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08-07-2007 02:01 PM  10 years agoPost 1
jamesmac

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Edinburgh

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Would Futaba S9255 sevos be ok to use on the XLV? [4 x 90deg]. Vario recommend 9206's with slightly more torque.

Your thoughts?

Jim

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08-07-2007 03:34 PM  10 years agoPost 2
Speedbird370

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Sweden

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I would not use anything with less torque then 4 Futaba 9351 in the XLV for cyclic control,
it takes some power to shift those big main blades,
and be sure that you have a power supply for the servos that is up to the job,
like for example, an Emcotec box with 2
Flight Power 3700 mAh 7,4 v LiPo packs connected to it…

/Perry

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08-07-2007 05:01 PM  10 years agoPost 3
fredd

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I think you would only need very strong servos if you start during accrobatics. I believe 9255 are great servos for this type of heli. I agree with Emcotec power distribution. For batteries, 2800MA powerbox are the easiest Lipos to handle. No need to remove them when charging and just recharge with the supplied mains charger (like with your mobile phone...).

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08-07-2007 07:12 PM  10 years agoPost 4
jamesmac

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Edinburgh

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I don't intend to do accrobatics, so I'm quite happy sticking with the 9255's I've ordered.

As far as power is concerned, I was going to just fit an I4C Products servo isolator and 1 batt for Rx and 1 batt for servos. However, I'm interested to learn more about the Powerbox system or some method of power regulation. Does a powerbox supply Rx power also?

I have always been more in favour of NiCads, are there any pitfalls using Lipos? Can you suggest a uk supplier of the 2800MA powerbox system?

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08-07-2007 09:35 PM  10 years agoPost 5
Speedbird370

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Sweden

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I don't intend to do accrobatics, so I'm quite happy sticking with the 9255's I've ordered.

As far as power is concerned, I was going to just fit an I4C Products servo isolator and 1 batt for Rx and 1 batt for servos. However, I'm interested to learn more about the Powerbox system or some method of power regulation. Does a powerbox supply Rx power also?

I have always been more in favour of NiCads, are there any pitfalls using Lipos? Can you suggest a uk supplier of the 2800MA powerbox system?
The XLV is not an acrobatic heli at all,
but it can still benefit from having strong servos on the cyclic,
it makes the controls feel so nice

Below is a quote from hazchem88
he’s XLV build thread can be found in the e-Electric Conversions forum here on RR
OK, post flight check.

It's good job I kept the first flight very short. There are a few nuts that worked loose.
So I applied more locktight and tightened the bolts.

But big shame, you are right Perry, the S9252 servos VARIO RECOMMEND do not appear to be strong enough.
It looks like the 2 aileron servos have stripped gears.

Perry, are you using 4x 9351 - maybe I need those.

Not sure why vario say use s9252 when these will barely make a hover before they are destroyed.
Yes, the Powerbox also supply’s the RX with power,

Regarding the benefit of LiPo:s
If you think charging all the time is fun go with the NiCd:s
or get a generator on the heli
if you decide to go the LiPo way you can fly all day

/Perry

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08-07-2007 09:50 PM  10 years agoPost 6
jamesmac

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Edinburgh

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Thanks Perry,
I know what you mean about charging NiCads all the time, I have a 2400MAh Nicad on my Benzin Trainer [servos] and it has very limited flight time.
Just been looking at the Duralite Products, they seem to offer some good solutions. Have you used their stuff?, would a Powerbox be over the top for this application?
My XLV will have a Wren turbine power plant, ECU needs reliable power also.

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08-08-2007 08:13 AM  10 years agoPost 7
hazchem88

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W.Mids UK

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I used S9206 on my XLV - 2 of them broke within 2 minutes of gentle hover!

I have ordered S9156 to replace them with

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08-08-2007 08:16 AM  10 years agoPost 8
hazchem88

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W.Mids UK

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BTW, in my post on E-conversions I mentioned S9252, I used S9206!
I confused them with S9252 that I use in my Chinook project!

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08-08-2007 09:28 AM  10 years agoPost 9
jamesmac

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Edinburgh

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Servos and Power

That's interesting, looking at the torque of these servos [9156-272oz], [9206-132oz] and [[9255-112oz], I think I will go with the 9156, looks good for this application and piece of mind.

Perry, I have been looking at the Emcotec boxes, their stuff looks quite good. Would you suggest a 3rd battery for the Fadec ECU? or take an un-regulated feed from the box [I beleive that is poss].

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08-08-2007 03:33 PM  10 years agoPost 10
Speedbird370

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Sweden

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Servos and Power

That's interesting, looking at the torque of these servos [9156-272oz], [9206-132oz] and [[9255-112oz], I think I will go with the 9156, looks good for this application and piece of mind.

Perry, I have been looking at the Emcotec boxes, their stuff looks quite good. Would you suggest a 3rd battery for the Fadec ECU? or take an un-regulated feed from the box [I beleive that is poss].
Yes go with the 9156 servos and an Emcotec box, then you know you have the power

if I remember right the Fadec is powered by an 3s LiPo ( 11,1 V )
and the Emcotec box uses 2s LiPo 7,4 V
use an separate accu for the ECU, 3000 mAh or larger

/Perry

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08-09-2007 04:26 PM  10 years agoPost 11
jamesmac

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Edinburgh

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Duralite Gemini

Guys,

What's your thought on the Duralite Gemini system and their Lithium Manganese 3800MAh packs?. I was toying with the idea of using the Gemini unit with 2 x 3800 packs and a third 3800 pack for the ECU.

Jim

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08-21-2007 08:43 AM  10 years agoPost 12
DKTekrrVeteran - Melbourne, FL-USA - My Posts: All  Forum  Topic

I have a Gemini but I've been too buisy out of town to do the maiden test flight.

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