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HelicopterTurbine Helicopters › 2 cell lipo for ECU?
12-28-2008 04:00 AM  8 years agoPost 1
Dakine

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OC, Commifornia

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Is it ok to run a 2 cell 4400 mah lipo pack for the Jetcat ECU as opposed to the 6 cell nicads?

Thank you

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12-28-2008 05:02 AM  8 years agoPost 2
mcfast

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Quebec Quebec Canada

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They are not recommended !

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12-28-2008 05:21 AM  8 years agoPost 3
adminaeg

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Charleston, SC

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I was thinking of running lipos on my ECU also. Can someone explain why they are not recommended? Duralite produces a package that uses 7.4v li-mn on the ECU.

Aastan
http://www.runryder.com/helicopter/t478025p1/"

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12-28-2008 10:30 AM  8 years agoPost 4
mcfast

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Quebec Quebec Canada

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Lipo have combustible chemistry and are not impact tolerant, and ones the voltage gets be-on a certain point they fall flat real fast and are shoot, good for the garage, but Duralite Li-Ion are recommended they do not have those problems, also you can use A123

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12-28-2008 12:06 PM  8 years agoPost 5
Peter Wales

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Orlando Fl

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Don't we get some garbage on here!

Jetcat have a setting in the ECU for LiPos. If you have one of the later ECU's then go into the menu for turbine limits and you can set it up to use LiPos.

Peter Wales
http://scalehelicopters.org

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12-28-2008 02:00 PM  8 years agoPost 6
dazzaster

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right next door to​hell

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yes they arre not good on impact but then what is?
not sure if its the same on jetcat but on the wren the only warning ive heard about lipos is do not charge them while conected to the ecu or through the ecu as this may damage the ecu, that said all my lipos are charged out of the machine.

A.K.A 509

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12-28-2008 04:08 PM  8 years agoPost 7
mcfast

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Quebec Quebec Canada

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IT IS NOT GARBAGE!

On my JetCat I have the LiPo option, so I installed LiPos and burnt out the ECU, maybe it was not because of the LiPo, but when I phone JetCat USA they toll me "THAT LiPo ARE NOT RECOMMENDED BY JetCat!"

I can only go by what hapen to me and what JatCat toll me
But you do what you what to do, it's on skin of my nose!
Just trying to help.

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12-28-2008 04:22 PM  8 years agoPost 8
adminaeg

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Charleston, SC

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Mcfast,

I understand where you are comming from and I don't dispute your experience. My issue now is with JetCat. Why offer a lipo option on the ECU and then state that lipos are not recommended.

Aastan
http://www.runryder.com/helicopter/t478025p1/"

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12-28-2008 04:46 PM  8 years agoPost 9
dazzaster

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right next door to​hell

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it is strange as ive just read a jetcat manuel on line and it states that its power is supplied by a 6cell battery (i asume nimh) it then states you can use a 2 cell 7.4v lipo
and then in bold it says v6.01 or newer versions of the ecu defult to lypo.
i am guessing that you have tell the ecu to except the lipo either that or you fried your ecu by chargeing the battery while still conected? something jetcat also say not to do.

A.K.A 509

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12-28-2008 07:09 PM  8 years agoPost 10
Dakine

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OC, Commifornia

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Thanks for all your info!

I'm not too concerned with whether the lipos will catch fire either from impact or when charging. I already understand the inherent danger characteristics of lipo's. I'm more concerned about whether the output voltage will burn the ECU in normal operation. From my experience with Lipo's, it puts out very consistent output voltage, from beginning to end. Obviously, there's always going to be a voltage drop off once you exceed its capacity.

Common sense (or knowledge) would dictate that I'd charge the lipos separately out of the helicopter. Also, I would never charge the lipo packs while it is connected to the ECU.

That said, my original concern was whether or not Jetcat's ECU could handle the consistent output voltage by a 2 cell lipo pack. Because lipos has more consistent voltage output, it may create more heat. On the other hand, because of its efficiency (lipo's consistent voltage output), the ECU may draw less voltage and thus, less heat to the ECU. And thus, may question and concerns.

I trust voltage output more from lipos than NiCads or NiMH. I would prefer using lipos.

Thanks

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12-28-2008 07:25 PM  8 years agoPost 11
dazzaster

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right next door to​hell

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Common sense (or knowledge) would dictate that I'd charge the lipos separately out of the helicopter. Also, I would never charge the lipo packs while it is connected to the ECU.
please excuse my coment about charging lipos in the heli but despite being common sense there are still peps that would charge lipos in there machines, and as i dont know you hence i ask about charging the lipos.

if jetcat say its ok to use in there manuels then provided youve selected lipo usage then there should be no problem. if there is a probelm then i would call them again if they still say its ok get it in writing to cover your own back.

A.K.A 509

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12-28-2008 09:19 PM  8 years agoPost 12
human213

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malibu

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Charging and lipo ECU set up

The jetcat works perfectly with the lipo setting.

I am running two parallel lipos, and my radio lipos also
supply the ecu...(two 8000mah packs)

Be sure to make a low resistance connection, mpx or similar connector,
with all leads soldered in well, if you are not using the stock
connection. Also try to shorten the lead or at least not run
additional length, as the resistance matters, and significant
amperage, over 30 can occur on worst case start up.

You can safely charge the packs connected, charger and amperage dependent. The ramp up of the electronics matters, and follow manufacturer if you are using a different set-up. I only charge with
the batteries in the machine. You must have a fail safe method of
assuring correct charge voltage settings, and my orbit chargers give that each use. Also, I use the ultra high quality built in hard wired to the board mpx balancing connector on high quality lipos. I am using emcotec dual balancing cables, works flawlessly; over 22 gallon through my spt5.

m

Not everything that can be counted counts, and not everything that counts can be counted.

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12-29-2008 03:13 AM  8 years agoPost 13
Dakine

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OC, Commifornia

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dazzaster,

No problem at all!

Thanks for all additional info as well.

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12-29-2008 01:16 PM  8 years agoPost 14
Peter Wales

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Orlando Fl

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I hope this is the Cuatro you are talking about and not the 135. The ECU in the 135 is old enough to get damaged by using a LiPo as Mcfast says. If you want to use a LiPo in the 135 get a new ECU, dont upgrade the old one.

Peter Wales
http://scalehelicopters.org

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12-30-2008 12:31 AM  8 years agoPost 15
seattle_helo

rrKey Veteran

Seattle, WA USA

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I recently sent my ECU in to have it updated. Bob knew I was using a huge 10,000mAh NiMH for my ECU and reminded me to change the battery setting back to the 6-cell (NiCd/NiMH) option since the latest update now defaults to LiPo. What I didn't ask and I'm curious about now is if the update is more than just firmware and they change some internal component(s) as well.

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12-30-2008 02:15 AM  8 years agoPost 16
Dakine

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OC, Commifornia

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Peter,

It's not the 135. Also, it's been so long since I've flown the Cuatro, I forget how to fire her up . She's got the 2 stage turbine.

The Jetcat ECU on the bird to my original lipo question has got V 5.0. Is this too old to use lipo? It's the older Jetcat single stage turbine.

Thank you

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12-30-2008 02:57 AM  8 years agoPost 17
Peter Wales

rrElite Veteran

Orlando Fl

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Tony, I would send it to Bob And ask him to update it to v6.01 or whatever the latest release is. I dont think the v5 can take a LiPo but even if it can, there are advantages to upgrading it.

Peter Wales
http://scalehelicopters.org

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12-30-2008 03:23 AM  8 years agoPost 18
Dakine

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OC, Commifornia

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Will do Mr. Wales .

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12-30-2008 08:12 PM  8 years agoPost 19
Richard

rrVeteran

Scottish Borders,​U.K.

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My ECU is ver 5 and is set to use Lipo. I have been using Duralite batteries for 3 years. One on the ECU and twin Duralites on the Rx via Powerbox Gemini and never take them out to charge.

Oh **** ! this is going to be expensive?

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12-30-2008 09:02 PM  8 years agoPost 20
Peter Wales

rrElite Veteran

Orlando Fl

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There you go. Exactly which V5 do you have Richard, I think there were several.

Peter Wales
http://scalehelicopters.org

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HelicopterTurbine Helicopters › 2 cell lipo for ECU?
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