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by RalfsB
Thu Jun 13, 2019 5:17 pm
Forum: Kitesurfing
Topic: Xr5 15m lightwind? Or
Replies: 10
Views: 548

Re: Xr5 15m lightwind? Or

There are plenty of wonderful one strut kites out there, they are perfect for light wind, if you want to stay with inflatables.
by RalfsB
Sat Jun 08, 2019 10:45 am
Forum: Hydrofoil
Topic: Wing loading as a metric
Replies: 21
Views: 1084

Re: Wing loading as a metric

It is a lot smaller, so not much influence. And the back wing reduces overall lift, as it pulls a bit down, negative lift usually. 8) Peter Sometimes it is not a lot smaller. When I use the speed wing in the front, the back wing looks about 2/3 the size of the front wing. And regarding the negative...
by RalfsB
Thu Jun 06, 2019 4:30 pm
Forum: Hydrofoil
Topic: Wing loading as a metric
Replies: 21
Views: 1084

Re: Wing loading as a metric

I am not sure if it is correct to calculate for the front wing area only, the back wing also contributes to the total lift of the foil.
by RalfsB
Fri May 31, 2019 12:44 pm
Forum: Kitesurfing
Topic: How to make a wind-kite-board-weight table?
Replies: 13
Views: 647

Re: How to make a wind-kite-board-weight table?

80kg rider, alaia or surfboard
18m foil kite - 8 to 14 kts
12m inflatable - 11 to 22 kts
9m inflatable - 16 to 28 kts
7m inflatable - 20 to 32 kts
by RalfsB
Thu May 30, 2019 11:30 am
Forum: Snow / Land
Topic: HQ kites are a bad joke
Replies: 41
Views: 22139

Re: HQ kites are a bad joke

A few months ago I bought a HQ4 Matrixx 18m, so far it seems to be the best foil kite I ever had (turning speed, depower, safety) for light wind freeriding.
by RalfsB
Mon May 27, 2019 4:03 pm
Forum: Kitesurfing
Topic: Wainmann Punch, Boss, and Big Mama: too close to be practical?
Replies: 10
Views: 566

Re: Wainmann Punch, Boss, and Big Mama: too close to be practical?

I can't speak about specific manufacturers and kites but those sizes you mentioned sound a bit too close. A reasonable rule of thumb is to have the next kite size like 1/4 or 1/3 bigger than the previous kite size. If I had a 12m, one size back would be 8 or 9 m; next size forward would be 16 - 18m....
by RalfsB
Wed May 22, 2019 2:02 pm
Forum: Gear Builders
Topic: vacuum ... or something else
Replies: 13
Views: 794

Re: vacuum ... or something else

I found this technique extremely useful, the "poor man's vacuum" series, as in https://vimeo.com/188255088.
I have been using it for laminating boards and also for some smaller custom parts. I am not sure though how well it would work for wings.
by RalfsB
Tue May 21, 2019 8:18 am
Forum: Kitesurfing
Topic: Negative rocker TT?
Replies: 22
Views: 1303

Re: Negative rocker TT?

May be 2 negative rocker areas then, one at the front and one at the back? To even out the maximum lift distribution. Just a thought. A bit like foil with 2 wings? 8 knots riding? In 2 places it might work but I am not sure about how much drag will be there, especially at low speeds. It is not exac...
by RalfsB
Wed May 15, 2019 2:25 pm
Forum: Kitesurfing
Topic: Negative rocker TT?
Replies: 22
Views: 1303

Re: Negative rocker TT?

TT already requires uneven foot pressure, more pressure on the back foot than on the front foot. If you do negative rocker, even more back foot pressure will be needed to compensate for the lift in that part. Sounds like uncomfortable riding.
by RalfsB
Tue Apr 02, 2019 7:50 am
Forum: Foil Kites
Topic: Something new from HQ Kites.
Replies: 10
Views: 1657

Re: Something new from HQ Kites.

But to compare 18m Matrixx by its turning speed to a 18m inflatable does not make much sense. In reality not even 15m Matrixx turns as fast as decent big LEI, hardly 12m Matrixx either. There is many 9m foil kites which turn slower than 17m LEI. I mean, I did not test Matrixx side by side with an 1...

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