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Mikado Logo 800 Xxtreme Mikado Logo 800 Xxtreme Helicopters Discussion


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Old 09-14-2012, 03:07 AM   #1 (permalink)
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Default Question about vbar, 2s power and servo draw

Il
L bet this has been asked Berle, but I could not find the answer

I think I'd like to go with a 2S flight pack. I have decided on the SAvox HV 2771 and 2772 servos, and I have two questions. This will be my first helinwith HV servos

1. Can the vbar full size run at 2s voltage? What about the satellites, or does vbar drop its voltage to power those?

2. What about HV servo amp draw going through the vbar? Is it up to that task, or is it better to use something equivalent to the skookum power bus or the gryphon regulator so the servo amp draw is not routed through the vbar

I really like the idea of keeping it simple. 2s straight in, no bus or regulator appeals to me


And f the vbar is up to the voltage and servo amp draw, should I run two voltage lines from the 2s flight pack to the vbar.
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Old 09-14-2012, 08:01 AM   #2 (permalink)
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Hi!

Vbar Handles 2s. Sattelites are OK.

I used 4 ("Four!!!") connectors into vbar/Receiver. I use sbus so plenty of unused Connections. Use a large and High C Rating 2s. Min 2500/30C. I use 4000/35c with 2 cables in the Receiver And 2 in vbar with 0.75mm2 thickness.

There is no Overkill on power supply.
1 savox is up to 10 Amp current during reversal. So 4 are up to 40 amps...1 servo connector can handle only 5A / 10 peak...

Greetings
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Old 09-14-2012, 10:12 AM   #3 (permalink)
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The V-Bar's internal power handling capability is up to the task. No issues.

We make a cable that goes from the 2S pack deans connector that transitions into two servo plugs, that then go into any available two ports on the V-Bar or receiver. Again, no issues.

We've used 2S packs between 1350mah and 1850mah with no problems. The only down side of course is that you must keep the packs charged

(-: Dave

Last edited by dahld; 09-14-2012 at 03:55 PM..
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Old 09-14-2012, 12:24 PM   #4 (permalink)
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Thanks for the info!

My maiin worry was that perhaps the vbar internal bud might not like those big amp spikes, ago thanks that's for putting those fears to rest.

I will make a connector like you suggest so vbar gets power through 2 connectors

Regarding flight pack status, I'll put an alarm. In that circuit so if the 2s power drops too low it will beep.
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Old 09-14-2012, 04:34 PM   #5 (permalink)
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Quote:
Originally Posted by nebuchadnezza View Post
Hi!

Vbar Handles 2s. Sattelites are OK.

I used 4 ("Four!!!") connectors into vbar/Receiver. I use sbus so plenty of unused Connections. Use a large and High C Rating 2s. Min 2500/30C. I use 4000/35c with 2 cables in the Receiver And 2 in vbar with 0.75mm2 thickness.

There is no Overkill on power supply.
1 savox is up to 10 Amp current during reversal. So 4 are up to 40 amps...1 servo connector can handle only 5A / 10 peak...

Greetings
I too use (4) connectors. I fill every open spot with power NO CHANCE of a current lack
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