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Author Topic: Fly-Acoustik UL from Flykites  (Read 4285 times)
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Location: Gdynia, Poland

« on: May 29, 2013, 01:58 PM »

I posted this review on FA already, but  Ithink I should put it here as well.

I guess the time came to share some thoughts on the kite that I have been really impressed with for last two months.
I tried not to do it rightaway as I felt I was too excited discovering its abilities each time I was flying it.
Acoustik UL is a kite designed and developed by Konstantin Ratsos from Flykites, Greece *www.flykites*
My excitement comes also from the fact that I was observing the process of this kite’s development
and after seeing about 10 versions of this kite I finally got to fly the final product.
Reading this small review please keep in mind that I am not a very experienced kite flyer still not a complete novice. 
I am still at the learning phase which with this kite is a great experienece. But first things first… some general info…

Wingspan: 209cm
Height: 81 cm
A/R: 2.58
Weight: 193g + tailweight 12g

Leading edge: 4.5mm cft - Matrix
Spine: 5mm cft - Matrix
Lower spreaders: 5mm cft - Matrix
Upper spreader: 4mm cft - Exel
Stand-offs:  2.5mm – inner, 2mm - outer
Sail: Riptop nylon + Ventex Strong + mylar + PVC + dacron
Price: 140e


Acoustik is thought as a custom made kite, so I had a chance to choose my own color scheme (even for the dacrons).
The sail is sewn very neatly. Main panels are made of ripstop nylon and ventex, ripstop LE tunnels.
Reinforcements for sailgrabbers are of a light mylar and dacron pieces shaped nicely to fit into sail panelling.
Nose is covered in a PVC same as the tailweight velcro.
I like the simple solutions used in this kite starting from a simple pultruded carbon frame
through yo-yo stoppers made of cable ties up to PVC pipe slices used to hold the connectors in place – all to keep the kite light.

You can see more details on the images here:

Bridle is set as a 3-point with regulation of the AoA on the uphaul.
You can also add a small turbo –which is rather a compensation to use in turbulent winds.
But to get to the point…

The first thing for me was to change my „mode” of flying.
I was used to flying mostly STD kites, so I had to switch to a lighter, smoother movements for an UL. 
Acoustik has a nice wind range starting about 4-5km/h up to 30km/h (which I felt was too risky so I didn’t try higher winds).
The kite is very stable with no oversteer, it does not generate much pull but enough to give a good feedback on the lines.
It stays very responsive. Flying straight lines and sharp corners with precision is easy.

Acoustik feels very well balanced. It goes easily into flare/fade.
The same with a nice and deep turtle still with no problem to return from.
You can also feel the right balance in half axels and cascades/cradles – the pitch seems perfect to me.
What I really like about this kite are spins – flatspins in taz machine or 540s are really flat and nice,
also when it comes to lazy susan rotation (with nice multi lazy) and easily executed cyniques.

Other tricks (which I am able to perform) come also easily and nice – jaccob’s ladder, yo-yo, lewis, backspins.
Also „ground tricks” and start tricks are included – roll-up start, superstart or rising fade.
Flapjack works very nice here as well – the first one I tried (not used to UL kites)
with a stronger pull became a flapjack with a double spin – from one pull!
There is still a lot of tricks which I am still learning or which I didn’t try yet, so I am writing only about those I managed to execute.
You can see much more on Alex Belov’s videos (which I suppose a lot of you have already seen):
They show much more possibilities of Acoustik UL.
I hope Alex as a more experienced pilot will also share his thoughts on this kite.

What may be important to add, I consider Acoustik UL a really good kite for learning tricks.
Looking at my own progress.  I used it for 2 months - the weather was not always good
so it is hard to tell how many hours I spend with it. It might be about 10 sessions with 2 hours avarage.
I can count the tricks I learned at this time:
- 540 – never tried it before – came easily
- 2-pop roll-up
- cascade to taz
- cynique
- a combo of superstart-to-cynique (which I was really surprised with at the begining).

I don’t know if it is much but I feel like evolving using this kite.
Also I gave the kite to a few novice pilots (I hope the guys will not feel offended) to try it.
Right from the first shot they were able to execute lazy susan, flapjack or even a roll-up start.
I have a feeling this might be a good kite to start to learn freestyle with.

Before posting this text I read it once more.
I am sorry for being so enthusiastic about this kite but I can’t help it! I tried to keep as clear-headed
and dispassionte as possible writing this „review”.
I will let you know when I find something that would change my opinion on Acoustik.
For now the only disadvantage is that I find it highly addictive...

To give a full view (or my point of view) below you can find my videos from flying sessions with Acoustik UL:
and also a few scenes here:

*Direct Link Removed*

As Per Forum Guidelines.
« Last Edit: December 15, 2013, 06:19 AM by JimB » Logged

in my bag: Eolo Genesis, Eolo Over, DIY l'Organic, Kitehouse Pulsar, DIY SixthSense, DIY Magnet, Fly-Acoustik UL
Ara Ararauna
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Location: Sant Cugat (Barcelona)

« Reply #1 on: May 29, 2013, 02:08 PM »

I love the sail layout!
And I've seen other color combos which are also absolutely beautiful.
For example the white and blue in the "Acoustik UL@winter" video is amazing:
I have also followed a bit its development and it is really interesting.
The man that designed it is really a kite scientist.

I really like it!
« Last Edit: May 29, 2013, 02:12 PM by Ara Ararauna » Logged

In my bag...
Duals: NoName (NoBrand), Nexus (Prism), Soul (Flying Wings), Talon UL (JoE), LeQuartz (own build), Illusion Classic (Prism), Aura SUL custom (Skyburner), Sixth Sense STD (Krijn)
Singles: Conyne STD (my design)
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Location: Scottshead Australia

« Reply #2 on: May 30, 2013, 06:35 AM »

Oh yes,
These kites are driving me carazzzy  Tongue
It looks like a F-1 waiting in the PITS.
Hot kite Sir and flying.
Those videos are extra clear and those 540s   Tongue
I feel sorry for the rest of your kites.
« Last Edit: May 30, 2013, 11:00 AM by alien » Logged
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Location: Gdynia, Poland

« Reply #3 on: June 02, 2013, 03:18 PM »

The man that designed it is really a kite scientist.

That's a good word to describe his approach!
He is a kite scientist!
Also with a great need to make the kite perfect.
Somehow I feel I don't really have the final version of this kite.
I suppose there still will be some slight changes all the time Wink

I feel sorry for the rest of your kites.

Thanks, but don't be Wink
Fortunately Acoustik is the only UL in my bag.
In higher winds the other kites are still in use Wink
But I am glad I don't have a STD!
I suppose I could get rid of the rest of my bag Wink


in my bag: Eolo Genesis, Eolo Over, DIY l'Organic, Kitehouse Pulsar, DIY SixthSense, DIY Magnet, Fly-Acoustik UL
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Location: Russia - Saint-Petersburg

« Reply #4 on: December 15, 2013, 02:51 AM »

Kostaaa made new video  Huh Kite is PERFECT!!!!
FlyKites - Acoustik UL Over the Year on Vimeo
Ara Ararauna
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Location: Sant Cugat (Barcelona)

« Reply #5 on: December 15, 2013, 09:39 AM »

I really L*O*V*E the design of this kite.
I would say it is one of my top 3 favourite layouts.
Incredibly elegant, but sporty and aerodynamic.

If it flies as good as it looks and as good as Pa79vel's review, then it must be a heck of a kite!

Unfortunately I cannot have the chance of trying it.  Sad
Someday I might.

« Last Edit: December 15, 2013, 10:35 AM by Ara Ararauna » Logged

In my bag...
Duals: NoName (NoBrand), Nexus (Prism), Soul (Flying Wings), Talon UL (JoE), LeQuartz (own build), Illusion Classic (Prism), Aura SUL custom (Skyburner), Sixth Sense STD (Krijn)
Singles: Conyne STD (my design)
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« Reply #6 on: December 15, 2013, 10:20 AM »

Is this an SUL?

Even with the tail weight, 205 gms (7.23 oz) seems unusually light.

Good looker, as others have said.  Smiley

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« Reply #7 on: December 15, 2013, 04:49 PM »

Hello guys, this is Kostaaa from FlyKites (sounding like a Rock Star... hahh  Grin)

Now seriously... let me thank Pawel for the detailed review, first of all.

I'm glad that you like the panel's design. Actually, it took me only a week to complete it (I had the original idea ~1.5y earlier).
I was happy to find something nice looking and unique (different to any kite that I know).
Compared to the whole time that I spent at the last 3 years working on this project is..... "drop in the ocean"
The original idea/challenge was to develop high performance trick kite using simple building materials.
I try to make the developing process of Acoustik-kite as scientific, as possible.... this takes a lot of time and many measurements, calculations & tests.

Is this an SUL?
good question.... According to my standards it's not real SUL.
Yes, the weight of the Classic UL version (205-206g) is lower than some SULs with similar wingspan, but I think the wind rage fits more to the "UL" kites. I totally agree with the Pawel's description. Let me add, in very low winds (barely detectable by exposure skin - true SUL zone)... the kite can be used with short (15m) lines and do many tricks without "dead-stall-fall-down" tendency. Of course, steps back are required time to time, but it remains responsive and moving with "flow".
The weight of the current Dynamik (DT12) version is 194g, the next Dynamik prototype will be ~180g (about 25g lighter than the Classic!).
Speaking about the weight..... SUL (in process) will be ~110g (or even less...)
Looking carefully at the details and measuring every single part, there is a lot of space for weight reduction and still remaining robust enough.

More News soon, stay tuned!
Best Regards!


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