Best Vbar redundancy setup for larger jet plane

Hi,

Im looking for suggestions for the best Vbar redundancy setup for a larger jet plane.
It will be a 2,2m span airplane with 10 servos and a Jetcat engine.

Alt1:
Using a Vbar Evo with Remote-Antenna, Satellite-Receiver for VBar EVO and backup battery Power Backup Max.
Using the Evo gyro for stabilization.
An easy setup. But is it safe?

Alt2:
Powerbox system with two Neo´s, powerbox gyro and two battery setup.
Or 1 Evo with gyro output and Neo / Evo for redundancy. (Two Evo´s, Two Neo´s, One Evo and one satelitte receiver?)
Is it compatible?

Anyone with experience from such setup.
Any suggestions are very welcome.



1 mal bearbeitet. Zuletzt am 05.07.2026 22:59 von AlexanderSH.

Well - i would recommend not to have those powerboxes and 2 batteries ...

Does the JetCat Turbine have the integrated Alternator like mine on the Heli?
Is it capable (ECU) for 12V? (V12 is, V6 not)?
Are 12V servos installed?

I would do a simple solution with 2 VBar EVO (probably a RX Sat added to them if you would like 6 Antannas in the model), 2 100F Mikado Backup Buffers, some fast caps in addition and some Diodes on a plug instead any switch - so at least one large 3s lipo battery only.

Just like here on my Huey:

https://www.vstabi.info/forum/read.php?10,172594,page=8



regards (EN) / Gruss (DE)

Rainer Vetter

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1 mal bearbeitet. Zuletzt am 05.07.2026 23:10 von RV.

Hi Rainer,

Thx for your qiuck and proper reply.

No. The P100 has no generator. But have sent Jetcat a question about that.
The ECU is V.12. Planning for 6V servos from KST. X20-3005.

Yes. Seems like a clean double Mikado set up will do since the backup buffers makes good redundancy.
Must read me up on "fast caps and diodes".

Could also be interesting with a set up recommendation from the Mikado people.

Regards
Alexander

Hi

I have done and flown many jet aircraft for customers with only two Neos or two Evos. Works perfectly as long as you route the antennae properly ie away from other electronics and at 90 degrees per Neo/Evo. Use two 2S Lipos connected to the Vbars with no backups but never tried the VBackup on Vplane but it might be a consideration.

You are welcome to contact me for some macrocell examples.

Regards
Peter

VControl, VBar on all.
TDR, TDR2, TDF, TDS and TDSF
Peter

I would not use 6V Servos anymore. Also converted all my models to 12V last year. I recommend 8V types as minimum from todays point of view.

It is simple math - if you have a servo with the same output power (U*I), e.g. 30 Watt it takes:

- at 6V 30W/6V = 5A
- at 8V 30W/8C = 3.75A
- at 12V 30W/12V = 2.5A

So - also consider having 1Volt drop at 6V from BEC/Battery to the servo you will loose 17% of Power, at 8V 13% and at 12V only 8%.

So - having the same load / sheet data - the higher the voltage, the less current and the less effect of a voltage drop we have.

regards (EN) / Gruss (DE)

Rainer Vetter

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Posting and answering - please use a PC and a standard keyboard. Answer all questions fully, take the needed time, don't forget probably requested attachments.

Für Posts und Antworten bitte einen PC und eine richtige Taststaur benutzen sowie alle Fragen vollständig abarbeiten. Nehmt Euch Zeit, beantwortet Rückfragen in Ruhe und vollständig.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Für Einzelkommunikation bitte ausschließlich Email verwenden! - PN, Messenger, Chat usw. werden nicht bearbeitet.
For single user communication please send a email only! PM, Messenger, Chat etc. won't be read.

Very good Vinger,

Seems easy and redundant setup with Mikado without use of Powerbox system. Mikado has it all.
Would be very interresting seeing your macrocell setup.

And as Rainer explains regarding voltage. Its very interresting calculation favouring 12v systrem for less drain.

Thank you both for very good contributions.

Best
Alexander


Vinger schrieb:
-------------------------------------------------------
> Hi
>
> I have done and flown many jet aircraft for
> customers with only two Neos or two Evos. Works
> perfectly as long as you route the antennae
> properly ie away from other electronics and at 90
> degrees per Neo/Evo. Use two 2S Lipos connected to
> the Vbars with no backups but never tried the
> VBackup on Vplane but it might be a consideration.
>
>
> You are welcome to contact me for some macrocell
> examples.
>
> Regards
> Peter



Raiiner schrieb:
-------------------------------------------------------
I would not use 6V Servos anymore. Also converted all my models to 12V last year. I recommend 8V types as minimum from todays point of view.

It is simple math - if you have a servo with the same output power (U*I), e.g. 30 Watt it takes:

- at 6V 30W/6V = 5A
- at 8V 30W/8C = 3.75A
- at 12V 30W/12V = 2.5A

So - also consider having 1Volt drop at 6V from BEC/Battery to the servo you will loose 17% of Power, at 8V 13% and at 12V only 8%.

So - having the same load / sheet data - the higher the voltage, the less current and the less effect of a voltage drop we have.

regards (EN) / Gruss (DE)

Rainer Vetter