayed in the bottom centre readout.  In the photo it says .247, my range was 50 feet so: 50/.247 is 202 feet per second.

    Important to note this is the average speed and not a chronometer muzzle velocity.  Some smarty-pants math type might be able to write us an Excel equation to calculate muzzle velocity? Anyone? Smile
    avatar
    patandjali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2014-03-23
    Age : 41
    Location : Eastern UE

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by patandjali on Thu Apr 03, 2014 12:14 pm

    Thank you Smile 
       305 fps arrow broadheads(650 grains) 325 fps arrow > 540 grains ,350 fps arrows >460 grains Very Happy


    Last edited by patandjali on Sat Jun 07, 2014 11:02 pm; edited 1 time in total
    avatar
    Hotspur
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 150
    Join date : 2012-06-28
    Location : British Columbia, Canada

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by Hotspur on Thu Apr 03, 2014 5:57 pm

    patandjali wrote:Thank you Smile 
    325 fps arrow 30 gramms Very Happy 

    Wow, very nice!

    Hermit
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 245
    Join date : 2013-09-10

    Cam questions

    Post by Hermit on Sun Apr 06, 2014 8:24 am

    I have no experience at all with cam action bows,so have some questions about how this bow is strung.
    1)Is the string a closed loop
    2)If the string is not a closed loop,how is is secured.From the photographs,it appears to to be fixed somehow to the small cams.If it's possible,a photograph showing how the string is secured would be extremely helpful,and very much appreciated,as I am completely stuck on this.
                                    Hermit.
    avatar
    patandjali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2014-03-23
    Age : 41
    Location : Eastern UE

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by patandjali on Sun Apr 06, 2014 12:29 pm

    Here you are,if you'll help
    http://www.kephost.com/view3.php?filename=a1_2014_4_6_560zpei5e7.jpg
    http://www.kephost.com/view3.php?filename=a1_2014_4_6_ywdgn9h3ph.jpg
    http://www.kephost.com/view3.php?filename=a1_2014_4_6_o962k6d629.jpg

    https://www.youtube.com/watch?v=RMKS4lL8sG0

    phuphuphnik
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 146
    Join date : 2013-12-02
    Location : The wastes West of Chicago

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by phuphuphnik on Sun Apr 06, 2014 12:37 pm

    Those cams are wonderful sir ಠ_ರೃ

    Hermit
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 245
    Join date : 2013-09-10

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by Hermit on Mon Apr 07, 2014 8:16 am

    Thank you Patandjali,that was the last piece of the puzzle,all that is left to do now,is gather materials,make the cam templates,and build.I am sure I'll come across problems and snags during construction,but thanks to you,I know they can be overcome
                                                               Hermit.
    avatar
    patandjali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2014-03-23
    Age : 41
    Location : Eastern UE

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by patandjali on Mon Apr 28, 2014 10:51 am

    Hello !

    Technical problems internet and were the old channels  study 
    but I made a new one if anyone's interested   
    https://www.youtube.com/channel/UCghexPjgEWvlx2jLBNQWruQ

    Have a nice day !

    jaeger22
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 153
    Join date : 2013-03-15
    Age : 68
    Location : Orlando, FL

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by jaeger22 on Mon Apr 28, 2014 11:20 am

    Thanks patandjali, very nicely done!! cheers 
    And I can't tell you how impressed I am with your build! Just outstanding! cheers  cheers
    avatar
    patandjali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2014-03-23
    Age : 41
    Location : Eastern UE

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by patandjali on Sat May 17, 2014 10:01 am

    Penetrations test , very fast
    https://www.youtube.com/watch?v=bZZeHJ0zCGE
    avatar
    patandjali
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 28
    Join date : 2014-03-23
    Age : 41
    Location : Eastern UE

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by patandjali on Thu May 29, 2014 11:30 am

    Greeting Gentlemens !

    If someone wants to build arrow, are very resistant  Very Happy 
    https://www.youtube.com/watch?v=ftlCyyeLZE4
    avatar
    Pellethuntr
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 12
    Join date : 2011-02-22
    Age : 24
    Location : Livonia NY

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by Pellethuntr on Fri May 30, 2014 9:28 am

    That's some great stuff you are working on can't wait to see more!

    Sponsored content

    Re: RDT (Reverse Draw Technology) crossbow building

    Post by Sponsored content


      Current date/time is Sun Jun 25, 2017 8:07 am