http://www3.towerhobbies.com/cgi-bin...?&I=LXRJS5&P=0

has anyone tryed this???
seems pretty fast and strong..thinking about ailrons?

about 30 flights on them so far on ailerons. fast, strong, good centering tho there has been some talk there are other brushless servos coming from Futaba specifically for ailerons

Woodie

What are the advantages of a brushless servo on a YS application, exactly? Just curious.

-M

These would work very well on a 2m ship for ailerons. There are some other brushless servos coming sometime fairly soon, although I really don't know of an exact date yet.

Arch

Futaba claims 30% faster speed, lasts 5 times longer than other servos, smoother
operation, greater resistance to jolts and vibration, same current draw as other
digital servos, etc, etc, etc.

tommy s

Here is a release from Futaba about their Brushless servos.

1. The brushless servos offer greatly improved response time over
other servos. Specifically, the response time on the brushless
servos has been decreased from 10ms to 7ms. This means that the
servos will react much, much faster to any control input.

2. Significantly increased life span. The new brushless servo
motors will last more than five times longer than servos that include
brushed motors.

3. Lower operating temperatures. As there are not any brushes on
the motor armature, there is no spark produced when the servo motor
is in operation. Thus, the temperature remains very constant within
the servo rather than increasing as they do in a brushed motor
servo.

Furthermore, thanks to the motor design, the outer coils act as a
heat sink dissipating any heat that does occur. As an added benefit,
Futaba is able to increase the torque or speed of the servos without
increasing the case dimensions.

4. Vibration & Shock. Unlike servos that used brushed motors, the
brushless servos from Futaba are less susceptible to the effects of
vibration and/or shock. While we don't want the modeler to abandon
the use of the servo grommets and rubber mounts, these servos are
simply less apt to experience difficulties from poor or improper
installation.

Additionally, the inertia of the standard motors also facilitates the
effects of vibration on the servo's performance. By eliminating this
inertia in a brushless servo, Futaba has reduced this possibility.

5. Power consumption. Brushless servos consume approximately the
same amount of power as their digital servo counterparts.

6. Centering. Centering is the same as it is with the digital
servos. The dead band is also equal to the digitals.

7. Case size. Brushless servos are the same as a standard-size
servo.

8. Increased resolution for smoother operation.

9. Samarium Cobalt magnet for better performance and increased
holding power.

10. Dual ball bearings.

Samarium Cobalt magnet

Wow i need to get a dozen. first a magnet. next a rare earth magnet. now a Samarium Cobalt magnet. Where will it end.
Which brings to mind what is a Samarium Cobalt magnet? And why is it better than a some other kind of magnet?

Anyways what's happening Arch?

Fantastic servo, been running them on the ailerons since September. Very tight gears (virtually no slop when new), and very smooth and accurate.

I noticed that Akiba was running them on elevator and rudder at the Worlds, so they would be good as an all purpose servo. I would choose these over anything else Futaba has at the moment.

I have some BLS 351's on the way but I doubt I will get to try them until spring now

I notice they are a little bit heavy compared to other digitals. What I would love to see is a mid sized brushless for the ailerons.

-Mike

Try this for openers: http://www.semiconassociates.com/pro...FTkjFQodBGD4-A

I cannot believe the wealth of info here on RCU that was one question i thought would never get answered. And get this the company that was listed has an address in Lexington KY.

If you can wait for a bit longer, Futaba will come out with more brushless servos next year designed specially for aileron, that's came straight from Naruke at the WC. However, the current 451 is good for rudder and ele. It's more or less like the first generation digital 9250, we used them on ail before the 9150 and 9154 hit the market.

Adrian

Is there a difference between brushless and coreless? I'm...ready for this???...clue-less!

BWAHAHAHaaahahahhahahhaaaaaa

Serious question though. 8-)

WEll then the order is placed!
thanks for answering guys

Is this a metal gear servo? How is the play after running awhile in an electric and a YS.

Hi,

I contacted Futaba support here in RCU, and they told me these servos are metal geared , like many of the todays high level servos.

Personally, i have not so good experience with metal-geared servos and YS ...
Generally; it is not any problem with the motor assy, but the gears and pots ....

Kjell Olav

i read on Futaba's site that the only one that in the spec talk about metal gear is the Futaba BLS351 Digital High Torque Metal Gear .
The 251 is a gyro servo ..maybe on elevator......and the 451 (that I orderd) has not this in the describsion...
I dont say that you have wrong Kjell.....but this is what i have found!

Check site
351 http://www.gpdealera.com/cgi-bin/wga...pgm?I=FUTM0551
451 http://www.gpdealera.com/cgi-bin/wga...pgm?I=FUTM0552
251 http://www.gpdealera.com/cgi-bin/wga...pgm?I=FUTM0550

Hi Rune!

... Yes ... i saw that also, that`s why i asked them to be specific about the 451- servo .... They said that only the first-gear was nylon, and the rest was metal ...

hmmm ,how to put a link in here ?? .... search on "bls451" and you find it ...

Kjell Olav

A picture is worth a 1000 words They look pretty metallic to me!

Brian, I cant speak to running them on glow but there is virtually no change in mine on electric.

In my personal opinion, this is one of the good things using electric powerplant ; they treat the equipment , like the servos nice A widely possebility to choose the hot stuff ...

Since i spend my time with the truly strokers, a will try a different route next time i choose servos for my next future project. A friend of mine, and a very skillfull F3A pilot have tried some cheap digital carbonate-geared JR servos ;and he felt that they was quite ok.

... fly and throw ...

Kjell Olav

http://www.futaba-rc.com/servos/futm0550.html

here is one more link ..
Kjell i saw what Krysta answered you...your right ..but I will try ...i have bougth them so ...i tell!

... Only one way to find out , these are for sure the hot stuff !

... My lady is moving in to me soon, besides she has birthday also !!! .... hmm, i guess i have to go to the jewelry instead [&:]

.... But daddy have already bought some electric- toys for playing outside my house, at the fotball-field. ( nannestad-hallen)


Kjell Olav

Here is the BLS 351, just came in today. Same super tight geartrain of the BLS 451, but with 217 in-oz @ 0.13s on 6V its stronger and almost as fast. Should make a superb replacement for the 9351, or 9155 on rudder applications.

Again all metal geartrain with the exception of the 1st gear which is nylon with a metallic pinion.

Unfortunately its -20c here and there is a fair bit of snow....so it will be a while before there is a flight report

just below 0 here ...but rain!

Clear blue sky, no clouds, very little wind, around 60-65 deg.
But.......stuck at work !!!

tommy s