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Old Jul 08, 2012, 09:18 AM
Friedrichshafen, Germany
autist's Avatar
Joined Mar 2012
39 Posts
Quote:
Originally Posted by larry baraniuk View Post
I sure have had my share of bad usb to ttl cables also.
I might try the cheap ebay ones that are mentioned on the above post.
I think I'll buy half a dozen and see how my success rate is.
it is good, to know others with defect cables.
I have ordered 4 new -- 3 are good.

Backlooking I fly with FY31AP since nov.2011, each function (RTH, Waypointflying, Circling, Controlled Flight ) is allways well.
Attention: I dont use gas with FY31AP . This chanel is going from RX direct to servo ( BSC). I know the position of gasstick for holding height. Also used in failsafe.

And I watch for no vibrations accurately.

Vibrations may be a severe reason to delete a model.
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Old Jul 08, 2012, 05:08 PM
Registered User
United States, AZ, New River
Joined Apr 2007
23 Posts
I usually do not post here, mostly on RCU and mostly on the hobby side.
I work for a major manufacturer of UAS. I have been flying RC for 40 years, designing airframes for 12 years, integrating and participating in the design of AP systems for 10 years. My team includes 36 specialists in electronics, software, mech, aeronautics and testing.

This issue with Feiyu was over 18 months ago. I understand that the products might be improved, but I seriously doubt that their attitude can or will improve. This experiment cost a lot of money. Putting over 10 hours of flight time on these units was a lot of work.

Most of our test flights were in the range of 20-45 minutes each.

I'm sorry I cannot comment more on this, but I can assure you I have nothing to win from badmouthing Feiyu. I am simply stating the bare truth about their absolute lack of honesty. I (and my team) are certain that they knew their product was not reliable, but they misled us to thinking otherwise.

Best Regards.
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Old Jul 08, 2012, 05:15 PM
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Banff Alberta Canada
Joined Nov 2004
569 Posts
Thanks for your honest opinion
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Old Jul 08, 2012, 06:58 PM
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Australia, NSW, Sydney
Joined Apr 2006
2,239 Posts
Please post the flight recorded video of the OSD as I'm sure someone here may be able to help diagnose the issue.

I'm surprised that you took the second (and third) flight before you had completely diagnosed what caused the fail.

Cheers

Matt


Quote:
Originally Posted by yak13 View Post
I usually do not post here, mostly on RCU and mostly on the hobby side.
I work for a major manufacturer of UAS. I have been flying RC for 40 years, designing airframes for 12 years, integrating and participating in the design of AP systems for 10 years. My team includes 36 specialists in electronics, software, mech, aeronautics and testing.

This issue with Feiyu was over 18 months ago. I understand that the products might be improved, but I seriously doubt that their attitude can or will improve. This experiment cost a lot of money. Putting over 10 hours of flight time on these units was a lot of work.

Most of our test flights were in the range of 20-45 minutes each.

I'm sorry I cannot comment more on this, but I can assure you I have nothing to win from badmouthing Feiyu. I am simply stating the bare truth about their absolute lack of honesty. I (and my team) are certain that they knew their product was not reliable, but they misled us to thinking otherwise.

Best Regards.
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Old Jul 08, 2012, 08:14 PM
Registered User
Banff Alberta Canada
Joined Nov 2004
569 Posts
I'm wondering if there are others out there that are having reliability problems with
the FY-31ap. In my opinion ,I don't think that it is.
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Old Jul 09, 2012, 04:07 AM
Oopss. Oh well.
borneobear's Avatar
In the tropics
Joined Jan 2006
3,623 Posts
Quote:
Originally Posted by yak13 View Post
I was commissioned by my employer to evaluate several autopilots, Feiyu's not included in the initial list. I had the bright idea of including them, getting funds to buy FIVE units.

After lots of money and hours of integration (very professional installation done), we finally started testing. Everything ok in ground tests, so decided to fly them. Several flights ok, until a fatal error in the stabilization causes crash, destroying the plane and damaging most of the components.

We contacted Feiyu and got a clumsy response, stating basically that we had to further isolate vibration. We were using an electric motor (AXI), balanced prop, and a professional grade installation of the AP unit, using expensive silicone grommets and other devices to achieve three stages of isolation.

We decided to try a second airframe and a new AP. Exactly the same story, after about 5 hrs of total flight time, the unit fails and the plane spins like crazy to the ground, 100% destroyed.

We decided to contact Feiyu again. Same ridiculous attitude, now stating that we should check for proper electric hookup. We decided to go with separate battery packs for the AP, electronics, and motor.

Same story again!!! after 3:15 of total flight time, the plane enters a spin only a few meters from landing. We all clearly saw how the ailerons deflected fully, while the elevator went to a full down position. Being so close, we got every moment on video to confirm our observations.

Project cancelled, several thousand dollars down the drain. Ripped off by Feiyu.

I'm sorry I found this thread until now, but I feel my obligation is to say it straight:
Feiyu is an irresponsible company and its products are trash. You may want to look for similar experiences in Europe, where many airframes have been destroyed and many lies have been laid out by the supplier.

For all of you wondering, we did take care of ventilation and every possible aspect that might affect the electronics. We are not new at this and I have a professional team that includes specialists in several fields.

Hope this helps you guys before you get screwed by these people.

Regards to all.

1. If you had taken pictures of your set up, post it. You may get relevant feedback from us which you did not consider before.

2. The only time any of my FY system failed was when I did not supply enough power to the system. i.e. did not use External BEC. I found 4A and above gave better result.
My castle 20A BEC has been flawless.

3. If your plane is flying too slow to the point of stalling, no autopilot / stabilizer can help you.

I know you're a 'company' doing UAVs, and you probably won't share anything here other than rant about the 'idiots' at Feiyu, but this rarely gets you anywhere.

I've been flying my X8 for AP with the 31AP and find it great for stability. Will try the GCS when I have the time.

Cheers,

BB
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Old Jul 09, 2012, 12:30 PM
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brifa's Avatar
ITALY
Joined Aug 2006
418 Posts
Well..
my experience with feiyu products is fantastic. I started with 2 X fy21ap with ap117 osd and they worked great! some monthes ago i bought also the fy31 ap and now i'm going to install it on a skywalker... (upgraded to 1.20 firmware). After all i read in this thread i am a little afraid to use the fy31 and saying that the fy21s didn't have any problem since one year and hundreds km gone....
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Old Jul 09, 2012, 03:38 PM
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saabguyspg's Avatar
Calgary Canada
Joined Jun 2006
5,122 Posts
You must draw your own conclusions from your past experiences with fy I think
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Old Jul 09, 2012, 04:02 PM
Better then Sliced Bread!
NorCalMatCat's Avatar
United States, CA, Arcata
Joined Oct 2011
2,650 Posts
Well the FY31AP is a hobby grade AP, I would imagine for a non-hobby UAS system you would go with something more like the Panda or another more professional grade equipment setup... with that being said other then sticky adjustment pots on the first 31AP I got (which RMRC replaced) I haven't had much of a problem, is it perfect? No, but for hobby grade and the price it's a fine piece of equipment.
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Old Jul 09, 2012, 04:14 PM
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Calgary Canada
Joined Jun 2006
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Agreed
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Old Jul 09, 2012, 04:32 PM
An Aussie in Chicago
Joined Apr 2012
1,350 Posts
Quote:
Originally Posted by NorCalMatCat View Post
Well the FY31AP is a hobby grade AP, I would imagine for a non-hobby UAS system you would go with something more like the Panda or another more professional grade equipment setup... with that being said other then sticky adjustment pots on the first 31AP I got (which RMRC replaced) I haven't had much of a problem, is it perfect? No, but for hobby grade and the price it's a fine piece of equipment.
The GCS could be more reliable but the hardware side seems fine with my testing. I just velcro in place and never worried about vibration or had any issues.
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Old Jul 09, 2012, 04:34 PM
Better then Sliced Bread!
NorCalMatCat's Avatar
United States, CA, Arcata
Joined Oct 2011
2,650 Posts
Yeah the GCS sucks... eventually when I get a data radio and can figure out the communication protocol I will write my own GCS :P
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Old Jul 09, 2012, 09:14 PM
Registered User
Banff Alberta Canada
Joined Nov 2004
569 Posts
I agree that the GCS is not reliable and I think its time for me to look for a higher end product.
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Old Jul 10, 2012, 02:08 AM
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Calgary Canada
Joined Jun 2006
5,122 Posts
the next step up form this in the chinese market is the Zero UAV.

I have an old version, the new version is based loosly on the YSX6

If you want more info email me at aap@telus.net

Steve
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Old Jul 10, 2012, 04:46 PM
Registered User
Banff Alberta Canada
Joined Nov 2004
569 Posts
I think I will give Ardupilot open source another try.
I really want to deal with a product that has English speaking
product support. I'm also getting tired of buying stuff from China that
quickly ends up in the junk pile.
I found out that the Ardupilot boards are made in Mexico.
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