This site has a huge range of aerodynamics info, the start page is here:
www.grc.nasa.gov/WWW/K-12/airplane/short.html

It even has a kite simulator, so you can change the design of a virtual kite and see how well (or badly) it flies:

www.grc.nasa.gov/WWW/K-12/airplane/kiteprog.html

Select "Sled kite", then change a few sliders until you get something that looks like your favourite kite. Then see what it says about stability

quote:

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Originally posted by realplayer

i am a pilot and have basic knowledge on aerodynamics,ill give you a brief info for people who cant be bothered read the whole article.

If anyone has any questions just ask me, its kinda my thing

~Alex

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Yes - I have a question. Did you actually read the article?

What i found fascinating was that the common explanation of the lift based on Bernouilles theorem is incorrect. It is actually the Coanda effect that explains it. The Coanda effect i think also explains why a breeze will wrap around a point as it hits land.

The common explanation, from The Way Things Work [Macaulay 1988]

The reasoning--though incomplete--is based on the Bernoulli effect, which correctly correlates the increased speed with which air moves over a surface and the lowered air pressure measured at that surface.


This is from the first link posted..... but i see whee your comming from

Realplayer, you think your a hot shot in Aerodinamics and you still get C's in Physics....

Just playing .

quote:

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Originally posted by realplayer

i am a pilot and have basic knowledge on aerodynamics,...

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How do you know a pilot is at a party?
They'll tell you

Sorry mate, my mates are all pilots, so I flog it when I can

firstly the beach was unsafe, bugger now the sky is out of bounds... if you fly a plane anything like a kite, we're all in big trouble... lucky they say it's easier than driving a car......you don't have your car licence yet do you....
remember, the ejector seat is not a safety system you want to pull... and landing down wind is like kiteing in off shore winds

So how does the Coanda effect explain how planes can fly upside down?
I must be missing something here with this Raskin thing.

Julian,, i have to say that one aluded me. Maybe the wing is angled upwards, the horizontal stream of air hitting the leading edge deflects down along the surface of the upturned wing causing lift.
MANFRED EMAILED ME

mesage for you and Chris

Hai Doc,

with the UDS-III your kite will :

- turn a lot faster (even in depower mode it is faster than now in power mode)
- it will have more max power for better and higher jumps
- it will have more depower, down to nearly zero ( if you can handle your kite with such a high depower rate)
- it will be much faster as before
- it will have much better upwind ability as now,
- ......

The price you have to pay for it, is that you have to be able to feel your kite when it is extremely depowered.

This is what paragliding pilots call "active flying". If you can not, there might be situations that make the kite front stall.

For example if you steer hard and ride directly in direction of the kite.

This is a fatal piloting mistake anyway, but an original Speed will stay stable, a totally depowered Speed will not.

Tell your "kite mates" the kites are already converted and waiting for good winds to be tuned.

Why didn' t you send the kites with the other ones, you would have saved a lot of shipping costs ???


Cheers

M.M.

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----- Original Message -----
From: Dr Jeremy Buttsworth
To: [email protected]
Sent: Sunday, May 20, 2007 4:45 PM
Subject: speed 1 10m speed 1 17m


Hi Manfred



I have read your posts about tuning and also visited the paraflysurf website.



If I sent you my two speed kites for the UDS 111 system what could I expect in performance;

More depowerable,,increased upper wind range performance?
Lower wind range higher ie not as good
better turning
more demanding piloting to prevent luff and stall but better performing in terms of power and turning?




Tks Jeremy



Ps; My kite mates Chris Rowling and Julian Mander have both sent you their kites.

May be you should have an Aussie summer holiday here!!






Manfred emailed me;

quote:

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Originally posted by jan

quote:

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Originally posted by realplayer

ye coz physics is **** who wants to know about an resistors and circuits ;p;

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theres a difference?

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ye coz AERO dynamics, refers to AERO planes, which fly high and fast

sleek, my dribble had nothing to do with this thread. there is even more bull**** here than my usual posts.
so how about you pull your head in and get back to lighting fires in gippsland

quote:

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Originally posted by sleek1

geez you got em talking **** stamp

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