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Main Boards => The Bowyer's Bench => Topic started by: l979 on August 10, 2013, 11:02:00 PM

Title: "The Flat Bow" design confusing
Post by: l979 on August 10, 2013, 11:02:00 PM
Hey there everybody!
I'm John from Minneapolis. I'm looking into building my first bow and this seems to be the forum to go to. Looking forward to be a member!

I was looking in the Archery online library and liked this flat bow design:  http://www.archerylibrary.com/books/flatbow/docs/flatbow02.html
My question is how the distance from the two A lines to the center of the handle is going to be equal? If the center of grip(cog) is 1" of the center of bow(cob) and divide the limbs in thirds measuring from cog how can they be? Am I misunderstanding or missing something here?
Title: Re: "The Flat Bow" design confusing
Post by: Bob at Work on August 11, 2013, 12:54:00 AM
the bottom limb is shorter...lots of builders do it that way to make the bottom limb slightly stiffer and create a positive tiller.
Title: Re: "The Flat Bow" design confusing
Post by: Sal on August 11, 2013, 01:28:00 AM
That's a great little book, I made my first bow out of that design.
Title: Re: "The Flat Bow" design confusing
Post by: John Scifres on August 11, 2013, 09:14:00 AM
It's not going to be equal.  The reasoning gets into too much theory for now.  Just follow the directions.  It's like making a recipe in the kitchen for the first time.  I follow the recipe exactly until I understand how changes may affect the outcome.
Title: Re: "The Flat Bow" design confusing
Post by: l979 on August 11, 2013, 10:12:00 AM
Ok thanks guys! I drew it and when I got to the part where it said the lines needed to be equidistant from the handle I got thrown off. I'll go with what I got and if it turns out it does, I'm sure I'll learn something. Btw, can I use a rift sawn board and back it for this design?
Title: Re: "The Flat Bow" design confusing
Post by: John Scifres on August 11, 2013, 10:17:00 AM
Here's a good board bow tutorial.   http://sticknstring.webs.com/ferretsboardbow.htm
Title: Re: "The Flat Bow" design confusing
Post by: Bowjunkie on August 11, 2013, 12:42:00 PM
Bob, that's not why folks make the bottom limb shorter. Actually, a bow with a shorter bottom limb can be tillered so that it has either equal, negative, or positive tiller.
Title: Re: "The Flat Bow" design confusing
Post by: John Scifres on August 11, 2013, 01:34:00 PM
Don't get distracted by too much theory right now.  Just make some bows.
Title: Re: "The Flat Bow" design confusing
Post by: Bob at Work on August 11, 2013, 02:10:00 PM
thanks...I understand that you can tiller it however you want...just trying to easily explain why lots of people make the bottom limb shorter/stiffer.   :)
If Sal can make a bow using that diagram...you should easily be able to do it... LOL.
  :biglaugh:
Title: Re: "The Flat Bow" design confusing
Post by: Sal on August 12, 2013, 11:25:00 PM
Hey, I do make bows, I just take a long time to finish them, a long time.    ;)
Title: Re: "The Flat Bow" design confusing
Post by: SEMO_HUNTER on August 13, 2013, 02:01:00 AM
You may want to think about a bow that bends through the handle? Just sayin. I made one from a bendy piece of osage and it's still a shooter, that's what the Indians shot and killed many critters with it. BTW-Bowjunkie is a techie snob.
Title: Re: "The Flat Bow" design confusing
Post by: SEMO_HUNTER on August 13, 2013, 02:22:00 AM
Bowjunkie probably hates me know? LOL
Title: Re: "The Flat Bow" design confusing
Post by: SEMO_HUNTER on August 13, 2013, 02:23:00 AM
Hey, just make it, show it off and applaud yourself for a great job! When it breaks, just make a new one, that's what I do!
Title: Re: "The Flat Bow" design confusing
Post by: Bowjunkie on August 13, 2013, 06:02:00 AM
A techie snob? I don't even know what that is. LoL
Title: Re: "The Flat Bow" design confusing
Post by: Roy from Pa on August 13, 2013, 06:55:00 AM
Well ya are one.. LOL  :laughing:
Title: Re: "The Flat Bow" design confusing
Post by: Bowjunkie on August 13, 2013, 08:21:00 AM
Well, whatever it is, I'm ok with it... believe it or not, I've been called worse    :dunno:
Title: Re: "The Flat Bow" design confusing
Post by: SEMO_HUNTER on August 13, 2013, 12:41:00 PM
Just pickin at ya Bowjunkie.   ;)
Title: Re: "The Flat Bow" design confusing
Post by: Bowjunkie on August 13, 2013, 02:10:00 PM
Well stop it. I'm sensitive.
Title: Re: "The Flat Bow" design confusing
Post by: Roy from Pa on August 13, 2013, 02:15:00 PM
Ya Right......  :laughing:
Title: Re: "The Flat Bow" design confusing
Post by: The Gopher on August 13, 2013, 04:48:00 PM
John, I'm from Eden Prairie, I'm real busy the next couple weeks, but give me a shout if you want some help. Like other said, follow the recipe and see what you get out of it, you learn so much in your first few bows by trial and error, the 3rd 4th and 5th ones get a lot easier, then after a few dozen you almost feel like you know what you're doing  :)
Title: Re: "The Flat Bow" design confusing
Post by: l979 on August 15, 2013, 08:58:00 AM
Hey there guys!
My lesson nr.1: knots go deeper then you think.

I started on a piece of Hickory and I know there should not be any knots in the wood but they were so small and I thought they would go away as the bow narrows. They're on the belly and left side and it will be backed. Am I wasting my time on this one?
 (http://i1104.photobucket.com/albums/h330/geek_usa80/IMG_7637.jpg) (http://s1104.photobucket.com/user/geek_usa80/media/IMG_7637.jpg.html)
Dan,
Thanks, I appreciate the offer!
Title: Re: "The Flat Bow" design confusing
Post by: The Gopher on August 16, 2013, 08:39:00 AM
i think you're OK to give it a try, especially with hickory. Just proceed with caution and as you start to stress the limbs keep an eye on the knots.
Title: Re: "The Flat Bow" design confusing
Post by: hickorystyk on August 17, 2013, 07:50:00 PM
I was taught to make the limbs equal length and the arrow rest is actually 1" higher than center.  It seems to work well (with correct tillering).  I guess it might make tillering a little easier but i don't know if that 1" out of center robs you of any speed or cast.  Thoughts?
Title: Re: "The Flat Bow" design confusing
Post by: hickorystyk on August 17, 2013, 08:02:00 PM
I was taught to locate the arrow rest 1" above the  center of the bow so the limbs are equal lengths.  I don't know if this robs the bow of any speed or cast but it seems to work well if tillered correctly.  Thoughts?
Title: Re: "The Flat Bow" design confusing
Post by: hickorystyk on August 17, 2013, 08:06:00 PM
Sorry for 2 post.  Having internet problems.