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Century Helicopter . MTA Hobbies . MRC/Altech Marketing USA

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Radio - Servo - Gyro - Gov - Batt > FUTABA BLS-451 SERVO'S- GOOD OR BAD
 
 
JJMAN
Senior Heliman
Location: Chesapeake, Virginia - USA

I guess the Futaba guys are done answering our questions about this.

***I Like Jet Noise***
03-10-2008 02:38 PM
 
 
bkervaski
Key Veteran
Location: Birmingham, AL, USA

The BLS 451 is perfectly suited for helicopter use. The only heli-specific general-purpose servo futaba even offers is the 9255's along with various rudder servo's.

Point is, 9351's and 9252's aren't even heli servos. The 9351, the previously *preferred* 6.0v heli servo is a race car servo by design.

I fly the BLS 451's at 6.0v and find them to be tremendously capable servos and they use a *lot* less battery than 9255's and have better torque/speed and their longevity should be considerable.

I also fly them in a Jet and a high-speed plank. To date, they are my favorite servo's.

... will work for fuel ... Bill
03-10-2008 04:20 PM
HOMEPAGE  
 
 
whirlyspud
Veteran
Location: USA

" I have too much invested in my helis for the "possiblity" that it fail because of a damn servo."

Better quit flying then.

Mike
03-10-2008 04:22 PM
 
 
Hirobofly
Heliman
Location: Horten, Norway

People on these forums are never going to be satisfied no matter what Futaba does or answers.
So the best thing for Futaba to do is to not be led into endless "discussions" and multiple threads where people that hate Futaba spends their free time fueling the fire....

In this particular case Futaba has stepped up to the plate and provided information/answers. -Read B. Baxter's post again if unsure.

If you do not like the BLS-451, or not happy with available information, go buy something else. Easy as that.

RJ
03-10-2008 04:27 PM
 
 
turboomni
Elite Veteran
Location: 63 Rambler Down By The Dumpster

Futaba Quote

So far I like the servos a great deal. My concerns were of course the glitching problem which I have not had but the statement made by Krysta a Futaba Rep. I will quote her again>>>>

Quote 
There is no "design problem" with these servos. They were made for use in cars that do not require the precise centering abilities that a helicopter needs. They work as they should in cars.

My question again is which servos should I have bought that has the centering that is required for Heli's at 100 BUCKS APIECE!!!!!
She stated the centering is not good enough for heli use.
Is this SO????
I hope someone at Futaba will give us the straight poop on this.

Setup is everything, All my heli's can fly better than I can pilot them
03-10-2008 04:31 PM
 
 
MADTHREEDEEZ
Veteran
Location: Milmay, NJ

I would'nt doubt the centering capabilities of the BLS 451. It centers and holds FAR better than any other servo I have used.

Danny Calderone.
*********************
Magnum Fuels
03-10-2008 04:39 PM
 
 
bkervaski
Key Veteran
Location: Birmingham, AL, USA

The 451's center just as good as the 9255's.

These threads become viral. A few people out of the thousands that have bought a product post something on a forum due to a failure they experienced, next thing you know threads like this pop up.

It's a fact that out of *any* product there will be bad ones, there's no manufacturing process that will turn out a perfect product 100% of the time.

My decision to use the 451 is simply that of all many, many, many Futaba products I have owned I have had very few DOAs and failures.

My experience with the 16 or so 451's I have is they are 100% reliable, your mileage may vary.

... will work for fuel ... Bill
03-10-2008 05:19 PM
HOMEPAGE  
 
 
bbaxter
Heliman
Location: Central Illinois

There are NO difficulties with the BLS-451 servos, themselves. Here are some quotes from Futaba Team flyers:

"Well, I just read all the new stuff on the 451`s glitching. Maybe
there is something to it, but I have not had any problems on the Nitro
600`s. I am running them on 6 volts with a Duralite regulator and 1900
mah lipo battery. Heli is also carbon."

"No problems here either. I have them in my Caliber 90 and Freya EX2 on cyclics (both machines are eccpm). I've been flying the Freya since last fall with no issues. I've flown the models on 72 and 50 MHz Mode A and 2.4 FASST, again with no issues. However, I have been using only 4 cell ni-cd or ni-mh battery packs in both models.

Bottom line, I think these servos are phenomenal!"

"I have been using them since later September on the ailerons of my F3A model. Probably have around 100 flights on them, regulated to 6V.
Its an electric model so its pretty easy on servos but they have been
totally flawless.

I saw at the F3A Worlds a few other fliers were running them on glow
models, for rudder, elevator etc. and none of them mentioned having
issues with the servo.

It is a far better servo than anything I have used in that application
previously."

Bill Baxter, Manager
Futaba Service Center North America
3002 N. Apollo Dr. Suite 1
Champaign IL 61822
USA

Phone: (217) 398-0007
Fax: (217) 398-7721
Email: service@futaba-rc.com
Web: http://www.futaba-rc.com/index.html
03-10-2008 05:54 PM
 
 
Ace Dude
Elite Veteran
Location: USA

Bax, when can we expect a response to my question on the requirements for a power system to power these servos?



03-10-2008 06:20 PM
 
 
NEM3
Veteran
Location: New Lenox, Il

Bill I think the bottom line comes down to what the manufacturer recommends for their product. I would after all believe that the people who made the product, would know what is best for it. I think that is where all of this confusion, frustration and anger come from. People bought this servo under the recommendation of Futaba that it was able to be used in aircraft.

The appearance from my end is that now you are seeing failures and Futaba's reply to the problem is that it was never meant to be used in the application that Futaba originally claimed.

The whole way this has been treated is leaning towards shady.

I think a once and for all statement from Futaba is needed.

Are the BLS351's and BLS451's recommended to be used in aircraft or not. I don't want to hear other people's testimonials. It doesn't mean squat to me.
03-10-2008 06:24 PM
HOMEPAGE  
 
 
lfalsetto
Veteran
Location: COLORADO

I think what we are seeing is that a lot of retailers are sending the servo's back to Futaba, and they(Futaba) are concerned and the only way they can clean out their stock(inventory) is to say they are still good for heli's. Then they can make a modification to fix the problem. Kind of like a silent recall in the car industry. However, when you have a problem, it is now a used servo so tough. JR was standup with the 8411's and the conversion to 8311's, they admitted a problem and solved it, kind of like Ford did with the Firestone tires on the Explorer. Futaba is trying to make idle promises right now.
03-10-2008 07:23 PM
HOMEPAGE  
 
 
bbaxter
Heliman
Location: Central Illinois

As we stated earlier in the thread, the Futaba BLS-351 and BL-S451 servos can be used for any hobby application. R/C cars, R/C airplanes, R/C helicopters, R/C boats...whatever you find their speed and power is good for. This is per Futaba.

The Futaba BLS-251 servo is specifically intended for heli tail rotor control.

As far as power requirements are concerned, there are no specificatons. However, we'd suggest at least a 1,000 mAH battery pack if you run a 4-cell pack, and larger if you run a 5-cell pack (higher voltages will cause higher current draw).
03-10-2008 07:36 PM
 
 
lfalsetto
Veteran
Location: COLORADO

Like I said I will not risk a $2,500 heli on a belated promise, and an opps from the manufacturer that they misinterpreted their own specifications, too expensive to follow.
03-10-2008 08:14 PM
HOMEPAGE  
 
 
bkervaski
Key Veteran
Location: Birmingham, AL, USA

lol, they are stating it as fact, *ANY* R/C application.

Here's the statement:

http://www.gpdealera.com/cgi-bin/wg....pgm?I=FUTM0552

... will work for fuel ... Bill
03-10-2008 08:26 PM
HOMEPAGE  
 
 
nappyroots2182
Key Veteran
Location: Moline, il

this is why this year i went to everything jr. they stand behind everything they sell and make great stuff. i was futaba for the past 15yrs only and the past couple years have been getting dissapointing. i dont think ill be going back anytime soon.

DX7, Trex 600N, YS50, JR770 gyro, trex 500
03-10-2008 08:42 PM
 
 
turboomni
Elite Veteran
Location: 63 Rambler Down By The Dumpster

Well I'm going to use them and have been very happy with them so far with no problems. I just got upset with the whole application statement from Futaba. But since that is cleared up now:,,up up and away!!

Setup is everything, All my heli's can fly better than I can pilot them
03-10-2008 08:53 PM
 
 
jds5150
Heliman
Location: N/A

Futaba is already working on a new brushless heli servo. I think the model number is BLS-252. The primary voltage is 4.8V and it will be released with 3 other BLS servos later this year.
03-11-2008 04:00 AM
 
 
lfalsetto
Veteran
Location: COLORADO

I would be more comfortable with the new developed servo. It sounds like the BLS 451 suffered from the same desease teh JR 8411 did with heli's. Even if they resticker the servo it would add a lot of confidence and then stand behind their products. I called Futaba service this afternoon. Same senerio, you put it in the heli it is a used servo, they will not warranty the servo if opened for replacement.
03-11-2008 04:11 AM
HOMEPAGE  
 
 
NEM3
Veteran
Location: New Lenox, Il

For those of you wondering about power systems. I installed the 3 BLS451's and BLS251 tonight. Hooked up my eagle tree logger and did a little testing. Unfortunately I could not get the voltage and amperage on the receiver side. But the wattage should give you an insight to the power requirement. Here's the setup and results.

Fromeco Relion 4800mah Li-Ion pack
Arizona Heli Regulator set at 5.6V
2 JST leads to Futaba R149DP

Eagle Tree logger between the Li-Ion and Regulator.

Low Pack Voltage - 6.97V
High Amps - 6.83A
High Watts - 48W

Amps at idle - 0.25A (3) Servos

Amps at no load - 1.01A Per servo

This was with only (3) BLS451 servos plugged into the reciever. Results were obtained by fully locking the servos. Figures like these should not be seen in the air. But anything is possible. Mileage may vary.

But I think its astonishing that these suckers could be pulling almost 9A total or 3A a peice.

Make sure you can supply it before you fly it.

For those of you flying 4.8 packs, check your fully loaded volts. If a freshly charged 8.4V pack can drop to 7V, what is your 4.8 dropping to under load.
03-11-2008 04:46 AM
HOMEPAGE  
 
 
deafheliflyer
Veteran
Location: Arizona

hi

Thank YOU!!!

Thats what I wanted to hear..

Thats why Im going with a ReactorX with EvoRX 2100 pack... dont want to take any chances..


ReactorX is 15A continuous and thats what I need for 8717 which have HIGHER requirements than bls451..

Michael

Crash-Prone and overcoming it!!!
03-11-2008 04:50 AM
 
 
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Radio - Servo - Gyro - Gov - Batt > FUTABA BLS-451 SERVO'S- GOOD OR BAD
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