just finished roughing out a new batch of fine for my “shwuz-boards” and a bunch of chandler 5fins I’m still in the process of finishing…
Here’s the question
We had slabs of G12(?) for fins so I made these bases I could insert into the bottom of wood or corecel fin for added support. Obviously they won’t be the same as solid g10 fins from Greg but they’re bamboo. I read Larry and Brians post so I’m not sure if this is necessary but I just wanted some base stiffness if anything.
Any recommendations?
the fins and inserts I roughed today
Closer look at what I’m thinking just worried about foiling the different density material
why I need so many sets of 5 fins
oh ya you can see some other projects/gifts having their lacquer finishes drying in the garage on the clothes line and many more to finish before christmas…
Of course all the ladies in the office, friends(here on sways and elsewhere) and family will need something to store their gifts in…
and other than just being too busy why there’s no available room to work on the dragonboard project right now…There’s a collector’s edition 1958 Austin Healy 3000 being crushed under that mess…
I need some new hobbies…
like maybe just reading or smoking various drugs and drinking beer like the rest of the beach “crew”
aloha
parting gift… for those who just don’t get it here’s a present for you
if you read it and still don’t get it please just give up surfing
Nice sets of fins! You don’t need any base reinforcement if you’re doing the 2.75" long ProBox tab. Plenty strong and stiff at the base when you lay them up and glass them as shown in Larry’s bamboo fin making thread.
It looks like a few sets in the pic have FCS tabs scribed out. They definitely need reinforcement in that case. The small FCS tabs are weak and experience a lot of stress concentrations.
Also I noticed you varied the bamboo lamination grain some fins. Keep an eye on how you template the fin in relation to the laminations. Optimally you want the longest lamination to run from the base of the fin straight out the tip. That will optimize the strength and flex characteristics bamboo naturally provides. Looks like you’ve done that on some of the fins but I’m particularly wary of the carbonized fin in pic #2 where the bamboo laminations run from the middle of the leading edge to the tip. It’s gonna flex weird and possibly break the top 1/3rd off.
Please keep me updated as to how the fins flex (and strength) in that angle compared to angling the lamination along the spine of the fin. My guess is it will be feel soft and not have the power and snappy reaction bamboo fins are known for.
so I guess I was right about having to insert and glass on those G12 bottoms into the bamboo fins.
I got the idea from a post i saw many moons ago from one of the original compsand gurus who showed the same using carbon fiber inserts to fit his home made adjustable FCS plugs. He was an inspiration to alot of us back then like Bert was, too bad he doesn’t post here anymore… Still brings a smile remembering his steel wire brush eps planer discovery back then… bet Paul remembers that one… He’s Paul’s hero…
Yeah about the grain…
Just trying not to waste any of those precious bamboo planks you sent me…
