AXI 5330 F3A - Loose Magnets  
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AXI 5330 F3A - Loose Magnets - 5/4/2008 2:03:04 PM   
byoung466



Posts: 464
Joined: 7/12/2002
From: tulsa, OK, USA
Status: offline 		Im on my 2nd of these motors to loosen the magnets. Wondering how many others have had this problem.

Using either a Spin 99, or CC85 controller. 5.5 MM connectors, direct solder ESC to Motor, APC 20x13 or 20x15.

Also wondering what the longest time someone has on a AXI F3A.

Thinking about a different motor...dualsky or hacker. Would rather spend more money if the motor wont break...or get cheaper and buy a dozen.

Just curious whether Ive got something screwed up or if the MFR does.

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Brian
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RE: AXI 5330 F3A - Loose Magnets - 5/4/2008 2:56:39 PM   
woodie


 

Posts: 266
Joined: 6/10/2002
From: Placerville, CA, USA
Status: offline 		How is your motor mounted? Nose ring or firewall? Is there any flex in the firewall if it is mounted that way?

Woodie

(in reply to byoung466)
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RE: AXI 5330 F3A - Loose Magnets - 5/4/2008 3:44:47 PM   
byoung466



Posts: 464
Joined: 7/12/2002
From: tulsa, OK, USA
Status: offline 		firewall on standoffs 1/4 CF endgrain balsa laminate FW seems pretty stiff

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Brian

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RE: AXI 5330 F3A - Loose Magnets - 5/4/2008 11:25:09 PM   
woodie


 

Posts: 266
Joined: 6/10/2002
From: Placerville, CA, USA
Status: offline 		pretty stiff? If you can move the tip of the spinner more than about 1/16" total then that MAY be the issue. I have seen a similar setup with standoffs froma CF firewall eat up 2 AXIs in about 5 flights due to some vertical flexing. Make sure the mount is rigid or you may continue to experience the same issues.

I can only go by what I have seen, but after fixing the flexing issue by bracing the firewall, no more problems with magnet strikes against the stator or magnets coming loose. I think this is an area in outrunner mounting we are just beginning to understand (or suspect) as a potential problem area.

Woodie

(in reply to byoung466)
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RE: AXI 5330 F3A - Loose Magnets - 5/5/2008 2:25:14 AM   
shannah


 

Posts: 202
Joined: 9/6/2004
From: placentia, CA, USA
Status: offline 		Why would a small amount of flex in the firewall cause the magnets to strike? Is the motor bell able to move relative to the stator assembly?

(in reply to woodie)
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RE: AXI 5330 F3A - Loose Magnets - 5/5/2008 2:55:57 AM   
byoung466



Posts: 464
Joined: 7/12/2002
From: tulsa, OK, USA
Status: offline 		Well its not completly stiff but i feel like i am pushing 20 lbs to make it move, i can brace it anyway. Ill double behind with some aluminum angle under the mount screws.

The AXI f3a I REPLACED it with is the 1st one to not make any weird noise in flight. Great setup if I can keep it from breaking.

I do puzzle over how a flexing firewall would break the motor.

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Brian

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RE: AXI 5330 F3A - Loose Magnets - 5/5/2008 3:43:44 AM   
can773



Posts: 1599
Joined: 1/25/2002
From: Calgary, AB, CANADA
Status: offline 		Firewall flex should not cause those problems. I have been flying outrunners longer than most, on thin firewalls and get more than 1/16" flex at the spinner.....and never had anything like a rotor striking a stator. Personally I think losing magnets is related to the manufacturing of the motor and has nothing (or little) to do with setup.

Firewall movement will cause airframe vibration, but that should be it.

Just bite the bullet and buy a Pletty Evo All your woes will be over


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Chad Northeast

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RE: AXI 5330 F3A - Loose Magnets - 5/5/2008 3:44:21 AM   
ual767



Posts: 724
Joined: 12/3/2002
From: Chantilly, VA, USA
Status: offline 		Double check prop balance. That seems to be a common cause too and will throw the outrunner case out of balance enough to have the magnets strike and come loose. The motor should be replaced under warranty if a magnet came loose anyways. I had one make some noise like a magnet strike and had it replaced by Hobby Lobby under warranty. It was over a year old and maybe 200 flights on it.



< Message edited by ual767 -- 5/5/2008 4:49:10 AM >

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RE: AXI 5330 F3A - Loose Magnets - 5/5/2008 3:52:44 PM   
mups53


 

Posts: 1049
Joined: 1/15/2002
From: Hoffman Estates, IL, USA
Status: offline
quote:

ORIGINAL: can773

Firewall flex should not cause those problems. I have been flying outrunners longer than most, on thin firewalls and get more than 1/16" flex at the spinner.....and never had anything like a rotor striking a stator. Personally I think losing magnets is related to the manufacturing of the motor and has nothing (or little) to do with setup.

Firewall movement will cause airframe vibration, but that should be it.

Just bite the bullet and buy a Pletty Evo All your woes will be over


Chad I would get a Pletty but the prices are so high that I haven't. Any thoughts that they will ever reduce them?
How many flights have you had on one and have you had any problems with them?
Brian I've had one AXI do the same thing with the magnet and Hobby Lobby replaced it. You can't beat the customer service from them and Thunder Power is great too. I'm doing what Chris says and balancing the props better. Either way it sure beats fixing a YS all season. Mike

(in reply to can773)
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RE: AXI 5330 F3A - Loose Magnets - 5/5/2008 4:29:39 PM   
can773



Posts: 1599
Joined: 1/25/2002
From: Calgary, AB, CANADA
Status: offline 		Mike,

Sent you a PM about your questions.

Chad


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Chad Northeast

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RE: AXI 5330 F3A - Loose Magnets - 5/5/2008 9:58:27 PM   
byoung466



Posts: 464
Joined: 7/12/2002
From: tulsa, OK, USA
Status: offline 		Anyone ran the Hacker A60 Outrunners? I have an offer of credit towards one from Esprit, happens to be who I bought the motor from. Its heavier by a few ounces, not sure I can afford it but possibly could. Pletty is an option, how is the $ exchange affecting the price?

I would prefer to quit replacing broken stuff and will pay to avoid it.....but YS shows us thats not always the case...although I had pretty good luck with YS.

The only way I know of to isolate the problem is to go through things until you can repeat the problem and repeat the correction, I never seem to have the resources to do that kind of work. I can see a resonance in the system causing that motor can to hit the windings, also I can envision the same scenario if the MFR has a poor joint on a few magnets squealing at a certain resonance.

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Brian

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RE: AXI 5330 F3A - Loose Magnets - 5/5/2008 11:09:57 PM   
ual767



Posts: 724
Joined: 12/3/2002
From: Chantilly, VA, USA
Status: offline 		I ran the A60 20S. This is the same motor as Dave L. runs. You need a pretty light airframe to fly the higher classes with it. Axi F3A motor has more power for sure. I think Jim O. (OHD) ran the A60 20m for a little and may chime in with some performance info. The only issue with the A60's is that you have to mount it to the nose then make some bearing and support for the rear of the motor.

As far as the Axi, call Hobby Lobby anyways since they are the importer. I doubt they will say too bad since Esprit probably bought it from them in the first place.

I have a Pletty coming this week and should have some time to fly it shortly.

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RE: AXI 5330 F3A - Loose Magnets - 5/5/2008 11:27:51 PM   
Scott Smith



Posts: 272
Joined: 10/29/2002
From: Agawam, MA, USA
Status: offline
quote:

ORIGINAL: byoung466

Anyone ran the Hacker A60 Outrunners?


I'm running the A60-20S in a Prestige (DaveL setup.) Yes the airframe is very light...I'm right a 10lbs with 10S 5000 packs. An average Masters sequence takes less than 2000 mAH out of the battery.
I've had no issues with performance or reliablility after ~300 flights.

This motor worked fine in my 11 lb Patriot as well but the battery draw was higher.

(in reply to byoung466)
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RE: AXI 5330 F3A - Loose Magnets - 5/5/2008 11:46:45 PM   
byoung466



Posts: 464
Joined: 7/12/2002
From: tulsa, OK, USA
Status: offline 		Esprit offered to replace the AXI or credit as well, just wondered about getting another AXI. I geuss what are the odds of getting a 3rd one......... ...........it has been 9 months maybe they have worked through that inventory. HL wanted me to go through the people I bought it from.

As usuall I have learned a bit from this, lesson one electrics are quiet...if they arent somethings wrong and sooner or later you will figure out what.

Scott w/ regard to the A60 how many A's were you draining on the 11lb plane? Im 3 oz under 11 w/ my AXI and Leviosa and drawing 3500-4000 depending how big I fly and the wind.

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Brian

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