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Old 09-02-2019, 01:00 PM   #11
HAL9KPCM
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Re: Servo power system for glow plane


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You can run parallel packs, but you would have to put in a device that isolates them from each other such as a battery buffer. It will isolate each battery in the event of a failure and you don't need to run matched packs. I run duals on my 800 class gas helicopters where the extra weight in the nose was beneficial for balancing, but just single packs on anything else.

In agreement with Len here on a 2500 pack. I get plenty of flying time on my planes and while I usually charge before each flying session, I have gone out on short notice without charging and there's still plenty of power.
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Old 09-02-2019, 01:04 PM   #12
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Re: Servo power system for glow plane

If you are using spektrum and want to use double batteries I would get a small powersafe receiver . I would think with your setup even one 700 would be good for a few flights if you want to use the receiver you have ,just watch it closely for the first few flights .
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Old 09-02-2019, 03:00 PM   #13
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Re: Servo power system for glow plane

I had almost the same set up in a small warbird: 2 X 700 MAh LiFE tied through a Smart-Fly BatShare.

https://www.smart-fly.com/batshare/BatShare%20Standard

Only specific is you would need to switch each battery on and off separately.

No longer need it so PM if interested.
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Old 09-02-2019, 03:06 PM   #14
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Re: Servo power system for glow plane

Yes, I forgot to mention about the separate switching between the battery and the sharing device. The Battery Buffer and the BatShare are the same type of device and do have a small current draw, so if there is no switch before the device, it will drain your battery.

I don't fly Spektrum, so totally forgot about the use of a powersafe receiver, that's another option.
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Old 09-02-2019, 03:14 PM   #15
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I guess the more things you add to the system the more things to go wrong...if the bat safe allows one battery to take over if the other one fails (without doing any harm) then it seems like a good idea. If that isn't how it works then it seems the better way to go is just a 2500mah single.
Sorry cougar429 I've used up all my private messages according to the notification every time I try to send one. So I couldn't pm you.
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Old 09-02-2019, 03:24 PM   #16
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Re: Servo power system for glow plane

That Batshare and the Battery Buffer draw from both batteries. It will draw from both simultaneously. If one battery fails or suddenly drops voltage, it's isolated from the system and your system runs from just the one battery.
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My Heli: Futaba 18MZ 2x(JR GSR260Z Sports FBL, Zenoah G26H, Futaba CGY750 Gyro, Futaba BLS-351 cyclic, BLS-251 tail, Futaba BLS-451 Throttle. Gryphon voltage regulator).
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Old 09-02-2019, 03:27 PM   #17
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Sweet!
Cougar you can pm me I can read it. I just can't send them. Thanks
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Old 09-02-2019, 04:45 PM   #18
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Re: Servo power system for glow plane

Strange. Never heard of a limit on outgoing PM's, just when your incoming is full.

Mind you, been here a while.

PM sent.
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Old 09-02-2019, 05:47 PM   #19
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Re: Servo power system for glow plane

Quote:
Originally Posted by HAL9KPCM View Post
That Batshare and the Battery Buffer draw from both batteries. It will draw from both simultaneously. If one battery fails or suddenly drops voltage, it's isolated from the system and your system runs from just the one battery.

Yeah spektrum power safe receivers work the same way without the need for all the extra connections , you don't even need switches . .
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Old 09-02-2019, 06:44 PM   #20
HAL9KPCM
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Re: Servo power system for glow plane

Quote:
Originally Posted by RAMJET View Post
Yeah spektrum power safe receivers work the same way without the need for all the extra connections , you don't even need switches . .
Ok, question because like I said, I don't use Spektrum, so I simply don't know. How do you get away without switching, because even with electronic switching, there will always be some form of drain.
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My Heli: Futaba 18MZ 2x(JR GSR260Z Sports FBL, Zenoah G26H, Futaba CGY750 Gyro, Futaba BLS-351 cyclic, BLS-251 tail, Futaba BLS-451 Throttle. Gryphon voltage regulator).
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