BBI build along, my first backed bow

Started by Echatham, March 02, 2013, 12:14:00 AM

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Echatham

Thanks Roy! I haven't picked a top limb yet, but it may very well be the left, because its got the thicker bamboo, and the ipe is approaching the same thickness as the boo. now that positive tiller is measured from the string to limbs right past the fades while braced... correct?

Roy from Pa


Echatham

7" brace, 50# @ 23". damn near perfect tiller says the gizmo, takes very fine adjustments or i get no mark or a line down the whole limb. 5" to go!




Roy from Pa


Millhimes


Echatham

thanks guys. any pointers for this part of the game? i can definitely see how one could get excited and rush the last bit of tillering. I promise im not going to do that!  the curve on the limbs is consistent all the way down, except 4 or 5 inches from the fades and the last 4 or 5 inches to the tips is a little stiffer. is that what i want, or should i make more bend near the fades and tips... shoot for consistent curve from fade to tip?

Echatham

is it a problem that my ipe is the same thickness as the bamboo, and will likely be a whisker thinner than the bamboo by the time she is done? next time i do a bamboo backed bow i am definitely making it thinner.

Echatham

might be more aptly called a IBB (ipe bellied bamboo)

Roy from Pa

I would use a scraper and remove wood equally from each limb to attain your 50 pounds at your draw length. But I would leave the bow at 54 pounds because it will lose a few pounds in the final sanding and a pound or two shooting it a few hundred times.

Echatham

Roy, Im actually hoping to end up at 47#, thought I said that, but maybe I didnt

Roy from Pa

Ah make up your darn mind, son:) Ok then make her 50 if it makes ya happy:)

Echatham

My mind has been made up ya old fart! i said i was shooting for 50 cause i know its going to drop a few lbs and end up at 47 where i really want it!    :knothead:    :laughing:

Roy from Pa

Figures a sailor kin only pull 47 pounds...    :bigsmyl:

Echatham

haha well im pulling 53# right now, but i can shoot a little lighter much better.

Roy from Pa


Echatham

haha its a deer slaying bow weight is what it is!

Echatham

but ya know, I have been thinkin... 50 is good too. and it requires less scraping to get there (ya im that lazy) so i tell you what, if i get to 53# and im happy with the tiller, I will leave her right there.

Echatham

takin a couple days off from the build to catch up on my honey do list, in case anyone was wondering. don't worry, I'll get  back on it as soon as the yard and garage are ready for spring!

Echatham

53# @ 28"


3/16 positive tiller, with the left limb being stiffer. don't bother counting holes in the peg board, the rest at the top of the tiller tree isn't exactly level.



so.... what do i do now?!    :dunno:

CardboardDuck

QuoteOriginally posted by Echatham:



so.... what do i do now?!     :dunno:  
Go shoot it silly!!!!!

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