Inverse Rail Board

What works and what doesn't. Share design ideas, references and contacts for paipo board builders.
CHRISPI
Big Wave Charger
Posts: 301
Joined: Sun Dec 28, 2014 2:48 pm
City: Durban
State or Province: Natals
Country: South Africa

Inverse Rail Board

Unread post by CHRISPI » Sun Mar 04, 2018 9:31 am

The idea is to have the thinnest rails with bouncy. Obviously the rail will be fragile being so thin
Attachments
GOPR2501 (2).JPG
Deck been glassed
GOPR2504 (2).JPG
GOPR2502.JPG

jbw4600
Big Wave Charger
Posts: 289
Joined: Sat Nov 05, 2011 6:08 pm
City: Kentfield
State or Province: CA
Country: USA
Location: Fairfax, CA
Contact:

Re: Inverse Rail Board

Unread post by jbw4600 » Sun Mar 04, 2018 1:59 pm

Very interesting! I look forward to hearing your ride reports.

User avatar
krusher74
Big Wave Charger
Posts: 790
Joined: Wed Nov 07, 2012 3:53 pm
City: easkey
State or Province: co sligo
Country: Ireland
Interests: Surfing, vintage cars and motorbikes
Location: Easky, Co sligo , ireland
Contact:

Re: Inverse Rail Board

Unread post by krusher74 » Sun Mar 04, 2018 7:41 pm

So complex it boggles my mind! :o

I think i could only make sense of it by riding one. :D

Would be interesting the see some fluid dynamics modeling done on your designs.

CHRISPI
Big Wave Charger
Posts: 301
Joined: Sun Dec 28, 2014 2:48 pm
City: Durban
State or Province: Natals
Country: South Africa

Re: Inverse Rail Board

Unread post by CHRISPI » Thu Mar 08, 2018 10:44 am

I guess the idea is to focus the water flow, to get better lift at lower speed. It is ultimately no faster at top end but you get there faster, like a car with lots of toque
Attachments
GOPR2518.JPG
GOPR2514.JPG
GOPR2515.JPG
GOPR2511.JPG
GOPR2510.JPG

CHRISPI
Big Wave Charger
Posts: 301
Joined: Sun Dec 28, 2014 2:48 pm
City: Durban
State or Province: Natals
Country: South Africa

Re: Inverse Rail Board

Unread post by CHRISPI » Thu Mar 08, 2018 3:21 pm

Torque

GeoffreyLevens
Big Wave Charger
Posts: 362
Joined: Sat Sep 17, 2011 9:58 am
City: Paonia
State or Province: Colorado
Country: USA
Location: Paonia, Colorado
Contact:

Re: Inverse Rail Board

Unread post by GeoffreyLevens » Fri Mar 09, 2018 10:34 am

I'm thinking a couple extra layers of 4 oz. glass on deck side towards the rails in back (compression of glass in turns) might be beneficial both for longevity and also for more snappy flex of the "wings"

CHRISPI
Big Wave Charger
Posts: 301
Joined: Sun Dec 28, 2014 2:48 pm
City: Durban
State or Province: Natals
Country: South Africa

Re: Inverse Rail Board

Unread post by CHRISPI » Sat Mar 10, 2018 3:57 am

I only use 6 oz now and has 3 m of cloth in it, 5 layers on the inside of the rails it’s strong with some flex hoping to teats on Sunday. Always exciting riding a new design for the first time! The last board set very high standards

GeoffreyLevens
Big Wave Charger
Posts: 362
Joined: Sat Sep 17, 2011 9:58 am
City: Paonia
State or Province: Colorado
Country: USA
Location: Paonia, Colorado
Contact:

Re: Inverse Rail Board

Unread post by GeoffreyLevens » Sat Mar 10, 2018 10:37 am

My eyes certainly like the look of it! Looking forward to a ride report.

CHRISPI
Big Wave Charger
Posts: 301
Joined: Sun Dec 28, 2014 2:48 pm
City: Durban
State or Province: Natals
Country: South Africa

Re: Inverse Rail Board

Unread post by CHRISPI » Mon Mar 12, 2018 4:36 am

First test on Sunday 1.3 m @ 13 sec onshore winds with blue bottles ,set waves closing out .It rode the inside mush well getting on top off and making even the teeniest waves great fun.unfortunatly all the bigger pitching faces ended in spectacular nose dives it seems to jump out of the wave face . It will take some more testing to understand .The sharp rails hurt my fingers when carrying it normal under arm.

CHRISPI
Big Wave Charger
Posts: 301
Joined: Sun Dec 28, 2014 2:48 pm
City: Durban
State or Province: Natals
Country: South Africa

Re: Inverse Rail Board

Unread post by CHRISPI » Tue Mar 13, 2018 11:23 am

The other problem is I am finding bruises and tender spots that I never got with other boards.

User avatar
bgreen
Big Wave Charger
Posts: 1078
Joined: Fri Aug 19, 2011 5:17 pm
City: Brisbane
State or Province: Qld
Country: Oz
Contact:

Re: Inverse Rail Board

Unread post by bgreen » Thu Mar 15, 2018 7:30 am

Sounds like it is going to take some time to work out how to ride it in hollow waves or you have a mush rider.

CHRISPI
Big Wave Charger
Posts: 301
Joined: Sun Dec 28, 2014 2:48 pm
City: Durban
State or Province: Natals
Country: South Africa

Re: Inverse Rail Board

Unread post by CHRISPI » Fri Mar 16, 2018 8:35 am

Second test completed , the 1 in keel that I thought was going make the board run straight as an arrow, I found as it gets up on a rail in the wave face there is a transition faze were the out ward wash pushes the keel and yaws the board sideways. The idea off focusing water flow clearly works but not in the way I thought .The beast feature is how easily it gets on the plain even on the smallest waves , also great when past the yaw faze in the vertical zone on the rail tips it fly’s .This is going to be a good board.

Post Reply

Who is online

Users browsing this forum: No registered users and 6 guests