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rail shape
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This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.    rodndtube.com's (OLD) MyPaipoBoards Forums. Reading but no posting on the OLD forums. Forum Index -> Paipo Board Design & Building
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flojo



Joined: 06 Jun 2010
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Location: SF BAY AREA

PostPosted: Thu Jun 17, 2010 5:56 pm    Post subject: rail shape Reply with quote

what is a good rail shape for a thin 3/8 inch paipo? how about the thicker shapes?

thanks,
flojo
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Uncle Grumpy



Joined: 15 Jan 2007
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Location: San Clemente

PostPosted: Thu Jun 17, 2010 7:46 pm    Post subject: Reply with quote

All you really need to do is knock off the corners, "ease the edges" a little bit.
An eased square edge works very well on thin rails.
Better then totally rounded IMO.
You can get away with just that, up to about 1" or so from my experience.
My 2
Your mileage may vary.
Cool
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bgreen



Joined: 20 Feb 2004
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Location: Qld. Oz

PostPosted: Fri Jun 18, 2010 3:07 am    Post subject: Reply with quote

Flojo,

Don't even bother rounding. Try a hard rail. If you're not happy with it, take a slight edge off as Uncle G advises.


Bob
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kid



Joined: 11 Jan 2010
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Location: Bells Beach

PostPosted: Fri Jun 18, 2010 4:40 am    Post subject: Reply with quote

I'm with Bob.

Hard edge gives good release and speed! If you bury the rail deeply enough in the turn it will still hold well! Rounded rails will hold the face better, but the control will be gained by sacrificing speed.....and speed rocks!
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flojo



Joined: 06 Jun 2010
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Location: SF BAY AREA

PostPosted: Fri Jun 18, 2010 10:25 am    Post subject: Reply with quote

thanks much for the replies--by "hard" rail do you mean just leaving them square or hard down?

thanks

flojo
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Poobah
Dolphin Glider


Joined: 09 Jan 2004
Posts: 696
Location: California, San Diego

PostPosted: Fri Jun 18, 2010 11:36 am    Post subject: Reply with quote

Materials can dictate design. Yes, you can put a sharp corner on a solid timber board with a penetrating oil finish, but I like to ease the edges if I want to varnish or paint a plywood board.
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Uncle Grumpy



Joined: 15 Jan 2007
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Location: San Clemente

PostPosted: Fri Jun 18, 2010 12:49 pm    Post subject: Reply with quote

By ease I mean just enough that you don't hurt yourself (Splinters!? Shocked Crying or Very sad) and by hard, yes square.
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mrmike



Joined: 06 Sep 2007
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Location: coronado, ca

PostPosted: Fri Jun 18, 2010 6:52 pm    Post subject: Reply with quote

I get good results with diamond shape rail 60 40 % 60% on top 40% on the botton <>

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geoffreylevens



Joined: 18 Nov 2009
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PostPosted: Sat Jun 19, 2010 10:51 am    Post subject: Reply with quote

The thicker the rail, the more effect different shapes will have.
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OG-AZN



Joined: 27 Jul 2009
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Location: Norcal

PostPosted: Sat Jun 19, 2010 4:27 pm    Post subject: Reply with quote

Hey Flojo,
Good to see more paipo riders in the Bay Area. I'd be interested to know how your 3/8" board works for you in the conditions up here. Here's a couple pics of rail shapes I've used on 1/4 to 1/2" ply boards. They all worked well surfing everything from Fort to Pacifica; mostly OB. I'm partial to sharper, "knifey" rail shapes since I ride mostly prone. Good luck.


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handfinished



Joined: 24 May 2010
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Location: Cornwall, UK

PostPosted: Sat Jun 19, 2010 5:41 pm    Post subject: Reply with quote

I prefer a rail much like OG-AZM has shown although I have to admit while its better for turns and tricks its quite a bit slower than my hard edged boards.
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flojo



Joined: 06 Jun 2010
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Location: SF BAY AREA

PostPosted: Sat Jun 19, 2010 5:53 pm    Post subject: Reply with quote

hey og--thanks for the time you took to set up take and post those pics--i really appreciate it. So what works for you is slightly rounded on the bottom of the rail feeding up into a sharp edge--i will try that. I have made 3 boards so far, all very primative all with very rounded rails-time to try something different.

I intend to ride prone--spent the last 40 years standing and kneeling it is time to take it easy and relax---

thanks again

flojo
ps-i am having a blast with this stuff
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bgreen



Joined: 20 Feb 2004
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Location: Qld. Oz

PostPosted: Sun Jun 20, 2010 3:38 pm    Post subject: Reply with quote

Flojo,

You can always start harder then round off and test the difference.

Bob
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surffoils



Joined: 12 May 2007
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Location: Gold Coast, (finally), Australia

PostPosted: Sun Jun 20, 2010 9:32 pm    Post subject: Reply with quote

Picking up on a few things that people have said,
Theres certainly a difference between a sharp and rounded rail with a crisper release coming with a sharper edge.
I dont think theres any suction effect (like on a surfboard rail) when youre talking about rails under 1/2 in thick.
Its hard to get a bouyant rail WITH easy penetration, and vica versa, so rails A ~ D theyre all the standard versions but Id like to try E and F and see if I can combine two usually seperate properties in a rail.


Thanks to the Larry Goddard interview here, Im thinking about trying to blend the benefits of bouyancy of a full rail, with the sharper release and 'sink' that comes with a thin rail and using his Makaha Missile planshape.
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mrmike



Joined: 06 Sep 2007
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Location: coronado, ca

PostPosted: Sun Jun 20, 2010 10:50 pm    Post subject: Reply with quote

bouyancy is much over rated. IF it is not thin and sink I don't want it. the last one I made was 1/4" thick ply with no rails just took the sharp edge off lots of fun and fast and flexey. might snap on a big wave but what the hell I will make another for $10 and 3 hours work Cool

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