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HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsFutaba CGY › Power for Futaba CGY750 through a separate cable.
08-25-2017 10:28 AM  14 months agoPost 1
Div_73

rrNovice

Moscow, Russia

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Hello.
Sorry for my English.
I want to install FBL Futaba CGY750 on a nitro helicopter.
There is a sense in the organization of a separate power supply for the FBL?
That is, from one battery separately to supply power to the receiver and separately to the FBL.
Servos Futaba BLS275SV, Futaba BLS276SV, receiver R7008SB.
Wiring schemes in two ways.
I would like to clarify: connection Scheme 1 is more reliable than Scheme 2?
As it seems to me in the scheme 2, the weak link is the S.BUS wire between the receiver and FBL.
Or I'm wrong?

Scheme 1 by Igor Dryuma, on Flickr

Scheme 2 by Igor Dryuma, on Flickr

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08-25-2017 01:29 PM  14 months agoPost 2
ssmith512

rrKey Veteran

Indianapolis, IN USA

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I have 3 CGY750, 1 on a nitro. All are connected as SCHEME 2 as you show. No issues. My nitro has been running that way for 3 years.

Steve

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08-25-2017 01:48 PM  14 months agoPost 3
PaulBowen

rrKey Veteran

Victoria, Australia.

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I run a 2 output smart switch between the battery and the gyro and rx. Scheme 2 looks risky to me. If you attempted that with a BeastX and Savox servos on a nitro it would end in a steaming heap!

Futaba T18SZ, JR Propo XG14, Hirobo fanatic!

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08-25-2017 01:50 PM  14 months agoPost 4
Div_73

rrNovice

Moscow, Russia

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Servo Futaba BLS275SV (4 pieces.), Futaba BLS276SV.

By S.BUS cable current is about 10A. And that's a lot for such a thin cable. Correct me if I'm wrong.

Steve
Do you use a branded cable from Futaba, what is its length?

Igor.

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08-25-2017 02:49 PM  14 months agoPost 5
ssmith512

rrKey Veteran

Indianapolis, IN USA

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Steve
Do you use a branded cable from Futaba, what is its length?
Yes, I use the Futaba Sbus cable, red connectors on both ends. It appears to be a heavier gauge wire. Either 55mm or 67mm length.

Futaba BLS servos are well known for the low amp draw. I have always used Futaba BLS series servos. Also a well setup helicopter with smooth linkages will keep the amp draw to a minimum.

Steve

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08-25-2017 05:59 PM  14 months agoPost 6
Div_73

rrNovice

Moscow, Russia

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Steve,
thanks for the clarification.

If, these messages are read by the technical team of the Futaba, then it would be interesting to listen to their opinion. Yesterday I wrote technical support for futaba-rс.сom, but got the following answer:
We only handle distribution and service of Futaba products in North America and
Canada. Please see this web page http://www.futabarc.com/futdist.html to find
the distributor in your area who can answer your inquiries.

Sincerely,
Krysta
Product Development & Support Specialist
Futaba Services
Hobby Services
3002 N. Apollo Dr. Suite 1
Champaign, IL 61822
USA
Phone: 217 398-0007
I think that the answer to my question, for them is to be a matter of prestige.

Igor.

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08-25-2017 11:22 PM  14 months agoPost 7
JuanRodriguez

rrProfessor

The Villages, Florida

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If, these messages are read by the technical team of the Futaba, then it would be interesting to listen to their opinion.
I don't believe they do.....

Been there, done that and old enough to know better.....

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08-26-2017 03:55 AM  14 months agoPost 8
Dr.Ben

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Richmond, VA, USA

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You can split power between receiver and 750 by feeding any slot on the 750 via a Y harness EXCEPT Rev Sens (which instantly smoke the unit).
Futaba BLS servos consume scant power. An average nitro flight will consume barely 300 mah.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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08-26-2017 12:29 PM  14 months agoPost 9
Div_73

rrNovice

Moscow, Russia

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I prefer the connection option as per scheme 2. Any additional wires and connectors lower the reliability of the system.

Ben,
do I understand correctly that you are a representative from Futaba?

Can I be sure that if all the components (BLS275SV, BLS276SV) and the connecting wires are original from Futaba,
then the unpleasant moments will not happen?

IMG_1454 by Igor Dryuma, on Flickr

Igor.

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09-03-2017 01:48 AM  13 months agoPost 10
Dr.Ben

rrMaster

Richmond, VA, USA

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A single SBus lead will feed all the servos in your model just fine.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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