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Mar 19, 2019, 09:12 AM
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Neil Stainton's Avatar
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Discussion

New Blue Bird BMS-125WV Servo


The Blue Bird BMS-105HV has now been superseded by the BMS-125WV. This servo is suitable for all flying surfaces on most electric gliders.

The new BMS-125WV is based on the BMS-115HV which had redesigned gears, and also has new electronics, giving it a Wide Voltage range and allowing it to be used with 1S and well and 2S LiPo batteries.

The BMS-125WV has more torque than the already strong BMS-105HV, making it one of the most powerful small servos available. In addition Blue Bird make a BMS-126WV and BMS-127WV each giving up a little more torque for increased speed.

Currently we have them all in stock, see https://www.hyperflight.co.uk/produc...ue+Bird+Servos

Thanks for the bandwidth,

Neil.
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Aug 17, 2019, 08:44 PM
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Atomic Skull's Avatar
Is the case size/profile on these the same as the BMS-105HV and BMS-107HV? The listed dimensions are slightly different.
Sep 01, 2019, 05:44 AM
in awe of glide...
Kirkerik's Avatar
Will these be available in a horizontal lug for wings?
Sep 02, 2019, 11:24 AM
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Neil Stainton's Avatar
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Yes!
https://www.hyperflight.co.uk/produc...code=BMS-115HV
Sep 02, 2019, 12:52 PM
in awe of glide...
Kirkerik's Avatar
That is the HV version. Is there not a WV (wide voltage) version?
Sep 03, 2019, 06:28 AM
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Neil Stainton's Avatar
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No, sorry.
Sep 03, 2019, 09:02 AM
in awe of glide...
Kirkerik's Avatar
The BMS-115HV has a listed operating voltage of 6.0-8.4 V.

Is it safe to say I could run it on 1S Lipo voltage (3.8 V) in a pinch? I plan on a Schottky diode battery back up with a small 1s Lipo. If the BEC or flight pack fails, I'll have enough reserve power to bring it in safely. Most of the time I'll be on whatever V I set the BEC to.
Sep 03, 2019, 09:13 AM
in awe of glide...
Kirkerik's Avatar
In other words, what is the difference between the HV and WV versions?

Is it simply nomenclature? Or is there a fundamental difference in the hardware and/or electronics?
Sep 03, 2019, 09:37 AM
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Neil Stainton's Avatar
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I think there is a difference in electronics. You can test it on 3.8V and it it works okay for you then fine - hopefully you will never have to rely on the backup power supply.


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