Perry reflex glue up . . . progress

[Knoll]

Thanks fellas.  The resources avail on this forum are top notch!
Rasped/sanded the backer away.  Process of doing that showed there was bit of a ridge running full length.
Also could see that bond was better at clamp locations, and visibly less good immediately next door.  And 20 clamps exhausts my inventory.   
Second try is now curing.
Made sure core back was flat.  Made sure new backing was flat.  Laid length of tin on top of backing.  Clamped handle area using large surface area clamping blocks with 3 clamps.  Used bicycle tubes to tightly wrap from tips to riser.

Now the hard part . . . . waiting!

Thanks, again.

[bow101]

I use tubes as well, work great and the glue does stick to the rubber.  I have used a long caul, cheap wood like pine 1 x 2.  full width and full length.  I did my very first bow like that and had no issues what so ever with glue lines and it was 5 lams of maple and oak one lam was tapered.

[Springbuck]

  The moisture in the glue caused the wood to cup. I switched to inner tube wraps with maybe some additional clamping in fade areas if needed.

  Beat me.  I switched to always using shims under each clamp OR innertubes.

  Some woods, and hickory can be one, tho I didn't see what the backing was on yours.  Anyway, the glue side gets wet, the woood swells and "cups" side to side, and the edges lift.

  I have a hickory- backed BL recurve sitting in my garage for4 years still, because it shoots so nicely, but the glue lines are so ugly I don't dare give it to anybody.

[Knoll]

Reflex glue-up seems to have been success.  Though was bit disappointed that limbs retained just 1 1/2" of reflex.
Anyway, decided to go for broke.   
Found small piece of hickory laying in the shop. Cut it into rectangular 6 x 1 blocks. Glued them onto the tips. After glue cures will rasp/sand them into static glued-on recurve tips.

[russell]

Looking good - way to persevere! Keep us updated.

[GB]

Looking good, for sure.  I had an odd thing happen with the elm backed erc I made.  Initially it only held half of the reflex I glued in, too.  I'd kept it pretty thick at the fades, and as I tillered it at the handle fades, it gained reflex.  I haven't made enough Perry reflexed bows to tell if that's common to all of 'em or if it's just from the elasticity of erc.  It wound up springing back all the way back to 3 inches.  Maybe you'll have some of that spring back with the wood you're using.

[bubby]

Pre tiller the belly so its basically floor tillered then glue it up and it will work better

[Knoll]

I'd also like to add tip overlays ... something else not yet attempted.  Have hunk of rosewood.  While the "recurve" blocks are now shaped to width profile of limbs, top surface of them are still flat.  Is now the time to add overlays?  Anything to be aware of re gluing rosewood to hickory?

[PatM]

Not sure how well the first set of overlays are going to hold up.
 

[PatM]

Looking good, for sure.  I had an odd thing happen with the elm backed erc I made.  Initially it only held half of the reflex I glued in, too.  I'd kept it pretty thick at the fades, and as I tillered it at the handle fades, it gained reflex.  I haven't made enough Perry reflexed bows to tell if that's common to all of 'em or if it's just from the elasticity of erc.  It wound up springing back all the way back to 3 inches.  Maybe you'll have some of that spring back with the wood you're using.

That's very normal for bows glued up with forced reflex in thicker dimensions.

[Knoll]

If not sure then it's understandable not to be helpful on 2nd  . . . .

[PatM]

If not sure then it's understandable not to be helpful on 2nd  . . . .

Yes..

[mikekeswick]

Also if u wanna use clamps I rip a piece of wood a little narrower than the backing, and cover it with painters tape for a pressure strip

+1
Just get the cheapest, lowest density junk pine eg. soft stuff for bamboo backing as they will bend to the shape of the boo.
Or use inner tubes.

[mikekeswick]

Also do two wraps per limb. One going from handle to tip, then tip back to handle. Making sure that the second wrap is opposite to the first - so the twisting forces even themselves out. If you just wrap one way then you can end up with twisted limbs.

[bubby]

Not sure how well the first set of overlays are going to hold up.



Why is that pat?