[NSRCA-discussion] Max volts

Tue Mar 2 04:29:44 AKST 2010

Keep this line of thinking in mind next time we talk about weight limits! Or any other rules proposal.

Anthony

> From: burtona at atmc.net
> To: nsrca-discussion at lists.nsrca.org
> Date: Mon, 1 Mar 2010 22:45:57 -0500
> Subject: Re: [NSRCA-discussion] Max volts
> 
> OK, So I have a question. Is knowingly and purposefully violating the intent
> and letter of the rules to gain a performance advantage called cheating?
> ....... Just asking!
> Dave Burton
> 
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of James Oddino
> Sent: Monday, March 01, 2010 7:16 PM
> To: General pattern discussion
> Subject: Re: [NSRCA-discussion] Max volts
> 
> I have the functional concept that solves the rules problem. Picture a 10S
> pack positive lead wired to the common of a switch with two poles, a piece
> of wire connected from one pole to a pole on a second two pole switch with
> its common connected to the ESC. Between the other two poles we place our
> 11th cell. When the 10S pack is above 37.5 volts the 11th cell is bypassed
> and when it is below, like it will be during vertical maneuvers late in
> flight, the 11th cell is put in series to boost the voltage to up to 41.7
> volts. At no time is the voltage over the spec.
> 
> Having said that, I believe the 10S system provides adequate power with the
> right motor at all times of flight even if the voltage drops to 35 volts.
> 
> Jim
> 
> 
> On Mar 1, 2010, at 8:59 AM, Bob Kane wrote:
> 
> > Going higher and regulating down would be against the rules, the max volts
> is still limited to 42.56. 
> > 
> > Bob Kane
> > getterflash at yahoo.com
> > 
> > 
> > --- On Mon, 3/1/10, krishlan fitzsimmons <homeremodeling2003 at yahoo.com>
> wrote:
> > 
> >> From: krishlan fitzsimmons <homeremodeling2003 at yahoo.com>
> >> Subject: Re: [NSRCA-discussion] Max volts
> >> To: chad at f3acanada.org, "General pattern discussion"
> <nsrca-discussion at lists.nsrca.org>
> >> Date: Monday, March 1, 2010, 9:54 AM
> >> 
> >> Couldn't we go to a higher voltage and
> >> regulate it back down? A contstant 42.56v would be nice!
> >> 
> >> Chris 
> >> 
> >> 
> >> 
> >> 
> >> 
> >> 
> >> 
> >> 
> >> 
> >> From: Chad
> >> Northeast <chad at f3acanada.org>
> >> To:
> >> nsrca-discussion at lists.nsrca.org
> >> Sent: Sun,
> >> February 28, 2010 8:48:48 PM
> >> Subject: Re:
> >> [NSRCA-discussion] Max volts
> >> 
> >> You would be at about 50% capacity at 3.85 ish volts/cell
> >> (resting open circuit), so unless you up the capacity you
> >> will have a pretty restricted flight time.
> >> 
> >> Chad
> >> 
> >> On 10-02-28 9:25 PM, Ron Van Putte wrote:
> >>> That stirs a wild thought in my brain. Fully
> >> charged packs don't stay at 4.2 volts per cell very
> >> long. On the other hand, once the initial charge
> >> voltage is burned off by a constant load, the voltage loss
> >> curve "flattens out". What if you put fully
> >> charged 6S and a 5S packs in series and "burn them
> >> down" to 3.869 volts per cell (a total of 42.56
> >> volts for an 11-cell pack) so they were legal for
> >> use. Would the voltage of this depleted 11S pack be
> >> higher than a fully charged 10S pack at the end of a typical
> >> flight? If the end-of-flight voltage might be
> >> significantly higher for the 11S pack vice a 10S pack, it
> >> would be worth investigating, even considering the extra
> >> weight of the additional cell. Come on you electronic
> >> gurus, show me where I'm wrong.
> >>> 
> >>> Ron Van Putte
> >>> 
> >>> On Feb 28, 2010, at 10:00 PM, James Oddino wrote:
> >>> 
> >>>> What comes after ...? Does it specify a load
> >> or any other conditions? Is it measured during the
> >> noise test and have a minimum value?
> >>>> 
> >>>> Just stirring the pot, Jim O
> >>>> 
> >>>> 
> >>>> On Feb 28, 2010, at 5:21 PM, John Fuqua wrote:
> >>>> 
> >>>>> No its not (assuming we are talking RC
> >> Aerobatics). Try page RCA-2 para 4.1
> >>>>> which
> >> states "Electrically-powered model aircraft are
> >> limited to a maximum
> >>>>> of 42.56 volts.."
> >>>>> 
> >>>>> -----Original Message-----
> >>>>> From: nsrca-discussion-bounces at lists.nsrca.org
> >>>>> [mailto:nsrca-discussion-bounces at lists.nsrca.org]
> >> On Behalf Of Ron Van Putte
> >>>>> Sent: Sunday, February 28, 2010 7:07 PM
> >>>>> To: General pattern discussion
> >>>>> Subject: Re: [NSRCA-discussion] Max volts
> >>>>> 
> >>>>> It's in the general rules, not in the R/C
> >> section.
> >>>>> 
> >>>>> 
> >>>>> On Feb 28, 2010, at 6:50 PM, Jim Quinn wrote:
> >>>>> 
> >>>>>> Where can I find the rule
> >> for max volts?
> >>>>>> 
> >>>>>> 
> >> _______________________________________________
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> >>>>>> 
> >> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> >>>>> 
> >>>>> 
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> >>>>> 
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