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XHELI.COM . Autography FlightPower . Advantage Hobby

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Aerial Photography and Video > 4 sale: JR GSR, Mark IV + Sony HC5
 
 
vrwired
Senior Heliman
Location: Boulder County, CO

You guys are freakin me out!

I run the 401/9254 also..

No problems yet..

So.. keep the 401 and replace with an 8900? or ? What actually works with the 401 and is ultra reliable?

What about the Logitech 6100 and the servo that comes with it?
I use the logitech pair on my Trex 600, Maybe I should swap the 401/9254 and the logitech setup over from my Trex?

Anybody using logitech?

I'm Freakin Out!

JR GSR260 - Mark IV Cam Mount
Trex 600NSP
Trex 600E
Trex 450SE
Hornet X3D
05-12-2008 11:17 PM
 
 
cranester
Key Veteran
Location: Bogota, Colombia

Yes I want to replace my 9254 servo in my bergen but I'm not sure what to get...

Whats the best for the 401??

Juan Crane
05-12-2008 11:44 PM
HOMEPAGE  
 
 
Panomaniac
Senior Heliman
Location: Croatia - Adriatic coast

I think the big safety factor here is HOW do you setup your tail. There are several things that 9254 does't like like voltage over 5.3V, too much resistance in linkage, and mostly setting it the way to turn up the gain untin the tail wag, than lower just a litte. It is better to find lowest gain on wich tail hold its possition. I don't say that it was the case here, but there are lot improper setups wich result this way.
05-12-2008 11:53 PM
 
 
FCM
Elite Veteran
Location: Back in Blighty!

Just to put the record straight - I have never had a 9254 or 9253 servo fail on me (Benzine cameraships) with either a 401 or CSM SL720 gyro drivng them. What I have found though is they run very hot here in our tropical heat when they are used with a 401. That's an undersirable trait in my book as this servo is a standard plastic cased servo without a heat sink. As a minimum, I would look at using a heat sink tail servo if you must stay with the 401 gyro. Not sure if any heat sink sevos work with the 401 though?

Better to get rid of the 401 and look at your whole tail set-up again. The cost of doing this will be way lower than dealing with a failed tail servo.

And whatever set-up you do decide to run - make sure you follow Panomaniacs advice.

Paul.
05-13-2008 12:54 AM
 
 
KarbonBird
Key Veteran
Location: Australia

How about this one?

Futaba BLS251 Brushless Heli Tail Servo

Features

At least FIVE TIMES longer-lasting than brushed servos. 30% faster response times. Greater resistance to jolts and vibration. Smoother operation. Same power consumption as brushed digital servos. Same compact case size as standard servos. Exceptionally durable geartrain. Smooth dual ball bearings and strong Samarium Cobalt magnets.

Specs: Volts : 4.8V Torque : 47.0 oz-in / 3.8kg Speed : 0.06 sec/60° Dimensions Weight : 1.6 x 0.8 x 1.5 in. Weight 1.7 oz
05-13-2008 01:26 AM
 
 
Hogster
Key Veteran
Location: Surrey, UK

Hmmm £105 for a servo Seems a bit much for something that will never see 3D manoeuvres in its life (at least if I bought one to replace my 9254) .... are there any other low-cost high-reliability alternatives out there?

Cheers


David
05-13-2008 02:53 AM
HOMEPAGE  
 
 
FCM
Elite Veteran
Location: Back in Blighty!

Quote 
Futaba BLS251 Brushless Heli Tail Servo
That's what I use now and think it is highly suitable for AP/AV but it does need a suitable gyro such as the Futaba 611, CSM SL 760 or the Spartan to work with.

David, you are missing the point - cheap servos/gyros are a false economy IMHO. It's not a 3D thing.

Paul.
05-13-2008 03:15 AM
 
 
KarbonBird
Key Veteran
Location: Australia

This is the combo - looks quite good.

http://www.helikraft.com/Futaba/FUT...gyro+combo.html

Anyone tested for AP use on a GSR?
05-13-2008 03:55 AM
 
 
ah_ki_rah
New Heliman
Location: Sweden

Hey Uffe You didnt tell me you had another accident! Well well Ill be there next time you test ride your set up again. Hopefully before I have my own heli
05-15-2008 08:07 PM
 
 
wjw
Senior Heliman
Location: Cape Coral, Florida usa

I now have a total of 3 bad 9254's that I always thaught went bad as a result of vibrations in my gassers. Would be nice to have a reliable replacement, that BLS251 is looking good.
When I think about what I have invested in my gassers with camera set ups, I am not concerned about the cost of a servo. Even if I figure the pay back in "peace of mind" I come out ahead.
That is if the BSL251 can handle the vibs.
05-15-2008 10:27 PM
 
 
Hogster
Key Veteran
Location: Surrey, UK

Just curious, how many people have had 9254s fail on electric helicopters? Is it just the vibrations that are causing them to fail?

Cheers,


David
05-16-2008 12:27 AM
HOMEPAGE  
 
 
borneobear
Senior Heliman
Location: Kuala Lumpur, Malaysia.

David, I've been flying the same 9254 for over a year now, and I've never had it 'heat-up', as reported.
05-16-2008 02:52 AM
 
 
daytonabeach
Veteran
Location: Oslo, Norway

Hey guys, i notice many of you blame the 9254, can you document this, and that its not caused by the gyro itself? as someone mentioned, the combination with 401, and some havent had problems at all.

I mean, its easy to assume something, but i prefer facts rather than assumptions.
I have just installed the 9254 for the HC Profi internal gyro.
Would a temp check on the servo after landing help me to indicate if something is about to go, or will go wrong?

If some of you can guarantee that this servo is a bad choice no mattter what, please shout out

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
05-21-2008 07:57 PM
HOMEPAGE  
 
 
Uffe
Heliman
Location: Stockholm, Sweden

Summary

A little sum up of our crash. In the end it wasn't to bad, and that is thanks to Helicam Solutions.

After seeing the beginning of this thread, Jody contacted me an told me to send the crashed mount over for repair – for free. I wasn't even aware of this guarantee, but I put the scrap in a box and sent it to Texas. On the 12 of June the mount arrived in the postal office in San Antonio. It was picked up by Jody the same day. On the 19 of June the mount was repaired and sent back. The mount was more or less a rebuild, with electronics and retracts from the crashed one but new aluminum and carbon fiber parts. It was also modified with the latest features of MarkIV (mine was 2 years old). Jody also refused to receive payment for the shipping back to Sweden. All this cost me nothing.

The Mark IV is an expensive mount, but I've never experienced a customer care like this before. I don't know if this is the American way of doing business, or if it's just HCS standing out, but this would never happen in Sweden.

I hereby send a huge THANK YOU to Jody Prather (or Tody Patcher as written on the parcel by Swedish Post. This repair was however NOT a patch up.)

http://www.helikopterfoto.se
06-27-2008 11:43 AM
HOMEPAGE  
 
 
MRS
Heliman
Location: Netherlands

9254

Please guys, don't use this servo in an expencive ship. With it's rating it just has to work to hard on a heavy ship. Use the

http://www.servocity.com/html/hs-69...d_coreless.html

instead. Also useable with the 401.

The only disadvantage of the 401: it will take a new neutral point if the power is disconnected, even for a very short period, and there is a input to the tale. This is why i have a CSM SL720.
At the same circumstance it will go to normal.

Marcel

second year being 39, 25th year of being 15
06-27-2008 12:53 PM
HOMEPAGE  
 
 
KarbonBird
Key Veteran
Location: Australia

Quote 
Would be nice to have a reliable replacement, that BLS251 is looking good.

I have got the 611/BLS251 combo and that setup is really good. The "peace of mind" factor alone was worth the money spent. I have used the 401 for another small heli setup and the 9254 has been replaced in early retirement.
06-27-2008 01:08 PM
 
 
borneobear
Senior Heliman
Location: Kuala Lumpur, Malaysia.

MRS, I went through the Hitec HS 6965HB Specs, and its 6volt capable, and outputs 8 kg (!) of torque at this V. Compared to the 9254 which is limited to 2 kg (& 4.8 v) only!.

I know what's my next servo's gonna be.
Thanks!
06-27-2008 03:22 PM
 
 
HeliKalle
Senior Heliman
Location: Malmö, Sweden

Quote 
But I mean what's going on? Is someone after me or what?

Probably because you fly without proper UAS-certification from the Swedish Civil Aviation Authorty. Shame on you

Just my 2 cents!

/Christian
06-29-2008 12:03 AM
HOMEPAGE  
 
 
snurre
Heliman
Location: Sweden, Stockholm

Christian,
I think that was an inapropriate comment on a thread addressing the subject of the cause of a crash. If you wish to bring your subject up, the PM function would serve better, otherwise the atmosphere here easily gets infected.
Finally, , before closing this boring off topic subject:
How long time did YOU operate without the certification? Be honest please!
06-29-2008 04:50 PM
 
 
HeliKalle
Senior Heliman
Location: Malmö, Sweden

Quote 
I think that was an inapropriate comment
Of course you do. However since Uffe adressed this issue with me on the phone before he went into business, I don't think a PM would do any good.
When I started my business it was hard to get accurat information on the subject and I wasn't aware about the SCAA regulations until 2005. As soon as I got informed I stoped all operation until I got my certificat about half a year later.

Uffe: I do appologize if my comment was inapproperiate and off topic in your thread. I hope you'll find the problem on your heli soon.

/Christian
06-29-2008 11:11 PM
HOMEPAGE  
 
 
2 pages [ <<    <     1     ( 2 )    >    >> ]1475 viewsPOST REPLY
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Aerial Photography and Video > 4 sale: JR GSR, Mark IV + Sony HC5
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