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GrandRC . CanoMod . Futaba-RC

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Radio - Servo - Gyro - Gov - Batt > BLS451 Glithing
 
 
tchavei
rrProfessor
Location: Portugal

Update:

My friend sent two servos back under warranty. Got two new ones and these don't glitch.

Btw, before he sent them, we did a test at the field (kinda stupid though) where we spooled up the bird on the ground without blades attached. A revmax was used to keep the engine rpm under control and let me tell you... those pitch/ail servos were moving like 15 degrees to each side at a high pace on their own?!? Looked like parkisons

Tony


--------------------
"Perfection and patience usually walk side by side..."
02-13-2008 05:57 AM
HOMEPAGE  
 
 
baddraptor
Elite Veteran
Location: valencia, ca- usa

Quote 
those pitch/ail servos were moving like 15 degrees to each side at a high pace on their own?!? Looked like parkisons

Sounds like futaba is trying to make crack rolls easy, whats the problem..

**Unattended children will be givin a shot of espresso and a puppy**
02-13-2008 06:12 AM
 
 
WhirlyBird500
Senior Heliman
Location: Rhode Island, USA

Latest update.

I had a couple MSA-10 synchronizers lying around. Because these have a separate power input I decided to see if the receiver was having a problem with the amount of current it could handle. When I plugged the battery into channel 7 everything worked fine, I guess a shorter bus for the power to run on. When I ran power to the synchronizer the glitching went away. I think the R127DF has a problem with higher currents on the bus. I replace a Hitec servo I used to trouble shoot with back to the BLS-451 I removed. All is well when I use the MSA-10. SO I have a new receiver on its way. Thanks all for your help.
02-26-2008 03:13 PM
 
 
Jay1
Veteran
Location: Colorado Springs

Very interesting read here.... Now has anyone tried this on the spectrum recievers to see if they get the same results?

I was thinking of building a new bird with these servos but not if they have this issue also.

Jay
Sooner or later, Gravity will win!
02-26-2008 03:19 PM
 
 
hootowl
Elite Veteran
Location: Garnet Valley, Pa.

I'll be running all BLS on the 2.4 R6014FS receiver on my Stratus. If I have a problem I'll let you know.

Actually I have a FUT 309DPS that I may have to use in the interim since it's taking Futaba forever to cough up the next batch of 2.4 stuff.

"Any man who says he is an American, but something else also, isn't an American at all.
02-26-2008 03:29 PM
HOMEPAGE  
 
 
Jay1
Veteran
Location: Colorado Springs

Thanks Hoot...


Hey I was looking at your gallery and I am a little disapointed that I did not see a window open with Runryder on your CAD picture???

Jay
Sooner or later, Gravity will win!
02-26-2008 04:25 PM
 
 
hootowl
Elite Veteran
Location: Garnet Valley, Pa.

Shoot you don't even see the browser up.

"Any man who says he is an American, but something else also, isn't an American at all.
02-26-2008 04:59 PM
HOMEPAGE  
 
 
Shiro Muji
Senior Heliman
Location: Japan

I've been using BLS351 with my X9303 radio with no problem. The servo is really powerful and fast. It is not power-hungry also

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper
02-26-2008 11:36 PM
 
 
Captain Crazy
Senior Heliman
Location: Wakefield, England

Jay1 - i have 3 451's on dx7/ar7000 in my 600 pro, work perfectly and never had any issue.Very nice servo's.

http://www.horburyhelicopterclub.co.uk/index.html
02-27-2008 07:13 PM
 
 
lfalsetto
Veteran
Location: COLORADO

Chalk another wreck upto the BLS servo's. This time we had the Trex 600n on a data recorder. Got a spike in voltage and the servo's just locked out. Luck only 6 feet off the ground but cost of blades and boom. 6 flights flawless yesterday 2 flights today started twitching on first flight landed and checked everything was tight so on a short hover they stopped working. Battery checks fine still 7.2 v on an Align 2 in 1 (with glow driver) Hopefully Futaba will honor the servo's they are dead now.
Not a voltage spike an amperage spike, Edited
03-05-2008 01:42 AM
HOMEPAGE  
 
 
tchavei
rrProfessor
Location: Portugal

jeez...

My friend got two new ones (replaced under warranty) and they didn't gave a problem yet...

Tony


--------------------
"Perfection and patience usually walk side by side..."
03-05-2008 01:46 AM
HOMEPAGE  
 
 
Dr.Ben
Elite Veteran
Location: Richmond, VA, USA

How high was that voltage spike?

Ben Minor
03-05-2008 01:57 AM
 
 
turboomni
Elite Veteran
Location: 63 Rambler Down By The Dumpster

I am running 3 BLS451,s on my Raptor 50 with a JR 9303 2.4 with no problems so far. Very nice servos . We shall see!

Setup is everything, All my heli's can fly better than I can pilot them
03-05-2008 02:34 AM
 
 
lfalsetto
Veteran
Location: COLORADO

It really wasn't a voltage spike it was an amperage spike. If I can figure out a way to post the graph I will.
03-05-2008 03:20 AM
HOMEPAGE  
 
 
Angelos
Key Veteran
Location: nr Oxford, OX11, UK

A friend at the club had one go full travel causing the heli to roll. It still does it every time you power it on and I suspect it has a faulty pot. Perhaps brushless motors are more reliable but the pots always fail first and in this case certainly prematurely. The glitching that some people reported could also be accounted to a faulty pot.

-Angelos

Spartan RC R&D - Visit us at our local club www.helicollective.org.uk
03-05-2008 01:01 PM
 
 
krysta
Heliman
Location: Champaign IL

BLS451 Glitching

Whirlybird,

The BLS451 is designed by Futaba for use in Nitro or Electric cars, they are not precise enough for the demands of heli flight.

The only brushless servo we offer at the moment for heli use is the BLS251.


Sincerely,
Krysta
Product Development & Support Specialist
Futaba Service Center USA
03-05-2008 03:38 PM
 
 
hootowl
Elite Veteran
Location: Garnet Valley, Pa.

What does "not precise enough" mean technically?

"Any man who says he is an American, but something else also, isn't an American at all.
03-05-2008 03:40 PM
HOMEPAGE  
 
 
tchavei
rrProfessor
Location: Portugal

I'm not going to comment this but hey, she's right... they were made for car use, not helis so if they happen to fail on a heli, its your problem

Tony


--------------------
"Perfection and patience usually walk side by side..."
03-05-2008 04:08 PM
HOMEPAGE  
 
 
lfalsetto
Veteran
Location: COLORADO

Well we checked everything out. Looks like the 2 in 1 was dropping voltage down too low. The servo's all work fine. Don't know maybe they need a specific voltage to operate.
03-05-2008 04:11 PM
HOMEPAGE  
 
 
WhirlyBird500
Senior Heliman
Location: Rhode Island, USA

Krysta,

Not to start anything. You need to see you own web page then. Either you need to correct your web page or the above statement. The Futaba web page clearly states for AIR and Surface use. So please decide which is correct. I will be happy to send mine in to be replaced seeings how the Futaba web page lead me astray.


Use the form below to find the best servos for your application.
Voltage Type Size Torque Speed Use
Select one:
4.8V
6.0V
Select one:
Digital
Standard
Select size:
Micro
Mini
Mid
Wing
Sail
Standard
1/4 Scale
1/5 Scale Enter minimum
value (oz-in):
Enter maximum
value (sec/60°):
Select one:
Air
Surface
Servos that match your request:
4.8V; Digital; Standard size; 100 oz-in or greater torque; Air;
Stock Number Name Type Size Torque Speed Weight (oz) Use
FUTM0211 S9151 Digital Standard 131.9 0.19 1.8 Air
FUTM0212 S9152 Digital Standard 222 0.24 3 Air
FUTM0213 S9153 Digital Standard 167 0.19 3 Air
FUTM0215 S9155 Digital Standard 153 0.16 2 Air
FUTM0225 S9255 Digital Standard 112 0.17 1.9 Air / Surface
FUTM0235 S9350 Digital Standard 111 0.15 2.1 Air / Surface
FUTM0551 BLS351 Digital Standard 155 0.16 2.2 Air / Surface
FUTM0552 BLS451 Digital Standard 111 0.14 2 Air / Surface

Edit:

Not to mention that the BLS251 is far too low on power for the applications most people here are running them on. There are alot of guys like myself that would bot use those on a 50 sized that is put through hard flying like 3D. Most of us are putting the 451's on 90's. This is can lead a lot of people to some very bad advice.
03-05-2008 04:13 PM
 
 
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Radio - Servo - Gyro - Gov - Batt > BLS451 Glithing
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