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Mar 01, 2012, 10:52 AM
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jhorton's Avatar
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Discussion

HS-65MG's on 2S lipo BEC


I am running 2 cell lipo on my larger planes that are running HV servos like HS-7245MH. My question is I'm wanting to run a seperate 2 cell lipo on my HS- 7955 and also on HS-65MG, will these servos work without having to run this through a BEC?
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Mar 01, 2012, 11:15 AM
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grumman5277's Avatar
I referenced them on servocity.com.They are both 6v servo's,or at least that is what information is available.

You can still use the 2 cell but need a BEC.
Mar 01, 2012, 01:04 PM
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jhorton's Avatar
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Indeed sir; it shows 6 volts on the Hitec Site, that is why I was asking if anyone out there is running on 2S LiPo and what results are they getting. I was really hoping that maybe Mike or someone from HiTec might see this and reply.
Mar 01, 2012, 02:00 PM
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Quote:
Originally Posted by jhorton
I am running 2 cell lipo on my larger planes that are running HV servos like HS-7245MH. My question is I'm wanting to run a seperate 2 cell lipo on my HS- 7955 and also on HS-65MG, will these servos work without having to run this through a BEC?
Do not ever run any servo on 2S unless they are rated HV by manufacturer.
Hitec HS-65HB & MG specifications - Use with BEC. (HS-65 repair/maintenance)
HS-7955TG Specifications (7955 can be run 2S as in interesting related thread with answers by Brendan Lugo)
As recently posted adjacent thread:
Hitec - General Servo FAQ
"Q. What is the input voltage range for my Hitec Servo?
A. All Hitec servos can be operated within a 4.8 - 6V (4 or 5 cells) range.
Only the HS-50 & HS35HB operate exclusively at 4.8 volts (4 cells).
Be aware that "coreless" and digital servos often perform poorly when alkaline batteries are used."


Whilst a number of modellers are using unregulated LiFe and enjoy the increased speed
and power (besides higher current draw) which do result in a reduction in servo life,
(No different to driving your motor vehicle at top speed continuously) many use a
5A to 10A switchmode regulator set to 5v, 5.5v or 6v. This as LiFe cells hold
that higher voltage, whereas a 5 cell NiMH drops to a lower plateau quite quickly.
Caution, LiFE are not all as labelled; see below.

Previous related threads:
. Servo - Operating Voltage Range - (Hitec) usuage with NiMH, Lipol & A123 batteries.

. Optima Transceiver (RX) - Battery set up for Nitro/Gas models - caution re NiMH & Alert re LiFE.

. Receiver packs . Why not LiFePO? (= largest RCG Thread)

. Digital Servo - Burnout. Cause & Prevention might also assist.

Alan T.
Alan's Hobby, Model & RC FAQ Web Links
Last edited by A.T.; Mar 01, 2012 at 02:18 PM.


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