BBH twins build along (For testing).

[superdav95]

Here’s the bow out of the glue up and wrap.  I hit it with the belt sander to save time and then to the rasp.  Glue lines are good!   About 5” reflex.  We shall see what I end up keeping when I start tillering.  More to come. 

[simk]

That is looking good Dave!
The problem I always had with the inner tubes is that the glue sticks to the tubes making it hard to remove and often damages them when removing. I often could use them only once therefore. Don't they? I therefore bought silicone rubber bands which dont stick with the 2k - this worked much better. But since I'm glueing my bows with white pva carpenters glue this anyways isnt a topic anymore.
Wonder how much of that reflex you are going to save....the heat treating sure will help you a lot!
Best of luck!
Cheers

[bjrogg]

looking good so far Dave. I'm watching when I can.

Thanks for posting this. A boo backed bow is on my list.

bjrogg

[superdav95]

That is looking good Dave!
The problem I always had with the inner tubes is that the glue sticks to the tubes making it hard to remove and often damages them when removing. I often could use them only once therefore. Don't they? I therefore bought silicone rubber bands which dont stick with the 2k - this worked much better. But since I'm glueing my bows with white pva carpenters glue this anyways isnt a topic anymore.
Wonder how much of that reflex you are going to save....the heat treating sure will help you a lot!
Best of luck!
Cheers

Thanks Simon.  Ya it’s an issue with the glue sticking to the inner tubes.  I usually get 4-5 bow glue ups with each set.  Ever since I started wrapping with cling wrap just prior to wrapping with inner tubes.  This saves the tubes in large part to get more uses out of them.   The reflex I’m hoping will retain at least 3-4” of it.  These 2 bows are slightly different from each other so there may be some variations in reflex retention too.  The secret to retain more of this reflex is more to do with the reflex induced with the heat treatment more then the Perry reflex part of this build.  We shall see what happens.  Thanks again for watching and following along. 

[superdav95]

looking good so far Dave. I'm watching when I can.

Thanks for posting this. A boo backed bow is on my list.

bjrogg

Thanks BJ.  I recommend trying one. 

[Del the cat]

Watching with interest 
Del

[Selfbowman]

I tape my bamboo as you did . Tape with strap tape as you did then wrap in plastic wrap to keep glue off fire hose or inner tubes.

[superdav95]

Did a little more work on both of these bows.  As mentioned earlier they will have similar dimensions but will vary slightly. I haven’t decided quite yet how many variables I want to include between these two bows.  Too many will make it difficult to determine what made the difference in performance if any difference at all.  I admit that it’s not terribly scientific but we are dealing with wood after all.  I have thrown in 3 known variables so far.  1. Limbs width.  2. Boo strip thickness.  3. Darkness of belly wood.  This last one was varied by flattening more of the back of the hickory blank in prep for boo strip glue up.  Taking down more from the back of the blank allowed me to keep more of the toast compared to the second one.  I’m debating on a 4th variable of bow length.  The first one is 68” while the second is 69”.    Today I got both tillered to about 15” with long string on my inverted tiller device.  This allows me to scrape and pull without removing the bow.   I’ll take it to the wall tiller set tomorrow for getting to around 27” at 50lbs.  My goal for these is 48-50lbs at 28”.  We shall see.  The bend so far on both looks good.  More to come. 

[superdav95]

Got one of these tillered to low brace.  Bow bend looks good to my eye.  It’s at 50lbs at brace so I have plenty of weight to remove yet at full draw.  I’ll work on the other one tomorrow and get them both to brace and go from there. 

[Bob Barnes]

those are very nice and look fast just sitting there... I'll bet they do well in the testing.  Congrats!   

[superdav95]

Thanks Bob.  I’m hoping they will be. 

[DPGladius]

Great information! And nice looking bows. I will have to try the inner tube wrap on my lamination projects. I can never seem to get enough claps at the correct positions.
David

[Will B]

Very nice work, Dave. Very helpful information.

[Selfbowman]

Strung profile looks great. Should be very fast.

[superdav95]

Thanks guys.  Fingers crossed.