tänkte bara en gång för alla….

[anonym-anvandare]

naish storlekar är den riktiga storleken på hela kiten (tex när den ligger platt på backen) wippi när den är i luften om man ser den underifrån (projekt. area)

[mons]

aha… fan va korat! troode det var ngt i stil med seglingsyta, att den var mindre än själva totalytan… men inte då.

[anonym-anvandare]

förhållandet mellan wippi och naish är 1.36, alltså en wippi stl. 11.8 är i naish stl. ca en 16.

jag vet inte vad du menar med seglingsyta… kanske är ett w-surf uttryck men wippi mäter alltså fyrkanten som bildats när draken är i luften om man tänker två dimentionellt och naish den riktiga ytan på draken när den ligger platt.

Chill On.

EF

[mons]

då vet man det…. då har jag en fråga till som jag inte är helt säker på

hur mäter de AR? vad betyder det egentligen (siffrona)?

bra med så högt som möjligt, eller är det bra vid olika tillfällen? ögt AR= lång airtime?

[mav]

inte helt säker men tror det är förhållandet mellan bredd och längd. vilket leder till att om en drake är bred t ex AERO, Hydro går den trögt men tar in mycket vind(ger ett mer konstant drag) och smal som X2 eller ARX blir den snabb men kan uppfattas som ryckig i pustarna. jag skulle på stå att lagom är bäst. kör själv en ARX 9.5 voch är väldigt nöjd.

[anonym-anvandare]

Finns en artikel i November nummeret av Kiteboarding.
Tror jag tidningen heter iaf… Där finns en artikel om just AR. Summa summarum är att det egentligen inte står för nånting, då olika tillverkare använder sig av olika metoder för att mäta AR… Titta in på presstopp vetja och tjacka tidningen så kan du läsa själv…

[anonym-anvandare]

Att det inte står för nånting är väl ändå att ta i? Det är ju en term som kommer från läran om aerodynamiken, där den (om jag fattat saken rätt) är definierad som kvadraten på en vinges spännvidd delat med vingens faktiska yta.

Jag har inte läst artikeln du hänvisar till, men jag kan tänka mig att förvirringen kring Kite-AR bottnar i förvirringen kring yta. Dvs vilken yta ska man dividera med? projicerad eller platt?
Det borde väl gå att lösa genom att ange både platt AR och projicerad AR, eller?

/Rasmus

[mons]

var kan man få tag på denna tidning, eller bara artikeln?

[anonym-anvandare]

Inhandlade min på presstopp kungsgatan.. Hur som helst.. skriver in den här:

APECT RATIO DEBATE – By Ryan Riccitelli

The other day I was down at a new riding spot when this guy walked up to me and told me he wouldn’t like my new kite because of the aspect ratio.

He was an intermediate kiter but he carried on a 10-minute monologue about how and why my kite wouldn’t work for him. He backed it up with aeronautical engineering theories on wind displacement and airplane wing analogies. When he was finally finished, I looked him square in the eye and told him I don’t get too much into aspect ratio. I just go by how a kite feels when I am riding. That’s how I determine whether I like a kite. It was at this moment I realized the importance many kiteboarders place on that little number.
Aspect ratio — the very words remind me of geometry or some abstract math term I could never seem to grasp in school. I have experimented with a variety of kite shapes and sizes and have ridden enough kites to know the difference in feel between a high aspect ratio kite vs. a moderate aspect ratio kite. In my experience, the high aspect kite felt zippy and fast and was sometimes twitchy. By contrast, the moderate aspect kite was steady, smooth but often slower. Each design has its own appeal, depending on your riding style. However, if some random kiter could determine the performance of my brand new kite by the aspect ratio printed on the wingtip, then it was obvious I needed to investigate whether this number is actually a good way to gauge the performance of a kite.
I decided to question several very knowledgeable individuals in our industry on this subject. The following are few of my questions and the answers they provided.

How is aspect ratio determined, and is it a good way to compare kites ?

A basic way to measure aspect ratio is to take the span width and divide it by the center chord. Manufacturers aren ot consistent in their calculations. I don’t think it is a good way to compare kites with each other because you should fit the kite to the rider, not the aspect ratio to the rider. – Jeff Howard, Airush Design Team

Aspect ratio is a bunch of different companies trying to outdo each other on how hard they can tech out. If a kite is long and skinny it has a high aspect ratio. If a kite is short and fat it has a low aspect ratio — like a two-line kite. The best way to compare kites is to go and fly them and find out what you like. – Zack Young, Real Kiteboarding Coach

Aspect ratio these days is just a number. Every manufacturer uses a different way to precisely calculate their number, so it is not a truly accurate way to compare kites. The luff curve of a kite can significantly change how a kite will perform and is a major factor in comparing kites that is often overlooked. – Felix Pivec, Pro Rider

I have been kiting for three years and have seen aspect ratios change like the seasons – remember the AR5 ? I have also compared my kite side by side with other manufacturers’ and quickly saw that the aspect ratio measurements were completely different. Aspect ratio is not a good way to compare kites. – Jason Franks, Instructor

How does the aspect ratio affect the performance of the kite?
The lower the aspect of the kite the lower-ended the pull – that is, you basically get your power from the kite at a slower speed. The best way to look at it is that you wouldn’t want to put a beginner on a high aspect kite. The kite will work, but it is often twitchy and definitely harder to relaunch. – Jeff Howard

Personally, I have found that a skinny kite is going to out-turn a fatter kite. But the drawback of that, for a beginner, is that the performance of a lower aspect kite is appreciated at lower speeds. Just remember, while you are teching out, someone else is learning a new trick. – Zack Young

The higher the aspect ratio, the more unstable the kite is for the average person. If we look deeper into the design of the kite, the luff curve will determine where the kite sits and how fast it is. You can have a fat profile on the kite with a low luff curve percentage and the kite will still remain fast. Performance is also based on the luff curve. – Felix Pivec

From my experience, higher aspect kites go upwind more efficiently and are usually faster. The downside is that they often lack the raw power of a moderate aspect kite. Aspect ratio is important when it comes down to the feel of the kite, but the overall design is the best way to judge the performance. Ride them all and see what you like best. – Jason Franks

After hearing what the experts had to say, I was glad to see they agreed that aspect ratio is not the best way to determine a kite’s performance. There are many design elements in a kite that affect its true performance, and hinging those on a single number would be foolish. High aspect ratio kites should not be the first choice for beginners. Nonetheless, I encourage everyone to try a variety of kite sizes and designs and stick with what feels best.
Listen to the words of Zack Young: ”While you are teching out, someone else is learning a new trick.”

—
Garanterer inte att allt är korrekt avskrivet, allt gick på cirka 10 minuter, så läste och skrev utan att titta på det jag skrev… Men gå och köp tidningen annars..

//p

[mons]

tackar, lite mer koll nu!