Author Topic: Good paddler head scratcher  (Read 1067 times)

scubasteve

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Good paddler head scratcher
« on: June 11, 2019, 10:39:05 PM »
I have a question to the foil board riders or board builders.
I have built a few boards as a project for myself to foil on.
I have a green board that is 7'6" x 32" x 4 3/4"
Which is good to paddle or better to paddle than the grey board,
The grey board is 7'6" x 32" x 5" with i full bevaled rail.
I built the grey board lighter than the green board,
green board 11.5kgs
Grey board 9kgs
Grey board flat bottom
Green slight concave
What am I missing, why would green paddle  heaps better than grey ie: less row/yaw effect
What can I do to make grey paddle better ?
Was thinking of routing a 20mm channel in the bottom towards the front or putting sharp rails on the rear?
Don't know rooky problems....
Please help it's driving me nuts that I can't get a decent paddle speed...
Cheers
Scuba :D
« Last Edit: June 11, 2019, 10:42:53 PM by scubasteve »

peterp

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Re: Good paddler head scratcher
« Reply #1 on: June 11, 2019, 11:34:31 PM »
The reason your grey board has more yaw is due to weight, rails, outline and possibly placement of mast (further forward = more yaw). I see you have fin-boxes in the board, a center fin behind the mast will solve your problems.

exiled

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Re: Good paddler head scratcher
« Reply #2 on: June 12, 2019, 12:22:34 AM »
How low in the water does either board sit?

scubasteve

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Re: Good paddler head scratcher
« Reply #3 on: June 12, 2019, 01:22:50 AM »
Thanks for the replies
Grey sits about 1" out of the water
Green probably the same 1"
The reason that I put the boxes in grey was to reduce the yaw.
Boxes 1" further forward in grey.
The idea was to catch n ride in paddle stance without changing stance.
Have only tried grey in the middle to forward of box.
Was thinking of moving mast to rear of box next time out.
Scuba

PonoBill

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Re: Good paddler head scratcher
« Reply #4 on: June 12, 2019, 08:46:53 AM »
I suspect it's mostly the tail, though the mast position on the Grey looks way forward, and the nose doesn't have the volume placement or the width of the green. I have a similar problem with Little Fugly. It's generally stable and paddles well until I go for a wave, and then the lower volume, narrower nose gets buried unless I fiddle with my stance to keep it up. I can ignore the nose submarining and just go for the wave and be successful most times, but fairly often it just gets too deep and my usual practice of quickly unweighting the front foot to pop up doesn't do much. I have to just stay with it and hope speed will pull the board up. It often does, but I fall a lot more with that board than Mr. Fugly, and the basic yaw characteristics are much harder on my cranky hips. Once I'm in the air, Little Fugly is a joy, but getting there is a bit more work.
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scubasteve

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Re: Good paddler head scratcher
« Reply #5 on: June 12, 2019, 11:26:43 AM »
Thanks for the feed back Bill

I think I might try the foil at the back of the box and also put the fins in.
I had a bigger problem a while ago, that time it was the foil that was angled wrong and was dragging so I shimmed him up and it was better, I may just need more of a shim maybe another 2mm or so.
I will give it ago, this board was a prezzi to myself for turning 50 so it has to work. :o

PonoBill

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Re: Good paddler head scratcher
« Reply #6 on: June 12, 2019, 05:36:20 PM »
If/when you do another I'd consider big rail and tail bevels and maintaining topside width in the nose and tail. You gain the stability of a wide board but it lifts off the water like it was a lot narrower. I want to build my own foilboard, but I have so many projects in flight I'll be 120 before I get to it.
Ponohouse is for sale: http://www.ponohouse.com
Foote 10'4X34", SIC 17.5 V1 hollow and an EPS one in Hood River. Foote 9'0" x 31", L41 8'8", 18' Speedboard, etc. etc.

scubasteve

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Re: Good paddler head scratcher
« Reply #7 on: June 14, 2019, 02:21:22 AM »
Im sure there will be amother build Bill.
Cheers
Scuba