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Author Topic: Electric flight batteries suggestions needed  (Read 598 times)
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BigR
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« on: December 31, 2017, 12:32:06 AM »

Hi All,

Getting back into flying my electric Nostalgia plane. My batteries are old and tired. What is the hot setup today for batteries? I'm using a 2826 2200kv motor, pulling close to 30 amps on a 3s battery. Good brand to use? Thinking of the Dynogy 800 65 C. Was using Nanotech 850s but they haven't stood up over time.

Thanks,

John in Kalifornia
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Yak 52
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« Reply #1 on: December 31, 2017, 06:11:22 AM »

Can you provide more details of the plane? The size, weight and style of flying will dictate power system choices.

The 2286-6 on 3S is a pretty hot set up commonly used on 'park jet' models. It will put out over 300W and 700-800g of thrust and fly fast on a smaller high pitch prop. The 3S 800 battery looks a bit small to me. A 3S 1800-2200mah is more common for the park jet set up.
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BigR
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« Reply #2 on: December 31, 2017, 03:51:49 PM »

Plane is a Top Banana for Nostalgia. The motor run is only about ten seconds or so. Running a 7x4.5 folder for a bit under 300 watts, that is with a good low IR battery.

Test results from 10 miinutes ago, freshly charged batteries:

Dynogy 600    289 watts
Another Dynogy 600   203 watts
Nanotech 850   234 watts
Ezflite 1300   340 watts
Zippy 2200  343 watts

I fear that the "park jet" R/C model analogy isn't apt in this case. We are talking free flight, with weight a factor.

What is used on the Big Dog? Chime in here you electric competitors.

Thanks,

John in Kalifornia
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Konrad
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« Reply #3 on: December 31, 2017, 04:33:22 PM »

Hi All,

Getting back into flying my electric Nostalgia plane. My batteries are old and tired. What is the hot setup today for batteries? I'm using a 2826 2200kv motor, pulling close to 30 amps on a 3s battery. Good brand to use? Thinking of the Dynogy 800 65 C. Was using Nanotech 850s but they haven't stood up over time.

Thanks,

John in Kalifornia
And that is the problem nothing will stand up to that load unless you want to carry excess weight. I've had good luck with the Dynogy brand in my EF-1.
But for your application where you are looking for hang time weight is a concern.
https://www.dinogylipos.com/collections/3s-lipos/products/450mah-3s-65c-deans

Or something like these.
http://www.thunderpowerrc.com/FPV-BATTERIES/FPV-Adrenaline/TP450-3SA70J  Unfortunately the leads and the Connector should be changed.
But again they don't last long at that power

I'll be looking into a similar power system for my F3-REST 2 meter. So please let us know what you come up with.
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Cut it twice and it's still too short!
Yak 52
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« Reply #4 on: January 01, 2018, 05:25:25 AM »

Was using Nanotech 850s but they haven't stood up over time.

What C rating were the Nanotechs?
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Scottl0413
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« Reply #5 on: January 01, 2018, 05:48:33 PM »

John, as far as pwr. system on the Big Dawg is concerned I've been flying with a 1000 mah, 65c, 3 cell Genius battery for the past 3-4 years and also have been successful with the Nanotech of the same specs. Motor is a Cobra 2217 at 2300 kv, 30 amp control, with an APC 8 x 4 fixed gas prop. Esc is programmed for a soft start. An 850 mah, 65c, 3 cell should do the job also.

Scott
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