G10 Fins

29 posts / 0 new
Last post
grasshopper's picture
Offline
Last seen: 3 hours 41 min ago
Joined: 03/18/2004

G10 Fins

#1 Back to Top

After drooling over GregGriffin's g10 fins,I decided to order a sheet to make some fins for myself.  No wonder his fins are so sweet - a blind monkey could foil this stuff sharp enough to fillet a fish!  Seriously you should try some for your next board - it seems kind of pricey but you can get a 12"x24" 1/4" sheet for about $60 and that will net 3 sets of fins so for the price of one set of fiberglass fins from the surf shop - you can have three that you made yourself!  Just google g10 frp4 fiberglass sheets.  After doing some wooden fins and some fiberglass fins from panels I layed up myself from 6oz, this g10 was really a treat to foil!


Here's a couple tips I used for these:


Get the grit blade for your jigsaw to cut this stuff out - i got one from greenlight for like 5 bucks!


After cutting out the fin template, tape up the flat sides of the fins and spray over the tape with adhesive then stick the fins together and foil.  The tape will show a centerline to work towards and it will make unsticking the fins easier and you will not have to sand the flat side to get any adhesive off - just peel off the tape.  This method helps to keep your fins symetrical.


 


keel fin


g10 keel fin


keelfin foil


keel fin fish

Probox-Larry's picture
Offline
Last seen: 2 weeks 4 days ago
Joined: 05/24/2007

Re: [grasshopper] G10 Fins

Back to Top

Nice Job grasshopper,


Just did these G-10 Kiteboard fins for ProBox. This one is the Ninja Kite Quad, 8" front fins with 6" back fins.


Mahalo,Larry


www.ProBox-Larry.Blogspot.com


 

Probox-Larry's picture
Offline
Last seen: 2 weeks 4 days ago
Joined: 05/24/2007

Re: [grasshopper] G10 Fins

Back to Top

Here's another Kiteboard set-up called the Synergy Kite Quads.


 


 

afoaf's picture
Offline
Last seen: 1 week 5 hours ago
Joined: 12/19/2007

Re: [Probox-Larry] G10 Fins

Back to Top

For the sake of humanity...get together with Greg, please.

YOU ARE LEAVING MONEY ON THE TABLE.

grasshopper's picture
Offline
Last seen: 3 hours 41 min ago
Joined: 03/18/2004

Re: [grasshopper] G10 Fins

Back to Top

those are some crazy fins!  they must be for racing kiteboards?  Do you have to putt extra reinforcements to keep those boxes from pulling out with such a long fin? are they 1/4" all the way through or do you have thicker stock and grind down for the base tab?

oneula's picture
Offline
Last seen: 9 hours 7 min ago
Joined: 06/10/2004

Re: [grasshopper] G10 Fins

Back to Top

what did you think of the smell?


pretty unique isn't it?


wondering if its toxic..

a minimum of 120 degrees of motion in 6 weeks and I'll be back
surfthis's picture
Offline
Last seen: 2 weeks 9 hours ago
Joined: 03/18/2004

Re: [grasshopper] G10 Fins

Back to Top

"what did you think of the smell?


pretty unique isn't it?


wondering if its toxic.."


 


I'd wager that it isn't good for you! I love the way the stuff foils, you can see each individual layer way better than I thought you would. Grasshopper's absolutely right about the grit saw, only way to fly. I burned up two or three metal cutting blades before I made the switch. Making tight bends with the metal blades would make the G10 turn black and start smoking, now talk about toxic! That shit's nasty!!!

Swied's picture
Offline
Last seen: 1 week 4 days ago
Joined: 11/22/2006

Re: [grasshopper] G10 Fins

Back to Top


grasshopper wrote:


After cutting out the fin template, tape up the flat sides of the fins and spray over the tape with adhesive then stick the fins together and foil.  The tape will show a centerline to work towards and it will make unsticking the fins easier and you will not have to sand the flat side to get any adhesive off - just peel off the tape.  This method helps to keep your fins symetrical.



 


I sprayed Super 77 directly on the G10 and it was a little challenging to get the goop off afterwards.  Putting tape on the fins before spraying is a good tip.


It did smell a little funky.  I definitly recommend wearing a good respirator.  Sanding G10 is super dusty.

bartt's picture
Offline
Last seen: 2 years 8 months ago
Joined: 11/14/2007

Re: [grasshopper] G10 Fins

Back to Top

I typically use the double sided carpet tape to hold 2 sheets together for cutting and shaping.HD has that tape for pretty cheap.

HTH..

synergytodd's picture
Offline
Last seen: 2 years 7 months ago
Joined: 03/24/2008

Re: [Probox-Larry] G10 Fins

Back to Top

Probox-Larry wrote:

Here's another Kiteboard set-up called the Synergy Kite Quads.



Hey Larry!

Thanks again for translating my template into a kiteboard fin! It was an unexpected treat!

I never thought I would have my own kiteboard fin.

Now...how do those things work? LOL

Probox-Larry's picture
Offline
Last seen: 2 weeks 4 days ago
Joined: 05/24/2007

Re: [grasshopper] G10 Fins

Back to Top


grasshopper wrote:


those are some crazy fins!  they must be for racing kiteboards?  Do you have to putt extra reinforcements to keep those boxes from pulling out with such a long fin? are they 1/4" all the way through or do you have thicker stock and grind down for the base tab?



 


Yes grasshopper, The racing kiteboard ProBox area was reinforced with carbon inlay into high density foam. I cut the tab to full length inside the box to transfer some of the base load up. I got .312 thickness and milled to .251, G-10 varies in thickness so stock .250 isn't that most of the time, it's a few thousand thinner. These fins have no tip flex. Double foil on all 4 fins with the leading edge foil pulled back about 40 percent for speed.


Mahalo,Larry


www.ProBox-Larry.Blogspot.com

otis's picture
Offline
Last seen: 2 months 3 weeks ago
Joined: 09/10/2005

Re: [grasshopper] G10 Fins

Back to Top

Any preferred sites for getting g10 sheets?

surfthis's picture
Offline
Last seen: 2 weeks 9 hours ago
Joined: 03/18/2004

Re: [grasshopper] G10 Fins

Back to Top

Otis, the answer is in your signature.

I ordered from these guys:

http://accurateplastics.thomasnet.com/viewitems/panels/epoxyglas-sup-tm-...

Google also turned up these guys:

http://www.americanepoxy.com/g10fr4sheets.html

GregTate's picture
Offline
Last seen: 1 day 12 hours ago
Joined: 03/18/2004

Re: [grasshopper] G10 Fins

Back to Top

For the love of god, don't do it.

(OK, I'm studying your post, and liking it.  I hope I don't order  sheet of G10. Pray for me.)

Journalism is Dead

otis's picture
Offline
Last seen: 2 months 3 weeks ago
Joined: 09/10/2005

Re: [surfthis] G10 Fins

Back to Top

surfthis wrote:

Otis, the answer is in your signature.

I ordered from these guys:

http://accurateplastics.thomasnet.com/viewitems/panels/epoxyglas-sup-tm-...

Google also turned up these guys:

http://www.americanepoxy.com/g10fr4sheets.html


THE REASON:

yeah, well, I ldid look and  found that issues of thickness and color were limited by site.

You have listed one site that addresses thickness and size of panel exceptionally well,  but doenst address color except their amber or natural color.

Your other site offers two colors : black and green.

Maybe, I'm wrong but doesnt anyone offer this in a variety of colors also?

Not wishing to repeat a possible 1-2+ hour search, only to find out that there are only 2-3 colors, I thought I'd ask.

Seems Griffin makes his fins in a variety of colors.

chrisp's picture
Offline
Last seen: 2 days 23 hours ago
Joined: 05/30/2006

Re: [grasshopper] G10 Fins

Back to Top

i'm pretty sure the griffin fins that you've seen that were colored were regular glass panels.


his 'g10' fins are all that beige-green color

You are all singing, all dancing crap of the world.

surfthis's picture
Offline
Last seen: 2 weeks 9 hours ago
Joined: 03/18/2004

Re: [Otis] G10 Fins

Back to Top

Otis wrote:

surfthis wrote:

Otis, the answer is in your signature.

I ordered from these guys:

http://accurateplastics.thomasnet.com/viewitems/panels/epoxyglas-sup-tm-...

Google also turned up these guys:

http://www.americanepoxy.com/g10fr4sheets.html


THE REASON:

yeah, well, I ldid look and  found that issues of thickness and color were limited by site.

You have listed one site that addresses thickness and size of panel exceptionally well,  but doenst address color except their amber or natural color.

Your other site offers two colors : black and green.

Maybe, I'm wrong but doesnt anyone offer this in a variety of colors also?

Not wishing to repeat a possible 1-2+ hour search, only to find out that there are only 2-3 colors, I thought I'd ask.

Seems Griffin makes his fins in a variety of colors.

Didn't mean anything in particular reminding of your signature, just saw some irony in it and followed up with a weak attempt at humor.

There's only two colors that I've found, sort of choice between piss yellow, and pee green. I didn't see the black panel on either site I linked to,  but that would be a great option over the funky color I got. 

If you use a fin system, then you'll want something close to 1/4" thickness. That's what I used, and it fits right in the FCS slots, therefore, I assume since FCS fits in Probox, that 1/4" would work in that system as well. Lokbox used to sell adapters for FCS, so maybe that would be the thickness for that system as well??

surfthis's picture
Offline
Last seen: 2 weeks 9 hours ago
Joined: 03/18/2004

Re: [grasshopper] G10 Fins

Back to Top

http://www.americanepoxy.com/g10fr4sheets.html

Thanks for pointing out the black option Otis! I looked right at that site and didn't really pay any attention to it.

grasshopper's picture
Offline
Last seen: 3 hours 41 min ago
Joined: 03/18/2004

Re: [grasshopper] G10 Fins

Back to Top

i ordered from: http://k-mac-plastics.com/g10-fr4-sheets.htm


they seemed to have the best prices


i wore a mask so i didnt notice the smell - just noticed that they foiled out ridiculously smooooooooth


i rode this board last week and it is FAST - fins feel good - cant wait to draw up a few templates to foil out and compare!

Swied's picture
Offline
Last seen: 1 week 4 days ago
Joined: 11/22/2006

Re: [grasshopper] G10 Fins

Back to Top


grasshopper wrote:


i ordered from: http://k-mac-plastics.com/g10-fr4-sheets.htm


they seemed to have the best prices


i wore a mask so i didnt notice the smell - just noticed that they foiled out ridiculously smooooooooth


i rode this board last week and it is FAST - fins feel good - cant wait to draw up a few templates to foil out and compare!



I just put the price list into Excel, so that I could compare to Ridout Plastics prices.  Ridout Plastics, in San Diego, quotes their prices in $/pound.  I did a Google search and found a site that said G10 was 119 pounds per cubic foot.  Doing the calculations shows that k-mac-plastics is charging about $10.30 per pound for normal green G10.  The black stuff is almost double the price.  It has been a while since I was there last, but I think that Ridout's prices were about the same (if not less).  If you are in SD, and don't want to pay for shipping, then you might want to stop by Ridout.

afoaf's picture
Offline
Last seen: 1 week 5 hours ago
Joined: 12/19/2007

Re: [grasshopper] G10 Fins

Back to Top

Grasshopper, sell me those keels!

chrisp's picture
Offline
Last seen: 2 days 23 hours ago
Joined: 05/30/2006

Re: [grasshopper] G10 Fins

Back to Top

thanks for the info everybody...


Grasshopper, your blog is sweet!

You are all singing, all dancing crap of the world.

Bud
Bud's picture
Offline
Last seen: 3 weeks 1 hour ago
Joined: 02/09/2005

Re: [GregTate] G10 Fins

Back to Top

GregTate wrote:

For the love of god, don't do it.

(OK, I'm studying your post, and liking it.  I hope I don't order  sheet of G10. Pray for me.)

Me too, GregTate .... but let's say... HYPOTHETICALLY if some backyard hack was to take on a new project ... will someone who knows tell if -

- one should go with .313 thickness to insure sufficient material for a 1/4" tab?

- maybe this stuff could be .... clamped, heated and bent at the tab for built-in cant?

"let's see that fugly brown water logged 4" thick monsta wide poop stained board ur fat @** farts on while surfing." - shapaholic2011

grenade's picture
Offline
Last seen: 4 years 11 months ago
Joined: 08/23/2009

Re: [grasshopper] G10 Fins

Back to Top

or why not shape fin and tab seprate add the cant to the top of the fin and glue it together. G10 is tough this may almost create a breakaway if you nail something hard

grasshopper's picture
Offline
Last seen: 3 hours 41 min ago
Joined: 03/18/2004

Re: [grasshopper] G10 Fins

Back to Top

1/4" fits tight in the proboxes


If you needed to build cant into the fin, i think the best way would be to build a layup surface with an angle on the edge. and layup your own fin panel.  I have thought also about building the tab and fin speerate and attaching them with the desired angle but this would probably prove to be more difficult than you think to get it right.


No need to buy mine - build your own - they will be mo betta!


I will hopefully have some sweet pics of an obx dream session courtesy of hurricane bill to put up on the blog soon!

lavarat's picture
Offline
Last seen: 3 days 22 hours ago
Joined: 03/03/2006

Re: [grasshopper] G10 Fins

Back to Top

G10 is the bomb for clean foiling! It goes a bit slower but that is a good thing for a hack like me. Wood is way harder for me to get strait.

The easy way to add cant is to go Probox or sand down one side of the fin tab and add tape to the other side.

[img_assist|nid=1045618|title=G10 fin with cant|desc=|link=none|align=left|width=75|height=100]

I have done it the for real hard way too,sand down your tab and put tape or release agent inside the fin box.Then tape your fin in at the proper cant and add resin +glasspowder-filler.Pull it out just after the resin  sets up.

<p>Ian</p>

NuclearFishin's picture
Offline
Last seen: 1 year 9 months ago
Joined: 11/04/2006

Re: [grasshopper] G10 Fins

Back to Top

grasshopper wrote:

keel fin fish

I really like the fin template on that cute fish. Where did you get it from , is it the Greenlight one ?

Neato blog too btw.

grasshopper's picture
Offline
Last seen: 3 hours 41 min ago
Joined: 03/18/2004

Re: [grasshopper] G10 Fins

Back to Top

The template for these fins was drawn freehand after checking out all the different fins on offer at rainbow fins and true ames - heavily influenced by the Pavel Keel Haulers.  I marked out a few reference points (base length, height, and rake) and went to town drawings a couple different curves and using the one I liked best.

chrisp's picture
Offline
Last seen: 2 days 23 hours ago
Joined: 05/30/2006

Re: [grasshopper] G10 Fins

Back to Top

has anyone tried foiling the black stuff?


can you see the foil lines like in the green stuff?


these guys offer several different colors:


http://www.halperntitanium.com/products.htm

You are all singing, all dancing crap of the world.