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Ribble Valley Model Helicopter Club - Forum > General Category > Helicopter & Plank News > Futaba BLS Servos Officially Rated To Run At 7.4V
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Author Topic: Futaba BLS Servos Officially Rated To Run At 7.4V  (Read 36 times)
TinTin
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« on: July 29, 2010, 10:03:53 AM »
Futaba BLS servos have been officially rated to run at 7.4V by Robbe?
* Technische_Daten_Servos_2010.pdf (83.01 KB - downloaded 6 times.)
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The Shadow
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« Reply #1 on: July 29, 2010, 10:14:02 AM »
Have they launched new servos or are they saying that all BLS servos will run at 7.4V including the BLS 251 tail servo.
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TinTin
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« Reply #2 on: July 29, 2010, 11:01:47 AM »
No. The BLS 451 & BLS 351 will run at 7.4V but the BLS 251 will only run at a max of 6.0V. Look at the pdf file!!!
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« Reply #3 on: July 29, 2010, 11:11:06 AM »
I have just bought 3 x bls 253 and 1 x bls 251 to go in my Henseleit Three Dee Rigid and as I understand it these ones are max 6v


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Harry
TinTin
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« Reply #4 on: July 29, 2010, 11:24:37 AM »
According to the Robbe PDF file, the 253 can be run at 7.4V.

Futaba rate them at 6V meaning to run on a 5 cell Nicad. But a fully charged Nicad is never at 6V, more like 7.4V!!!
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« Reply #5 on: July 29, 2010, 11:43:27 AM »
There is always a difference in nominal and fully charged voltages and these are normally taken into account by the manufacturer. If the new servos are designed for a 2 cell lipo then the peak voltage they have to handle is 8.4V about the same as a 6 cell nicad (7.2 nominal, 9V peak).
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TinTin
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« Reply #6 on: July 29, 2010, 11:47:44 AM »
I'm running my BLS351's at 6.8V through my voltage reg.
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