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Old 05-22-2012, 06:18 AM   #1 (permalink)
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Default Test Gryphon 700 blades

Test Gryphon 700 blades

Introduction:

Gryphon has been brought to my attention a while ago and I noticed they are producing very interesting products for RC heli pilots.
Next to blades, they offer smart and good looking electronics for Nitro and electric helicopters.
http://www.gryphon.co.kr/

RogiŽr, Gm of Rigidheli.com distributes Gryphon in the EU/Benelux, and he managed to get hold of a couple of prototype sets of the brand new 700 mm blades.
He also provided two sets of the already released 615 blades to be tested by a selection of Dutch 3D Pilots.
The 615 mm blades were tested by Anko Dragt (Hex50) en Niels Breet (Logo 600).
The 700 mm blades were tested by Eric Weijers en Frank Nijboer (Compass 7HV).

Often people suggest Carbon Fiber blades are produced in the same, or just in a couple of factories and the technical differences are very minor.
Same airfoil type, molds, with small modifications here and there.
And most of the flight characteristics are heavily tempered by the settings and operation of our flybarless controllers.
And to be honest, I shared that vision to a certain degree before I actually started testing different blades on the exact same setup.
Itís also a fact these blades are produced in Korea, and developed and tested under full supervision of Gryphon.

The 615 Blades are released and available.
But iíd like to mention that both Anko and Niels really do like the overall performance and feel of these blades.
They have a super agile and direct feel to them, and some extra Exponential was needed.
The blades are still used by both pilots, and they stick to them so I was told.
So that tells something about their personal conclusion.


Equipment and reference material:

During the tests I used a Compass Atom 7HV, identical lipo batteries and approximately the same flight time and maneuvers.
A mix of Funnels and transitions, controlled piroflips, pirofunnels, tictocs in all orientations, rolls and flips, fast/slow, etc.etc.
All logged with an Eagletree module, and I did my very best to create an objective opinion out of each flight, and concentrate on the differences.

I tested two sample sets of Gryphon 700 blades.
Both with an unique Weight (center of gravity) placement.
Iíll refer to them as Sample A&B.
Between flights I switched between Edge 693, Edge Se 693, Rail blades 696, Compass 700.
To remain objective and fresh.

Blade specifications:

Gryphon 700:
Bolt to blade tip: 700 mm Root thickness: 14 mm Weight: 200 gram

Quality, Packaging and Presentation

The blades look really nice, good quality.
High gloss finish and the same solid feel all around, no weak or soft spots hiding under the Carbon.
The bolt bushings are made from aluminum.
The tips have a more rounded shape than most other blades.
And the paint scheme is stylish and very practical.
The Gryphon brand is nicely printed in gold on each blade and a bright red stripe covers the leading edge of the mostly white colored blades.
I personally like white, makes them more visible, especially when you're flying low.

The packaging is one of the most creative Iíve seen so far.
Simple but also very cool.
The blades are separated by two small pre-formed blocks made out of a firm foam in a black cardboard box with Holographic silver lettering.
To top it off, there is a wiping cloth included to remove any airflow interfering buggy objects...




Testing:

On the first day the test team had a lot of fun, but also a lot of bad luck.
A set of Gryphons type B got lost along with a 7HV during a spectacular flight by Frank.
In a wide, tail first inverted looping the 7HV just touched the long grass and it got pulled in hard.
After my first flight with sample A, I got pretty excited, and persuaded Niels to try them on his 7HV.
After less than a minute one of his swash balls backed out and autorotating was not an option.
He also came in hard.
We had an early opportunity to Judge the way they crash, I wished we didn't though.
But they are save, a steel wire keeps them together and no parts or Carbon were coming our way.

Luckily we had a sample set A & B left, to continue the testing.
All following flights were logged in the eagle tree module, flights with the other blades as well.
I soon realised during examination of the Graphs, that I couldnít find any significant differences between them.
Itís simply not accurate enough.
The only way to do this appropriately, would be in a lab with a controlled testing rig and identical load/pitch patterns.
I donít have access to this kind of equipment, so i concentrated on what i could feel.
Below an Amp graph of both blade types for who is interested:

Eagletree:




Comparison:

To describe a certain feel is a bit complicated, and I never read a report of this kind before, so to make things a bit more clear I decided to put some flight characteristics in a Table and add my personal score to each characteristic.



Conclusion:

The scores seem to have worked, my end verdict pretty much resembles the table results.
They fly well, and the first flight I had with ďsample AĒ was an absolute ďWOWĒ moment.
I was not alone, all four of us shared the same feeling.
Frank, Anko, Niels and later Danny (friend who flies Railblades) confirmed the same.

Sample A reacts particularly well in cyclic transitions and executing / exiting the more demanding maneuvers.
They remain precise and without wobble in small corrections, even under heavy loading of the disc.
Stops and punchout are also crisp and direct, no wobble or unwanted side effects there.
This tells me they are very effective, also on varying and lower head speeds.
The cyclic speed is comparable with most 690 blades I flew.
Something which is lacking most of the time once you go bigger than 690.

Sample B also performed well.
But did not excel like Sample A.
They felt a lot like the Edge SE blades, a bit more static but a lot of velocity on the short run.
My friend Herbert tested them on high speed runs (200 + Km/h ).
But the samples both seem to be designed as 3D blades, too sensitive / unstable for speedflying.

What people prefer or like more, is, and always will remain a personal preference.
The properties, or feel of a rotor blade most likely belongs in that category.
But I know from my own experience, differences do exist...
My conclusion,
Gryphon did a great job so far, and managed to produce a very nice set of blades.
Hard to suggest any further improvements, these are definitely keepers.
Iím sure they will have plenty of satisfied customers after release.

Regards,
Eric
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Old 05-22-2012, 11:37 AM   #2 (permalink)
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I loved flying these blades, blade A is very precise on the cyclic and felt promising
i did 2 flight with the A blades and my first reaction was never had blades like this!
Blade B first thing on my mind was they feel like my edge SE blades but also precise but there was not the wow effect of Blade A I did only 1 flight with these blades because i crashed it hard in the high grass but just what eric said they are safe you don`t want to have a half blade flying towards you!

thanks for letting me test this blades
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Old 05-23-2012, 04:30 PM   #3 (permalink)
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So, guys, are the Sample A blades different from what is already released?

LINK

Also, was it not your intention to share the table your created for comparing the blades with your Edge counterparts?
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Old 05-23-2012, 05:32 PM   #4 (permalink)
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Hi Rob,

I've flown two different test samples, so they must be new types., the specs also differ from the ones you linked.
As I mentioned in the review, there was not much difference to be found in the Graphs, also with other brand blades mounted I got similar graph results.
My Amp peeks stayed practically the same, temperature and battery use differences were minor.etc.Just not accurate enough to make conclusions based on that only, or to use as a prove of improvement.
Could post the whole lot, but the difference in "feel" do not reflect at all in the graphs.
All blades tested are "good" blades to start with, no doubt about it.
That's why all my friends also got a chance to try them.
You really have to try them all to notice the differences.
Sample A really jumped out, I sure like them.
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Old 05-23-2012, 09:05 PM   #5 (permalink)
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One thing I noted is that the Gryphon blades in the link I posted are not described as flybarless. I didn't note if the ones you tested are designated flybarless.

Still, best report on blades I've seen yet. I liked your qualitative analysis table. This is good a way to describe relative characteristics as could reasonably be done. Good show!

I recently installed a set of Rail 696 on ye olde 7HV and found they feel smooth, but not as much pop as I had experienced with the Mavrikk G5 Pro Wide Chords. I believe there is something about how efficiently the blades convert input energy to lift. In a heli with all else equal, some blades provide the pop factor, but not as much thrust with collective input at a given governed headspeed after the initial response. A full collective punchout can show this. I believe my Rail blades provide the later, while the Mavrikks provide the pop. It might translate to speed in FFF, but not necessarily since other factors might begin to take effect with increasing forward speed. Fun stuff, whatever is going on.



Thanks for your report!
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Old 06-14-2012, 06:48 PM   #6 (permalink)
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Good afternoon,

the blades teted here are the FBL version.

SInce the factory was built ( in Korea, the blades are not OEM'd from an external source) , many different blades have been created and tested.

We tested early prototypes in USA and reworked from the test results, then we made a second production and had some good FB blades but FBL was not satisfying ( too soft, or when strong enough some high load on engine) and finally we found a solution, and Rigidheli store in Europe and Anko Dragt and Eric performed intensive flying tests with various sets for FBL.

The new blades have colors on them ( Red for FBL) and will be available for the 700's within 2 weeks. 615's FB and FBL are available already.

We are making 435's, 325's and tail rotor blades and also FAI / F3C / Spedflying blades, in small quantities.

For official country flying teams ( F3C for example), we can make specific weight and cg's blades when it's possible to achieve.

But blades feeling is varius from a customer to another, i will simply say that the profile we use is pretty agressive under neutral for very fast small moves ( tic tocs and stuffs) and will smack perfectly if you redice a bit the overall pitch value on pitch and cyclic ( they will stall a bit if you have too much pitch on them).

Except this, well it's impossible to say more, this is more a customer feeling that will make that he likes them, or not

Best regards,

Fabien
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Old 06-15-2012, 07:02 AM   #7 (permalink)
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Thanks for the additional info Fabien.
The stall effect is minor though when you use "normal" pitch values and use them well (steer instead of banging).
But still if you like to stick bang, simply decrease the max. deflections on cyclic/collective or add some expo.
The biggest advantage of these blades is the very direct and precise steering, feels very "connected" compared to others.
Can't wait to test the upcoming tail blades.

Eric
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Old 07-01-2012, 11:31 PM   #8 (permalink)
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Excellent write up Eric. I really like the way you approached this with the matrix of features and their rating, I think this should be a standard way of measuring blades when people do reviews in the future.

I've played with the original 700 Blades (black/white paint) and thought they were very reasonable, that said, they flew very similar to my existing set of Edge 713mm blades. Now that they have since changed with the new release, I think I will keep them on display.

I've also tried out the newer 615mm Blades too, found these flew quite nice as well, excellent finish on the paint, definitely up there with the best of them. Have taken these blades off for now and will be putting them on an AvantGarde shortly.
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Old 07-20-2012, 12:42 PM   #9 (permalink)
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Hi,

the 435's and 325's will soon be available also

Regarding the 700's, the new ones are much stiffer, this has been requested by Goblin and TDr pilots moslty to avoid boom strikes ( lol ). The sets tested in this thread were the latest versions that are now distributed.

BEst regards,

Fabien
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Old 07-26-2012, 05:32 AM   #10 (permalink)
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Test result is corrected. My best friend test New Gryphon Blade 700mm on Gaui X7 and he found same result as Eric wrote on above.

cyclic is very good / stop means stop / very strong blade / sound like the thunder


[ame]http://www.youtube.com/watch?v=fhje0Z9gMRc[/ame]
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