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HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › BLS451 ok on 5 cells?
05-14-2011 10:04 PM  7 years agoPost 1
MartyH

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USA

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Futaba provides specs for the BLS451 at 6.0V so does that imply it can handle 5 cell NiMH?

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05-15-2011 04:51 AM  7 years agoPost 2
Dr.Ben

rrMaster

Richmond, VA, USA

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Given its tolerance of 2S lipo, 5S NiMH/NiCd should be no issue.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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05-15-2011 12:56 PM  7 years agoPost 3
MartyH

rrProfessor

USA

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Wow. 2 cell unregulated? If that's the case then like you say, I can stop even thinking about.

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05-15-2011 02:39 PM  7 years agoPost 4
Dr.Ben

rrMaster

Richmond, VA, USA

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Yeah, find something else to ponder

Though the voltage is nowhere near as stable as a LiFE pack, a 5 cell NiCd is kinda sorta mostly in the same average voltage range, and we know those packs are just fine with the nonHV BLS cyclic servos.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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05-15-2011 06:55 PM  7 years agoPost 5
Four Stroker

rrElite Veteran

Atlanta

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Well how about the BLS 254 ?

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05-16-2011 05:35 AM  7 years agoPost 6
gorn

rrElite Veteran

Western Australia

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all tail servos, max unregulated voltage sustained would be about 5.4v.
Same for regulated.
At 6v or higher sustained, all bets are off, however they will work for a while.

For the love of the hobby

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05-16-2011 03:16 PM  7 years agoPost 7
Four Stroker

rrElite Veteran

Atlanta

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Well Robbe says 6 V is OK for the BLS 254 but it is not really clear if that means 6.0 volts or a 5 cell pack. But I guess it depends on your gain, installation and flying. I was just inquiring if anyone has done that.

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05-17-2011 01:15 PM  7 years agoPost 8
Machinehead01

rrVeteran

Lower Michigan

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The 6.6 life packs...
Work great unregged. I have a 520 gyro, BLS251 unregged 2100 mah pack, no issues. Stupid fast tail.

Tom

"You judge according to the flesh; I am not judging anyone."

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05-17-2011 01:35 PM  7 years agoPost 9
Dr.Ben

rrMaster

Richmond, VA, USA

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It depends more on gain and the heli than anything else. A smooth model and rational gain will often yield a servo which runs no hotter on 6V than it did on something in the 5's. THEN I've seen cases where vibration, high gain, and hard flying can come together to get a servo scary hot. That's kill any servo, even a BLS servo, in short order.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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