[NSRCA-discussion] HV pack question about Nats voltage checks.

[Jon Dieringer]

45/11 is only 4.09 V/cell. 46.2V is 11x4.2V

On Sat, Jun 13, 2020 at 6:03 PM mups53 via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> 45 volts equals an 11s. A six and a five.
> Hmmmm.
>  New KV requirements right?
>  Mike
>
>
>
> Sent from my Verizon, Samsung Galaxy smartphone
>
>
> -------- Original message --------
> From: Jas S via NSRCA-discussion <nsrca-discussion at lists.nsrca.org>
> Date: 6/13/20 2:29 PM (GMT-06:00)
> To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
> Subject: Re: [NSRCA-discussion] HV pack question about Nats voltage
> checks.
>
> F3A is 42.56v
>
>
>
> Jas iP
>
> On Jun 13, 2020, at 8:50 AM, Tjpritchett via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org> wrote:
>
> This year the rules have changed. 45 volts is the limit.  It was written
> to allow HV packs. Here’s the amendment in the 2020 AMA comp regs.....
>
> 4.1. Propulsion source limitations
> Any suitable propulsion source may be used except those requiring solid
> expendable propellants, gaseous fuels (at room temperature and atmospheric
> pressure) or liquefied gaseous fuels. Electrically-powered model aircraft
> are limited to a maximum of 45.0 volts for the propulsion circuit, measured
> prior to flight while the competitor is in the ready box. A tolerance of 1%
> will be allowed for possible inconsistencies in measurement instruments and
> measurement operator error for battery voltage. A CD may waive all or some
> of the requirements for voltage measurement if not practical.
>
> Sent from my iPhone
>
> On Jun 13, 2020, at 8:46 AM, mups53 via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org> wrote:
>
> At the Nats last year it was 42.999999. In Masters.
> Mike
>
>
>
> Sent from my Verizon, Samsung Galaxy smartphone
>
>
> -------- Original message --------
> From: Jas S via NSRCA-discussion <nsrca-discussion at lists.nsrca.org>
> Date: 6/13/20 6:37 AM (GMT-06:00)
> To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
> Subject: Re: [NSRCA-discussion] HV pack question about Nats voltage
> checks.
>
> I believe F3A is still at 4.25v or 4.28v? It’s still early so I may be off
>
> Jas iP
>
> On Jun 13, 2020, at 12:19 AM, Joe Lachowski via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org> wrote:
>
> 
>
> Battery checks on the flight line are really a waste of time. I did the
> checks at the 2011 Worlds in Muncie. A random cell count is all that is
> needed just to make sure no one is using 11 or higher cell count packs. HV
> packs are now legal too.
>
>
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
>
>
> *From: *mups53 via NSRCA-discussion <nsrca-discussion at lists.nsrca.org>
> *Sent: *Friday, June 12, 2020 8:21 PM
> *To: *General pattern discussion <nsrca-discussion at lists.nsrca.org>
> *Subject: *[NSRCA-discussion] HV pack question about Nats voltage checks.
>
>
>
>
>
> So here it goes.
>
> This has been wearing on me since the Nats last year.
>
>  Let me start by saying that I market the 5S HV packs. A 10S pack is
> capable of charging to 43.5 volts. The rules say the legal limit is 42.99
> volts. Capacity increases on the 5100 10S in the neighborhood of 500 mAh
> with the added volt. That's consistent and quantifiable on my Power Lab
> chargers. So the added capacity is significant. In my case needed because I
> had a weight issue and was using the lighter 5100 packs instead of the 5800
> packs I normally like in competition.
>
>  So here's the issue. At the Nats HV pack users were identified and
> voltage checked before each flight. Non HV pack users no check needed. The
> ID process was to look at the label on the packs. So I have labels for our
> packs that say they are HV. I also have labels laying around that don't say
> HV. Albeit they say Gator Power packs instead of Power Unlimited HV. Anyone
> could easily dupe the system by putting a false label on an HV pack if
> that's the only criteria in place.
>
>  In fairness I believe all packs should get checked on the ready box.
> Every single fliers packs or don't check any. Or we could use an honor
> system which by all means I and I hope others would adhere to thus
> eliminating the need to check.
>
>  I hope to hear opinions on this and that it changes how it's being
> handled now.
>
>
>
> Thanks, Mike Mueller
>
>
>
>
>
> Sent from my Verizon, Samsung Galaxy smartphone
>
>
>
>
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-- 

Thanks,
Jon
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