[NSRCA-discussion] Going Electric - Battery Questions

[Patrick Harris]

Larry,

OK, here are my SD10G throttle curve settings. Keep in mind, I am currently
running a Jeti 99 with the "linear" curve setting in the ESC. With a HV80
ESC I found I didn't need the ramp to be as steep on the bottom, but pretty
close.

Point 1 = -125
2 = -65
3 = -27
4 = -3
5 = 11
6 = 23
7 = 44
8 = 59
9 = 100

This will get you in the ball park.

This is in a Nuance, so it's going to be pretty close to your set up.
On Fri, Dec 7, 2012 at 3:47 PM, Ed Alt <ed_alt at hotmail.com> wrote:

> True.  They will also discharge faster.
>
> Ed
>
> -----Original Message----- From: Duane Beck
> Sent: Friday, December 07, 2012 6:40 PM
> To: Larry Diamond ; General pattern discussion
>
> Subject: Re: [NSRCA-discussion] Going Electric - Battery Questions
>
> The higher C packs will have lower internal resistance, which means
> they'll maintain a higher voltage under load.  Higher voltage means the
> same motor with the same prop will draw more current.  More voltage * more
> current = a lot more power (W = V * I).
>
> Duane
>
> ----- Original Message -----
>
>> From: "Larry Diamond" <ldiamond at diamondrc.com>
>> To: "General pattern discussion" <nsrca-discussion at lists.nsrca.**org<nsrca-discussion at lists.nsrca.org>
>> >
>> Sent: Friday, December 7, 2012 6:17:47 PM
>> Subject: Re: [NSRCA-discussion] Going Electric - Battery Questions
>> Interesting point... I don't understand how changing from 20C to 40C
>> pack makes a difference using the same Motor and ESC combo. If it's
>> battery heat, my electronics background would tell me the pack is
>> probably being dicharged too deep. Not good for the life of a battery.
>>
>> I suspect the result of not changing the Motor/ESC and only changing
>> the battery will reult in a shorter battery life; and, over loading
>> the power plant which will probably result in damaging the ESC and/or
>> the Motor.
>>
>> I could be wrong, cause I really have no experience with electric
>> power set ups in planes. I just don't understand the logic going from
>> 20C to 40C and the result being "too hot for intermediate".
>>
>> It wouldn't surprise me to see Masters or FAI having a higher power
>> set up, like 3,500 to 4,000+ watts. Then depending on the max current
>> draw,  40C may make sense.
>>
>> My set up will be about 2,700 to 3,000 watts based on specs... It may
>> not be sufficient for Masters or FAI.
>>
>> Perhaps this will turn out to be a good constructive discussion for a
>> number of people like me, but I'm curious as to other opinions who
>> have practicle knowledge.
>>
>> Larry Diamond
>>
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