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by RalfsB
Mon Apr 10, 2017 2:10 pm
Forum: Kitesurfing
Topic: Dying after board start
Replies: 14
Views: 879

Re: Dying after board start

Make sure your kite is big enough for the wind you are kiting in. If you are using a kite too small, it is very hard to get it up to speed. Also I know some learners who have benefited from this waterstart technique: when putting your board on keep your kite low (like 10 o'clock), then start by quic...
by RalfsB
Tue Mar 28, 2017 7:27 am
Forum: Kitesurfing
Topic: You love it - SUP and kite shop in Dusseldorf - Do not buy!
Replies: 11
Views: 1987

Re: You love it - SUP and kite shop in Dusseldorf - Do not buy!

I bought a kite from them few years ago. Did not have any problems.
by RalfsB
Wed Mar 22, 2017 2:15 pm
Forum: Hydrofoil Builders
Topic: Building HF-board; as light as possible, what construction?
Replies: 4
Views: 605

Re: Building HF-board; as light as possible, what construction?

I am in the process of making a board of similar dimensions (125x46cm) but mine is thicker(4.5cm). Made it from XPS foam, the bottom has 200g carbon and 110g glass, a bit more around the foil box, the top has 200g carbon + 110g glass plus the deck area has additional 200g carbon plus the foil box ar...
by RalfsB
Mon Feb 20, 2017 3:41 pm
Forum: Hydrofoil Builders
Topic: Bomb proof board from XPs insulation foam
Replies: 65
Views: 4642

Re: Bomb proof board from XPs insulation foam

The board weighs in currently (with a fill coat on the bottom weave and rails) 1.8 kg I now need to glass the top with rail wraps down to bottom curve. Am thinking of 2x 6onz with a 4onz patch over mast mount. I feel that I have perhaps over built it but it is the first time I have used this foam a...
by RalfsB
Mon Feb 20, 2017 8:26 am
Forum: Hydrofoil Builders
Topic: Bomb proof board from XPs insulation foam
Replies: 65
Views: 4642

Re: Bomb proof board from XPs insulation foam

What is the weight of the board after glassing?
by RalfsB
Wed Feb 01, 2017 11:57 am
Forum: Hydrofoil Builders
Topic: Bomb proof board from XPs insulation foam
Replies: 65
Views: 4642

Re: Bomb proof board from XPs insulation foam

Woodie Cookie in the Netherlands, an ex-raceboard champ, board designer and now foil designer, has made some hollow raceboards. Can anyone think of a good reason why hollow boards wouldn't work for foils? Hollow boards do work for foils, I know that a local company Stradi Custom Boards built a batc...
by RalfsB
Thu Jan 12, 2017 8:12 am
Forum: Hydrofoil Builders
Topic: Bomb proof board from XPs insulation foam
Replies: 65
Views: 4642

Re: Bomb proof board from XPs insulation foam

Last winter I built my bombproof foilboard using the xps core (2 cm thick) and 3mm plywood on both sides plus wooden reinforcements inside. Works fine but is quite heavy.
foil-in-making.png
by RalfsB
Tue Jan 10, 2017 10:16 am
Forum: Kitesurfing
Topic: Line extensions, brands, lengths?
Replies: 5
Views: 668

Re: Line extensions, brands, lengths?

For light winds I am using 15m extensions on my 18m kite, that makes a significant difference.
by RalfsB
Mon Jan 09, 2017 11:19 am
Forum: Kitesurfing
Topic: Sector 60
Replies: 11
Views: 1147

Re: Sector 60

On Sector 54 I have M6 screws (6mm metric), thread length 20mm, screw head diameter 10mm (heads are the ones with the Phillips round-pan / mushroom shape), can't see the washer.
by RalfsB
Mon Jan 02, 2017 8:00 pm
Forum: Board Builders
Topic: Hydrofoil board layup
Replies: 16
Views: 1719

Re: Hydrofoil board layup

You may want to re-consider your core material. A closed cell pvc foam should virtually eliminate water uptake even if you do ding the skin. Useful for both rails and also the bolt through for the foil mount. To toughen up the rails you can just add a few layers of fiberglass tape. Either just plai...

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