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Author Topic: Battery too Heavy  (Read 1103 times)

Offline Motorman

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Battery too Heavy
« on: August 15, 2019, 07:29:37 PM »
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« Last Edit: August 31, 2021, 06:28:08 AM by Motorman »

Offline William DeMauro

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Re: Battery too Heavy
« Reply #1 on: August 19, 2019, 08:57:22 AM »
What 6S battery do you have? What motor do you have? Most of us that are using 6S use the Thunderpower Prolite 2800 6S.  If you go to a 5 cell you will have to up the capacity in most cases (Maybe like a 5 cell 3000-3300 ?) and raise your motor kv to high 700's low 800's.
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Offline Tim Wescott

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Re: Battery too Heavy
« Reply #2 on: August 19, 2019, 09:18:58 AM »
I got a 6s to match the motor I'm using but dang it's a lump. If I switch from a 6 cell to a 5 cell that still has enough capacity what's the worst that can happen?

You'll find out that batteries tend to have the same specific mass, i.e. a 5-cell, 3300mAh (59400 Joules) pack is going to weigh roughly the same as a 6-cell, 2800mAh (60500 Joules) pack.

Oh -- and when you use ESC and wire that's capable of handling 20% more current, that'll add weight, too.
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Online Ken Culbertson

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Re: Battery too Heavy
« Reply #3 on: August 19, 2019, 10:28:39 AM »
I got a 6s to match the motor I'm using but dang it's a lump. If I switch from a 6 cell to a 5 cell that still has enough capacity what's the worst that can happen?

Thanks,
Motorman 8)
If your 5s has enough head room (eg, you have around 30% after the pattern then the only difference I have found is that the added power to keep the RPM's up comes a little faster.  Almost undetectable.  I switched back to 5s 3000 because they were smaller and lighter.   The Thunderpower in mass is above my pay grade.  I will be getting a couple when they have their annual sale since I my ESC and wiring is for 6s.  The active timer folks I know seem to think the 6s is better.

Ken
« Last Edit: August 19, 2019, 11:27:25 PM by Ken Culbertson »
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Offline Randy Powell

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Re: Battery too Heavy
« Reply #4 on: August 19, 2019, 07:59:44 PM »
I've stuck with 5 cells for exactly that reason.
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Offline Wolfgang Nieuwkamp

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Re: Battery too Heavy
« Reply #5 on: August 29, 2019, 06:05:25 AM »
Percentage indication after flight I found to be not too reliable. For me, the cell voltage is a better indication. I reduced the nominal capacity until that voltage is 3,5 to 3,6 V.
Regards,
Wolfgang


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