New board

What works and what doesn't. Share design ideas, references and contacts for paipo board builders.
User avatar
bgreen
Big Wave Charger
Posts: 1062
Joined: Fri Aug 19, 2011 5:17 pm
City: Brisbane
State or Province: Qld
Country: Oz
Contact:

New board

Unread post by bgreen » Fri Jan 03, 2020 7:21 pm

The latest board - intended to replicate board 7. I only had one wave in a very crowded surf and it went pretty well.
MM9_bottom.jpg
MM9_foil2.jpg
MM9_foil.jpg
MM9_tail.jpg
The reason I got this one, was an airline luggage cart ran over my previous two boards.

belly rider
Big Wave Charger
Posts: 96
Joined: Thu Jul 31, 2014 5:33 pm
City: Florence
State or Province: Tuscany
Country: Italy
Interests: A True Passion for Paipo & Kneeboards
Location: Italy

Re: New board

Unread post by belly rider » Thu Jan 09, 2020 9:07 am

Darn airlines I hate the way they handle our luggage despite it being a surfboard or a suitcase
its all about the ride

User avatar
bgreen
Big Wave Charger
Posts: 1062
Joined: Fri Aug 19, 2011 5:17 pm
City: Brisbane
State or Province: Qld
Country: Oz
Contact:

Re: New board

Unread post by bgreen » Fri Jan 10, 2020 3:38 pm

Sort of fortunately I saw this happen - I was on the bus moving between terminals when I saw my boards fall off the luggage trolley and go under the wheel of the cart. If I hadn't seen it I would have got to the destination and gone - what the %$&* happened to my boards.

The airline were good about promptly refunding me for damages.

User avatar
nomastomas
Big Wave Charger
Posts: 519
Joined: Thu Nov 17, 2011 2:30 am
City: Ojai
State or Province: CA
Country: USA
Interests: Surfing, cycling and fishing
Location: Ojai, CA
Contact:

Re: New board

Unread post by nomastomas » Tue Jan 14, 2020 1:33 pm

Nice! What are the dims? What size fins do you plan to run?
"This is a paipo site...isn't it?"
www.tp4surf.com

User avatar
bgreen
Big Wave Charger
Posts: 1062
Joined: Fri Aug 19, 2011 5:17 pm
City: Brisbane
State or Province: Qld
Country: Oz
Contact:

Re: New board

Unread post by bgreen » Wed Jan 15, 2020 4:36 am

Dimensions are similar to other boards: 54 x 21 x 1 7/8".

So far it's been ridden finless, which I'll probably stick to. I'm not entirely sure that it is suited to fins. The couple of times I rode the previous version with fins, they didn't seem to interact well with the wings. I'd talked to the shaper about trialling a different location/angle for the plugs, but I think they are in the same location as the last board. I said I wanted a duplicate and that's probably what I got.

The previous board has been well tested at Jbay and at smallish Cloudbreak, amongst other places - without fins.

When it comes to fins, I typically don't use much over 3.5 "

User avatar
nomastomas
Big Wave Charger
Posts: 519
Joined: Thu Nov 17, 2011 2:30 am
City: Ojai
State or Province: CA
Country: USA
Interests: Surfing, cycling and fishing
Location: Ojai, CA
Contact:

Re: New board

Unread post by nomastomas » Wed Jan 15, 2020 11:45 am

The bottom of your board is very similar to how I shape the T-Bellys. What you refer to as "wings" are essentially the sides of what I call "exit concaves". That curved surface presents quite a challenge for mounting fins. The problem is, if the fin-box (or plug) is installed flush with the surface, it produces negative fin cant, with the fin tip leaning towards the centerline instead of away from the centerline. Negative cant reduces the effectiveness of the fin when the board is rotated on its axis to turn. (my guess is that it also produces unwanted drag) Tail V will compensate a little for this, but I've learned to compensate even further by using FCS Fusion boxes, which an be ordered in three different cants; 0*, 5* or 9*. On a twin-fin, I use the 9* boxes. On a quad, I use 5* boxes in front where the concave is more shallow, and 9* for the rear, where the concave is deeper. The other "trick" I use is to shape a little flat spot (flat, as in parallel to the stringer) where the box will be installed. This also makes it easier for my glasser to use the fin box jig when installing the boxes.

The other problem I see is that you need to use larger/deeper fins, especially in larger/steeper waves if you want the full "finned" effect. But, if your fin plugs are not parallel to the centerline, larger fins will make things worse, i.e. create more unwanted drag. Below is a tutorial on fin cant as I understand it.
Fin Cant Angle.pdf
(101.17 KiB) Downloaded 12 times
"This is a paipo site...isn't it?"
www.tp4surf.com

User avatar
bgreen
Big Wave Charger
Posts: 1062
Joined: Fri Aug 19, 2011 5:17 pm
City: Brisbane
State or Province: Qld
Country: Oz
Contact:

Re: New board

Unread post by bgreen » Wed Jan 15, 2020 3:33 pm

I'll see what Chris says about altering fin cant. I know there isn't much thickness in the boards.

Regarding the utility off fins. I've never had any problems in steep/hollow waves. The two instances where I recall the tail noticeably losing grip, but not totally, was when doing a bottom turn and going fast and the wave suddenly became full. Yesterday there was a bit of whitewater to turn around as well. The result was momentary loss of speed. A very infrequent experience I can live with and outweighed by the fun of going finless.

User avatar
nomastomas
Big Wave Charger
Posts: 519
Joined: Thu Nov 17, 2011 2:30 am
City: Ojai
State or Province: CA
Country: USA
Interests: Surfing, cycling and fishing
Location: Ojai, CA
Contact:

Re: New board

Unread post by nomastomas » Wed Jan 15, 2020 4:45 pm

"Regarding the utility of fins..." just depends on where you want to surf on the wave. Finless boards take different lines than finned boards, but either line can be "fun".
"This is a paipo site...isn't it?"
www.tp4surf.com

User avatar
bgreen
Big Wave Charger
Posts: 1062
Joined: Fri Aug 19, 2011 5:17 pm
City: Brisbane
State or Province: Qld
Country: Oz
Contact:

Re: New board

Unread post by bgreen » Thu Jan 16, 2020 6:00 am

Jeff Quam had something to say about following the line of the wave.


I have also ridden this board extensively, predominately finned, but it rides fine finless. It has a more traditional BB bottom.
MM4_bottom.jpg
MM4_bottom.jpg (85.46 KiB) Viewed 288 times

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest