PVC Backed Wooden Bow

Рет қаралды 3,304

Helm Bowman

15 күн бұрын

#archery #bow #diy

Пікірлер: 23

@christophertracey7201 10 күн бұрын

Awesome build

@Helmbowman 10 күн бұрын

Glad you like it, thanks!

@LongBowMan89 13 күн бұрын

Wonderful build my friend 🏹

@Helmbowman 13 күн бұрын

Thanks a lot friend!

@12clr12 12 күн бұрын

Nice Job !

@Helmbowman 12 күн бұрын

Thanks!

@jarchdm 13 күн бұрын

Another excellent build. I liked the Ballsy it's too light let me just cut 18cm off....😮. Does the pvc stay glued on? What epoxy did you use for that?

@Helmbowman 13 күн бұрын

Hahaha thanks bro! Ive used some epoxy from hardware store, its called Bison, it stayed glued on very good, i tested that off-cut pieces try to break it and pvc fail every time, no delaminations

@jarchdm 13 күн бұрын

@@Helmbowman excellent I must try some more pvc glue ups. Haven't had that much success so far. Guess I need to rough it up more.

@Helmbowman 13 күн бұрын

@jarchdm Probably, good luck!

@Helmbowman 13 күн бұрын

Maybe i will try to glue it on belly, basically make like glass laminated bow, but with the pvc strips, they are much less stiff than glass, but they maybe could work well

@jarchdm 13 күн бұрын

@@Helmbowman yep there's a proud tradition of making pvc bows so why not. Or a hybrid with glass on the belly?

@recursr1892 12 күн бұрын

@Helmbowman: Interesting, but a bit confusing- would you mind adding a bit of details on the PVC, may be demonstrating how well it bends before glueing it, sharing also the cross section ? So if this was an uniform material with no direction/grain, then it should have an tensile strength of 3.5MPa to 75MPa- that's a very big range from very weak to average, so it really makes a difference what exact product you are using. As comparison, most average woods are between 50MPa and 100MPa I have seen so far. But I know of PVC only bows, just never seen any chrono measurement, so I don't know if there's may be flavours of PVC around with a good performance. I doubt it a bit, if it's not specially treated. Also the MDF wood layer on top probably cost some performance- why exactly was this added ? Can PVC rip under tear? difficult to believe. However, I liked the bow shape a lot, this is a triangular bow, no ? very elegant curves, probably good performance. best regards

@Helmbowman 12 күн бұрын

Thanks for comment! The MDF layer was just for glue up, it was removed later, it serves as pressure strip to keep PVC backing flat, because sometimes the pressure from rubber bands can bend backing and makes cupping effect… Unfortunately i dont have lot of information on that PVC profile, i get it from hardware store and its just labeled as PVC profile, its 2mm thick, but its really flexible and hard to break… The shape of bow reminds me on Egyptian angular bow or modern hybrid longbow design, that shape was my goal. I need to make heavier draw weight bow to judge its performance comparing to my other bows, but it seems as good performer for 28lbs bow, all in all i think PVC have great potential as bow backing.